Platinum nanoparticles supported on defective tungsten bronze-type KSr2Nb5O15 as a novel photocatalyst for efficient ethylene oxidation
作者：
Zhang, Wei;Pan, Xiaoyang;Long, Peiqing;Liu, Xitao;Long, Xia;...
期刊：
Journal of Materials Chemistry A ,2017年5(36):18998-19006 ISSN：2050-7488
通讯作者：
Yi, Zhiguo;Yu, Ying
作者机构：
[Pan, Xiaoyang; Zhang, Wei; Yi, Zhiguo; Long, Peiqing; Liu, Xitao; Long, Xia] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China.;[Zhang, Wei; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;[Yi, Zhiguo] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
通讯机构：
[Yi, Zhiguo; Yu, Ying] C;[Yi, Zhiguo] U;Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China.;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
摘要：
Efficient separation and extraction of photo-induced carriers are crucial aspects of efficient semiconductor photocatalytic systems employed for photocatalytic oxidation (PCO) technology. In this study, a Pt-loaded KSr2Nb5O15 composite, as a novel photocatalyst, is reported for gaseous ethylene photo-oxidation, performing excellent PCO activity. Tungsten bronze-type KSr2Nb5O15 (KSNO) with surface oxygen vacancies is prepared by a facile and low-cost molten salt synthesis method at 1200 °C for 6 h and a possible morphology evolution process was proposed. Pt was loaded on KSNO through a facile photodeposition method. The strong metal-support interaction (SMSI) between the Pt nanoparticles and the oxygen-deficient KSNO support is beneficial for superior photocatalytic efficiency and stability toward ethylene photo-oxidation. What's more, the structure and charge transfer path in the synthesized photocatalysts were investigated by X-ray photoelectron spectroscopy (XPS), high-resolution electron microscopy, and electron paramagnetic resonance (EPR). © 2017 The Royal Society of Chemistry.
语种：
英文
展开
Copper nanoparticle interspersed MoS2 nanoflowers with enhanced efficiency for CO2 electrochemical reduction to fuel
作者：
Shi, Guodong;Yu, Luo;Ba, Xin;Zhang, Xiaoshu;Zhou, Jianqing;...
期刊：
DALTON TRANSACTIONS ,2017年46(32):10569-10577 ISSN：1477-9226
通讯作者：
Yu, Ying
作者机构：
[Ba, Xin; Zhang, Xiaoshu; Yu, Ying; Shi, Guodong; Yu, Luo; Zhou, Jianqing] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
摘要：
Electrocatalytic conversion of carbon dioxide (CO2) has been considered as an ideal method to simultaneously solve the energy crisis and environmental issue around the world. In this work, ultrasmall Cu nanoparticle interspersed flower-like MoS2 was successfully fabricated via a facile microwave hydrothermal method. The designed optimal hierarchical Cu/MoS2 composite not only exhibited remarkably enhanced electronic conductivity and specific surface area but also possessed improved CO2 adsorption capacity, resulting in a significant increase in overall faradaic efficiency and a 7-fold augmentation of the faradaic efficiency of CH4 in comparison with bare MoS2. In addition, the Cu/MoS2 composite had superior stability with high efficiency retained for 48 h in the electrochemical process. It is anticipated that the designed Cu/MoS2 composite electrocatalyst may provide new insights for transition metal sulfides and non-noble particles applied to CO2 reduction. © 2017 The Royal Society of Chemistry.
语种：
英文
展开
Controllable synthesis of SrCO3 with different morphologies and their co-catalytic activities for photocatalytic oxidation of hydrocarbon gases over TiO2
作者：
Zhang, Wei;Yu, Ying* ;Yi, Zhiguo*
期刊：
Journal of Materials Science ,2017年52(9):5106-5116 ISSN：0022-2461
通讯作者：
Yu, Ying;Yi, Zhiguo
作者机构：
[Zhang, Wei; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Zhang, Wei; Yi, Zhiguo] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China.;[Zhang, Wei; Yi, Zhiguo] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Peoples R China.
通讯机构：
[Yu, Ying; Yi, Zhiguo] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China.;Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Peoples R China.
关键词：
TiO2;Photocatalytic Activity;Reverse Micelle;Photocatalytic Oxidation;Field Emission Scanning Electron Microscope Image
摘要：
The controlled synthesis of strontium carbonate (SrCO<inf>3</inf>) micro-/nanostructures with various morphologies, such as sphere, pompon, arborization, spindle, and hexagonal prism, are successfully achieved through rather facile hydrothermal processes. The morphology of SrCO<inf>3</inf>can be elegantly adjusted by employing different CO<inf>3</inf><sup>2−</sup>sources and controlling the viscidity of the organic solvents. The underlying mechanism of morphology evolution is discussed. Moreover, the SrCO<inf>3</inf>-loaded TiO<inf>2</inf>(SrCO<inf>3</inf>/TiO<inf>2</inf>) nanocomposites are shown to improve the activity for oxidizing hydrocarbon gases under simulated solar light irradiation. The 5.0 wt% SrCO<inf>3</inf>(nanosphere)/TiO<inf>2</inf>exhibited the highest performance toward the oxidation of the hydrocarbons gases, and its activity on methane oxidation is more than double that of P25 TiO<inf>2</inf>. These results are valuable for both carbonate synthesis and their use in the oxidation of hydrocarbons gases. ©2017, Springer Science+Business Media New York.
语种：
英文
展开
Hierarchical Cu@CoFe layered double hydroxide core-shell nanoarchitectures as bifunctional electrocatalysts for efficient overall water splitting
作者：
Yu, Luo;Zhou, Haiqing;Sun, Jingying;Qin, Fan;Luo, Dan;...
期刊：
Nano Energy ,2017年41:327-336 ISSN：2211-2855
通讯作者：
Yu, Ying;Chen, Shuo;Ren, Zhifeng
作者机构：
[Li, Yong; Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Luo, Dan; Chen, Shuo; Ren, Zhifeng; Xie, Lixin; Zhou, Haiqing; Yu, Luo; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Luo, Dan; Chen, Shuo; Ren, Zhifeng; Xie, Lixin; Zhou, Haiqing; Yu, Luo; Sun, Jingying; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Bao, Jiming; Qin, Fan] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.;[Luo, Dan] Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA.
通讯机构：
[Yu, Ying] C;[Chen, S; Ren, ZF] U;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.
关键词：
Bifunctional;Core-shell;Hierarchical;Overall water splitting;[email protected] LDH
摘要：
Efficient and low-cost bifunctional catalysts toward both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for overall water splitting are of great significance to energy and environmental sustainability. Here, we report on a novel hierarchical Cu@CoFe layered double hydroxide (LDH) core-shell nanostructure catalyst for efficient overall water splitting in the alkaline medium. Benefiting from the smart structure, the optimized composite affords small overpotentials of 171 mV for the HER and 240 mV for the OER at a current density of 10 mA cm<sup>−2</sup>, along with Tafel slopes of 36.4 and 44.4 mV dec<sup>−1</sup>for the HER and OER, respectively. Strikingly, the overall water splitting performance is very good since it just requires a voltage of 1.681 V to gain a current density of 10 mA cm<sup>−2</sup>, which is only 60 mV larger than the benchmark of IrO<inf>2</inf>(+)/Pt (−) electrodes. Moreover, the optimized composite electrodes exhibit outstanding durability within 48 h testing, which is much better than that of the benchmark. Our rational design of the hierarchical core-shell nanoarchitectures presents a simple approach to fabricate advanced catalysts for water splitting. ©2017 Elsevier Ltd
语种：
英文
展开
Light responsive hybrid nanofibres for on-demand therapeutic drug and cell delivery
作者：
Li, Yan-Fang;Slemming-Adamsen, Peter;Wang, Jing;Song, Jie;Wang, Xueqin;...
期刊：
Journal of Tissue Engineering and Regenerative Medicine ,2017年11(8):2411-2420 ISSN：1932-6254
通讯作者：
Chen, Menglin
作者机构：
[Slemming-Adamsen, Peter; Li, Yan-Fang; Wang, Xueqin; Chen, Menglin; Besenbacher, Flemming; Song, Jie; Dong, Mingdong] Aarhus Univ, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus, Denmark.;[Chen, Chunying; Wang, Jing] Natl Ctr Nanosci & Technol, Beijing, Peoples R China.;[Li, Yan-Fang; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan, Hubei, Peoples R China.
通讯机构：
[Chen, Menglin] A;Aarhus Univ, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus, Denmark.
关键词：
light responsive;nanofibres;on-demand;drug release;cell delivery
摘要：
Smart materials for on-demand delivery of therapeutically active agents are challenging in pharmaceutical and biomaterials science. In the present study, we report hybrid nanofibres capable of being reversibly controlled to pulsatile deliver both therapeutic drugs and cells on-demand of near-infrared (NIR) light. The nanofibres, fabricated by co-electrospinning of poly (N-isopropylacrylamide), silica-coated gold nanorods and polyhedral oligomeric silsesquinoxanes have, for the first time, demonstrated rapid, reversible large-volume changes of 83% on-demand with NIR stimulation, with retained nanofibrous morphology. Combining with the extracellular matrix-mimicking fibrillary properties, the nanofibres achieved accelerated release of model drug or cells on demand with NIR triggering. The release of the model drug doxorubicin demonstrated normal anti-cancer efficacy by reducing the viability of human cervical cancer HeLa cells by 97% in 48 h. In parallel, the fibres allowed model cell NIH3T3 fibroblast entrapment, adhesion, proliferation, differentiation and, upon NIR irradiation, cell release with undisturbed cellular function. Copyright © 2016 John Wiley & Sons, Ltd.
语种：
英文
展开
In-situ synthesis of TiO_2 rutile/anatase heterostructure by DC magnetron sputtering at room temperature and thickness effect of outermost rutile layer on photocatalysis
作者：
Wang Hui;Shi Guodong;Zhang Xiaoshu;Zhang Wei;Huang Lin;...
期刊：
环境科学学报(英文版) ,2017年60(10):33-42 ISSN：1001-0742
通讯作者：
Yu Ying
作者机构：
[Zhang Xiaoshu; Zhang Wei; Yu Ying; Shi Guodong; Huang Lin; Wang Hui] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Wang Hui] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Syst Sci Met Proc, Wuhan 430081, Hubei, Peoples R China.
通讯机构：
[Yu Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
TiO_2 film;Heterostructure;Magnetron sputtering;Dye degradation
摘要：
TiO_2 rutile/anatase heterostructure thin films with varying rutile thickness have been in-situ synthesized via DC magnetron sputtering with Ar gas at room temperature. The crystal texture, surface morphology, energy gap and optical properties of the films have been investigated by X-ray diffraction meter, grazing incidence X-ray diffraction meter, Raman spectroscopy, scanning electron microscopy, and UV–visible spectrophotometer, which indicates that the rutile/anatase heterostructure films are successfully fabricated. The further degradation experiments display that the photocatalytic activity can be dramatically affected by the thickness of the outmost rutile layer and the 100 nm thickness exhibits the best performance in all of the TiO_2 thin films. With the increase of the outmost rutile layer, the optical band gap of TiO_2 film displays a systematic decrease slightly. However, the change in photocatalytic activity does not coincide with that in the band gap. The photoresponse and electrochemical properties of the thin films have been characterized to understand the mechanism of the varied photocatalytic activity.
语种：
英文
展开
A Model to Stabilize CO2 Uptake Capacity during Carbonation-Calcination Cycles and its Case of CaO-MgO
作者：
Zhu, Qiancheng;Zeng, Shibi;Yu, Ying*
期刊：
Environmental Science & Technology ,2017年51(1):552-559 ISSN：0013-936X
通讯作者：
Yu, Ying
作者机构：
[Zhu, Qiancheng; Zeng, Shibi; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
Nowadays, capturing anthropogenic CO2 in a highly efficient and cost-effective way is one of the most challenging issues. Herein, the key parameters to stabilize CO2 uptake capacity have been studied based on four kinds of pure calcium oxides (CaO) prepared by a simple calcination method with four different calcium precursors. A simple ideal particle model was proposed to illustrate the uniform distribution of pure CaO, in which the CO2 uptake capacity is positively related with surface area of CaO particles and the stability is opposite to the distance between two CaO particles after carbonation. The adsorption capacity of the best sample with a distance of 398 nm between two CaO particles after carbonation only lost 0.344% per cycle, which is originated from the low possibility of the agglomeration between neighboring particles. On the basis of the proposed model, the composite with magnesium oxide (MgO) distributed uniformly in CaO was fabricated by a simple ball milling method, which possessed an excellent stability with a decay rate of only 3.9% over 100 carbonation-calcination cycles. In this case, MgO played as inert to increase the distance between CaO particles for agglomeration prevention. © 2016 American Chemical Society.
语种：
英文
展开
Cu nanowires shelled with NiFe layered double hydroxide nanosheets as bifunctional electrocatalysts for overall water splitting
作者：
Yu, Luo;Zhou, Haiqing;Sun, Jingying;Qin, Fan;Yu, Fang;...
期刊：
Energy & Environmental Science ,2017年10(8):1820-1827 ISSN：1754-5692
通讯作者：
Yu, Ying;Chen, Shuo;Ren, Zhifeng
作者机构：
[Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Zhou, Haiqing; Chen, Shuo; Yu, Luo; Chen, S; Ren, Zhifeng; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Zhou, Haiqing; Chen, Shuo; Yu, Luo; Chen, S; Ren, Zhifeng; Sun, Jingying; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Qin, Fan; Bao, Jiming] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.
通讯机构：
[Yu, Ying] C;[Chen, S; Ren, ZF] U;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.
摘要：
Developing highly active and low-cost electrocatalysts with superior durability for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is a grand challenge to produce hydrogen by electrolysis of water. Here, we report on a facile and scalable approach to fabricate highly efficient three-dimensional (3D) bulk catalysts of core-shell nanostructures, in which few-layer NiFe layered double hydroxide (LDH) nanosheets are grown on Cu nanowire cores supported on Cu foams, toward overall water splitting. Remarkably, benefiting from the 3D hierarchical nanoarchitecture with large surface areas, fast electron transport, and open-channels for effective gas release, the resulting 3D self-standing catalysts exhibit outstanding OER activity as well as excellent HER performance in an alkaline medium. Using them as bifunctional catalysts for overall water splitting, a current density of 10 mA cm-2 was achieved at a voltage of 1.54 V, and 100 mA cm-2 at 1.69 V with excellent durability, which is much better than the benchmark of IrO2(+)//Pt(-) electrodes. Our 3D core-shell electrocatalysts significantly advance the research towards large-scale practical water electrolysis. © The Royal Society of Chemistry 2017.
语种：
英文
展开
Giant Enhancement of Internal Electric Field Boosting Bulk Charge Separation for Photocatalysis
作者：
Li, Jie;Cai, Lejuan;Shang, Jian;Yu, Ying;Zhang, Lizhi*
期刊：
Advanced Materials ,2016年28(21):4059-4064 ISSN：0935-9648
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Jie; Cai, Lejuan; Shang, Jian] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
关键词：
bulk-charge separation;doping;internal electric field;photocatalysis;water oxidation
摘要：
A study was conducted to demonstrate giant enhancement of internal electric field (IEF) boosting bulk charge separation (BCS) for photocatalysis. The study synthesized C-doped Bi3O4 Cl nanosheets with reported carbon doping strategy. These nanosheets had {001} facets on their top and bottom, {110} facets on their four lateral surfaces, and {010} facets at their four corners. Their elemental mapping images and time-resolved X-ray photoelectron spectroscopy revealed the homogeneous distribution of carbon dopants within Bi3O4.
语种：
英文
展开
Carbon-Infused MoS2 Supported on TiO2 Nanosheet Arrays for Intensified Anodes in Lithium Ion Batteries
作者：
Li, Guojian;Yu, Luo;Hu, Hao;Zhu, Qiancheng;Wang, Yueyan;...
期刊：
Electrochimica Acta ,2016年212:59-67 ISSN：0013-4686
通讯作者：
Yu, Ying
作者机构：
[Li, Guojian; Zhu, Qiancheng; Hu, Hao; Yu, Ying; Yu, Luo; Wang, Yueyan] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
关键词：
TiO 2 @MoS 2 /C;TiO 2 nanosheet arrays;carbon infused MoS 2;intensified anodes
摘要：
Graphite anodes in commercialized lithium ion batteries are meeting the bottleneck for future high-performance electronic devices. Strategies has been applied to improve the cycle and rate capacity of the anode active materials. Herein, a two-step hydrothermal approach is presented to synthesize TiO<inf>2</inf>@MoS<inf>2</inf>/C as enhanced anodic electrode. The TiO<inf>2</inf>@MoS<inf>2</inf>/C electrode delivers a satisfying cycle performance of 643.4 mAh/g on average at a current of 100 mA/g upon 100 cycles. The comparison study shows that TiO<inf>2</inf>@MoS<inf>2</inf>/C are superior to its individual part when assembled into batteries. The result also demonstrates that the support from TiO<inf>2</inf>nanosheet arrays is essential to achieve both improved cycle and rate performance. Without TiO<inf>2</inf>scaffold as an intermediate, MoS<inf>2</inf>/C is not able to firmly attach to Ti substrate and tends to be exfoliated upon cycling. Besides, the presence of carbon remarkably improves the poor conductivity of TiO<inf>2</inf>and MoS<inf>2</inf>, which is beneficial to elevate rate capacity at high currents. ©2016 Elsevier Ltd
语种：
英文
展开
Superior visible light hydrogen evolution of Janus bilayer junctions via atomic-level charge flow steering
作者：
Li, Jie;Zhan, Guangming;Yu, Ying;Zhang, Lizhi*
期刊：
Nature Communications ,2016年7(1):11480 ISSN：2041-1723
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Jie; Zhan, Guangming] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanoscience & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
摘要：
Although photocatalytic hydrogen evolution (PHE) is ideal for solar-to-fuel conversion, it remains challenging to construct a highly efficient PHE system by steering the charge flow in a precise manner. Here we tackle this challenge by assembling 1T MoS2 monolayers selectively and chemically onto (Bi12O17) end-faces of Bi12O17Cl2 monolayers to craft two-dimensional (2D) Janus (Cl2)-(Bi12O17)-(MoS2) bilayer junctions, a new 2D motif different from van der Waals heterostructure. Electrons and holes from visible light-irradiated Bi12O17Cl2 are directionally separated by the internal electric field to (Bi12O17) and (Cl2) end-faces, respectively. The separated electrons can further migrate to MoS2 via Bi-S bonds formed between (Bi12O17) and MoS2 monolayers. This atomic-level directional charge separation endows the Janus bilayers with ultralong carrier lifetime of 3,446 ns and hence a superior visible-light PHE rate of 33 mmol h-1 g-1. Our delineated Janus bilayer junctions on the basis of the oriented assembly of monolayers presents a new design concept to effectively steer the charge flow for PHE.
语种：
英文
展开
Co-dopant influence on near-infrared luminescence properties of Zn2SnO4:Cr3+, Eu3+ ceramic discs
作者：
Zhang, Yi;Huang, Rui* ;Lin, Zhenxu;Song, Jie;Wang, Xiang;...
期刊：
Journal of Alloys and Compounds ,2016年686:407-412 ISSN：0925-8388
通讯作者：
Huang, Rui;Yu, Ying
作者机构：
[Huang, Rui; Zhang, Yi; Lin, Zhenxu] Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;[Wang, Xiang; Song, Jie; Huang, Rui; Zhang, Yi; Yu, Ying; Song, Chao; Guo, Yanqing] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Huang, Rui] H;[Yu, Ying] C;Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Near-infrared;Optical properties;Persistent luminescence
摘要：
Bright near-infrared (NIR) luminescent ceramic discs of Zn<inf>2</inf>SnO<inf>4</inf>:Cr<sup>3+</sup>, Eu<sup>3+</sup>were synthesized by a solid state method. The phase structure was checked by XRD. The photoluminescence and persistent luminescence decay properties of Cr<sup>3+</sup>, Eu<sup>3+</sup>-codoped samples were studied systematically. The photoluminescence and photoluminescence excitation spectra revealed that the NIR emission (centered at 800 nm) of Cr<sup>3+</sup>was significantly enhanced after the incorporation of Eu<sup>3+</sup>ions, which was attributed to the energy transfer from Eu<sup>3+</sup>ions to Cr<sup>3+</sup>. Moreover, the incorporation of Eu<sup>3+</sup>ions could effectively delay the decay rate and enhance the NIR persistent luminescence. The analysis of persistent decay curves and thermoluminescence spectra indicated that the Eu<sup>3+</sup>ions acting as effective deep-trap centers contributed to improved Cr<sup>3+</sup>NIR persistent luminescence. ©2016 Elsevier B.V. All rights reserved.
语种：
英文
展开
Enhanced Activity and Stability of Carbon-Decorated Cuprous Oxide Mesoporous Nanorods for CO2 Reduction in Artificial Photosynthesis
作者：
Yu, Luo;Li, Guojian;Zhang, Xiaoshu;Ba, Xin;Shi, Guodong;...
期刊：
ACS CATALYSIS ,2016年6(10):6444-6454 ISSN：2155-5435
通讯作者：
Yu, Ying
作者机构：
[Li, Guojian; Ba, Xin; Zhang, Xiaoshu; Li, Yong; Yu, Ying; Yu, Luo; Shi, Guodong] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Wong, Po Keung] Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China.;[Yu, Jimmy C.] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
Cu2O mesoporous nanorods;carbon coating;photocatalysis;CO2 reduction;stability;visible light
摘要：
The development of photocatalysts with superior activity and stability to produce organic fuels through CO2 reduction under renewable sunlight is of great significance due to the depletion of fossil fuels and severe environmental problems. In this study, we presented a "hitting three birds with one stone" strategy to synthesize carbon layer coated cuprous oxide (Cu2O) mesoporous nanorods on Cu foils via a facile chemical oxidation and subsequent carbonization method. The thin carbon layer not only works as a protective layer to quench the common photocorrosion problem of Cu2O but also endows the sample a mesoporous and one-dimensional nanorod structure, which can facilitate reactant molecule adsorption and charge carrier transfer. Substantially, the coated samples exhibited remarkably improved stability as well as decent activity for CO2 reduction under visible light irradiation. The optimized sample attained an apparent quantum efficiency of 2.07% for CH4 and C2H4 at λ0 400 nm, and 93% activity remained after six photoreduction cycles under visible light. This work provides a facile strategy to address the stability and activity issues of Cu2O under visible light irradiation, which is presumably suitable for other semiconductors as promising candidates for CO2 reduction in artificial photosynthesis. © 2016 American Chemical Society.
语种：
英文
展开
Multiple magnification effects of Ce3+ ions on near-infrared persistent luminescence of Crdoped LaAlO3
作者：
Zhang, Yi;Huang, Rui* ;Lin, Zhenxu;Song, Jie;Wang, Xiang;...
期刊：
Optical Materials Express ,2016年6(3):922-928 ISSN：2159-3930
通讯作者：
Huang, Rui
作者机构：
[Zhang, Yi; Yu, Ying; Lin, Zhenxu] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Wang, Xiang; Song, Jie; Huang, Rui; Song, Chao; Guo, Yanqing] Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;[Robertson, John; Huang, Rui] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
通讯机构：
[Huang, Rui] H;[Huang, Rui] U;Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
关键词：
Energy transfer;Ions;Luminescence;Near infrared radiation;Photoluminescence;Ultraviolet radiation
摘要：
Ce<sup>3+</sup>/Cr<sup>3+</sup>co-doped LaAlO<inf>3</inf>for near-infrared (NIR) long lasting phosphors were synthesized through solid-state reaction. Incorporation of Ce<sup>3+</sup>ions into Cr<sup>3+</sup>-doped LaAlO<inf>3</inf>significantly enhanced the NIR persistent luminescence by more than one order of magnitude compared with LaAlO<inf>3</inf>doped with Cr<sup>3+</sup>. Detailed analysis of the photoluminescence, photoluminescence excitation, and Thermo-luminescence spectra, as well as the persistent decay behavior of Ce<sup>3+</sup>/Cr<sup>3+</sup>co-doped LaAlO<inf>3</inf>, indicated that the improvement of NIR persistent luminescence at around 735 nm (Cr<sup>3+</sup>:<sup>2</sup>E→<sup>4</sup>A<inf>2</inf>transition) is not only originated from a persistent energy transfer process from Ce<sup>3+</sup>ions to Cr<sup>3+</sup>ions, but also attributed to the extra efficient traps created by incorporation of Ce<sup>3+</sup>ions. The current work develops an alternative approach toward the efficient NIR Cr<sup>3+</sup>-doped non-gallate longpersistence phosphors. ©2016 Optical Society of America.
语种：
英文
展开
TiO2 thin films with rutile phase prepared by DC magnetron co-sputtering at room temperature: Effect of Cu incorporation
作者：
Wang, Hui;Li, Yujie;Ba, Xin;Huang, Lin;Yu, Ying*
期刊：
Applied Surface Science ,2015年345:49-56 ISSN：0169-4332
通讯作者：
Yu, Ying
作者机构：
[Wang, Hui; Ba, Xin; Yu, Ying; Huang, Lin; Li, Yujie] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Wang, Hui] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Syst Sci Met Proc, Wuhan 430081, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
Anatase;Band gap;DC magnetron sputtering;Rutile;TiO 2 thin film
摘要：
The thin films for pure TiO 2 and that incorporated with Cu ion were deposited by DC magnetron co-sputtering with Ar gas. The crystal texture, surface morphology, energy gap and optical properties of the prepared films have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectrometer (XPS), UV-vis spectrophotometer, and Raman spectroscopy. The results show that as-deposited TiO 2 film mainly possesses anatase structure at room temperature with pure Ar gas, but the introduction of Cu can alter the phase structure of crystallite TiO 2 . XRD patterns and Raman spectra indicate that the Cu incorporation with high concentration (A Cu /A Ti + A Cu ≈ 20%) favors the formation of rutile phase. Moreover, the Cu incorporation into TiO 2 lattice induces band gap narrowing. Band structures and density of states have been analyzed based on density functional theory (DFT) and periodic models in order to investigate the influence of the Cu incorporation on the electronic structure of TiO 2 . Both experimental data and electronic structure calculations evidence the fact that the change in film structure from the anatase to the rutile phase can be ascribed to the possible incorporation of Cu 1+ in the sites previously occupied by Ti 4+ , and the presence of Cu results in important effect on the electronic states, which is mainly related to the 3d Cu orbitals in the gap and in the vicinity of the valence band edges for TiO 2 . © 2015 Elsevier B.V. All rights reserved.
语种：
英文
展开
Octahedral Cu2 O-modified TiO2 nanotube arrays for efficient photocatalytic reduction of CO2
作者：
Li, Yanfang;Zhang, Wenpei;Shen, Xing;Peng, Pengfei;Xiong, Liangbin;...
期刊：
催化学报 ,2015年36(12):2229-2236 ISSN：0253-9837
通讯作者：
Yu, Ying
作者机构：
[Li, Yanfang; Peng, Pengfei; Zhang, Wenpei; Yu, Ying; Shen, Xing] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Xiong, Liangbin] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Titania nanotube arrays;Octahedral cuprous oxide nanoparticles;Photocatalytic carbon dioxide reduction;Hydrocarbon product;Photoactivity
摘要：
A photocatalyst composed of TiO2 nanotube arrays (TNTs) and octahedral Cu2O nanoparticles was fabricated, and its performance in the photocatalytic reduction of CO2 under visible and simulated solar irradiation was studied. The average nanotube diameter and length was 100 nm and ~5 μm, respectively. The different amount of octahedral Cu2O modified TNTs were obtained by varying electrochemical deposition time. TNTs modified with an optimized amount of Cu2O nanoparticles exhibited high efficiency in the photocatalysis, and the predominant hydrocarbon product was methane. The methane yield increased with increasing Cu2O content of the catalyst up to a certain deposition time, and decreased with further increase in Cu2O deposition time. Insufficient deposition time (5 min) resulted in a small amount of Cu2O nanoparticles on the TNTs, leading to the disadvantage of harvesting light. However, excess deposition time (45 min) gave rise to entire TNT surface being most covered with Cu2O nanoparticles with large sizes, inconvenient for the transport of photo-generated carriers. The highest methane yield under simulated solar and visible light irradiation was observed for the catalysts prepared at a Cu2O deposition time of 15 and 30 min respectively. The morphology, crystallization, photoresponse and electrochemical properties of the catalyst were characterized to understand the mechanism of its high photocatalytic activity. The TNT structure provided abundant active sites for the adsorption of reactants, and promoted the transport of photogenerated carriers that improved charge separation. Modifying the TNTs with octahedral Cu2O nanoparticles promoted light absorption, and prevented the hydrocarbon product from oxidation. These factors provided the Cu2O-modified TNT photocatalyst with high efficiency in the reduction of CO2, without requiring co-catalysts or sacrificial agents. © 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
语种：
英文
展开
Design of SnO2/C hybrid triple-layer nanospheres as Li-ion battery anodes with high stability and rate capability
作者：
Hu, Hao;Cheng, Haoyan;Li, Guojian;Liu, Jinping;Yu, Ying*
期刊：
Journal of Materials Chemistry A ,2015年3(6):2748-2755 ISSN：2050-7488
通讯作者：
Yu, Ying
作者机构：
[Li, Guojian; Liu, Jinping; Hu, Hao; Cheng, Haoyan; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
The problems of the large volume change during Li insertion and extraction and poor high-power performance of SnO2-based electrodes should be solved for their practical application. Herein, a novel SnO2/C hybrid triple-type nanosphere, in which a layer of amorphous carbon was sandwiched between the layers of the SnO2 and carbon composite, has been designed and fabricated by a top-down approach. Due to its special structure, this kind of SnO2-based electrode exhibited a considerable capacitive performance, offering a greatly enhanced cycling stability and rate capability. Its capacity remained as high as 653 mA h g-1 after the 350th cycle. The irreversible capacity decay was unprecedentedly extended to the 80th cycle. What is more, this electrode even exhibited a capacity of 260 mA h g-1 at 20 C, with a fading of less than 16% after 600 cycles and less than 22% even after 1000 cycles. © The Royal Society of Chemistry 2015.
语种：
英文
展开
Enhanced photocatalytic activity of α-Bi2O3 with high electron-hole mobility by codoping approach: A first-principles study
作者：
Li, Yujie;Yang, Fan* ;Yu, Ying
期刊：
Applied Surface Science ,2015年358:449-456 ISSN：0169-4332
通讯作者：
Yang, Fan
作者机构：
[Yu, Ying; Li, Yujie] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Yang, Fan] Wuhan Text Univ, Inst Elect & Elect Engn, Wuhan 430200, Peoples R China.
通讯机构：
[Yang, Fan] W;Wuhan Text Univ, Inst Elect & Elect Engn, Wuhan 430200, Peoples R China.
会议名称：
1st International Workshop on Graphene and C3N4-based Photocatalysts (IWGCP)
会议时间：
JUN 05-08, 2015
会议地点：
Wuhan Univ Technology, Wuhan, PEOPLES R CHINA
会议主办单位：
Wuhan Univ Technology
关键词：
Bi 2 O 3;Codoping;DFT calculation;Electronic structure
摘要：
To improve the photocatalytic activity of narrow-gap material Bi 2 O 3 , efforts need be made to lower the electron-hole recombination rate and widen the response range of visible light. Understanding the related mechanism is vital, which may lead to high electron-hole mobility and suitable band edge. In this paper we have studied the atomic and electronic structure of single metallic atom (Ag, Cu, Pb, Pd, Sn)-doped and nitrogen (N)-metal codoped Bi 2 O 3 with α phase by first principles calculations. The calculation results firstly show that new impurity states appeared in band gap of α-Bi 2 O 3 after single metal doping, especially for the doping of Cu, Ag and Pb, which showed shallow acceptor levels for α-Bi 2 O 3 . And the formation energy analysis indicates that Cu doped system was easier to be formed than other doped systems. All of those calculated properties are helpful to enhance the photocatalytic property of α-Bi 2 O 3 , which agrees well with experimental results. Interestingly, for anion atom N together with metallic atom (Ag, Cu, Pb, Pd, Sn) codoped α-Bi 2 O 3 systems, it is found that N-2p state had impact on the electronic structure. Holes were demonstrated to be more delocalized in (Cu + N) codoped α-Bi 2 O 3 system, which was responsible for high mobility of holes, then lowering the electron-hole recombination, and finally improving the photocatalytic performance of Bi 2 O 3 significantly. © 2015 Elsevier B.V. All rights reserved.
语种：
英文
展开
Facile Synthesis of Carbon Spheres with Uniformly Dispersed MnO Nanoparticles for Lithium Ion Battery Anode
作者：
Hu, Hao;Cheng, Haoyan;Liu, Zhengfei;Yu, Ying*
期刊：
Electrochimica Acta ,2015年152:44-52 ISSN：0013-4686
通讯作者：
Yu, Ying
作者机构：
[Hu, Hao; Cheng, Haoyan; Liu, Zhengfei; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
MnO nanoparticle;Carbon matrix;Anode;Lithium-ion battery;Uniform dispersion
摘要：
MnO nanoparticles with diameter about 5 nm are uniformly dispersed within a spherical carbon matrix by an in-situ adsorption approach. This unique nanostructure with rational design and engineering not only possesses large elastic buffering space to prevent MnO nanoparticles from agglomeration, but also improves lithium-storage properties because the carbon matrix provides continuous path for Li-ion and electron diffusion inside the composite spheres. The cell assembled with the nanostructure composite exhibits high reversible specific capacity of 501 mAh/g ( exceeding pure MnO particles of 199 mAh/g) after 300 cycles at 0.5 A/g, excellent cycling stability with 81% capacity retention after 300 cycles, and enhanced rate performance up to 161 mAh/g at 5 A/g with only 13% capacity fade after 200 cycles. Due to the scale-producible fabrication steps under low temperature for this approach, the method can be used for the preparation of other nanostructures with high performance. (C) 2014 Elsevier Ltd. All rights reserved.
语种：
英文
展开
Facet-level mechanistic insights into general homogeneous carbon doping for enhanced solar-to-hydrogen conversion
作者：
Li, Jie* ;Zhao, Kun;Yu, Ying;Zhang, Lizhi
期刊：
Advanced Functional Materials ,2015年25(14):2189-2201 ISSN：1616-301X
通讯作者：
Li, Jie
作者机构：
[Zhang, Lizhi; Li, Jie; Zhao, Kun] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Li, Jie] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
关键词：
BiOCl;carbon doping;facet exposure;photocatalysis;solar-to-hydrogen conversion
摘要：
Homogeneous doping can boost solar-to-hydrogen conversion and therefore attracts great attention. Although a great deal of effort has been made to explore the doping-photoreactivity relationship, the doping mechanisms, especially from the perspective of crystal facets, are seldom explored. In this study, a general homogeneous carbon doping strategy is established and then serves as the doping model for a mechanistic investigation, as encouraged by its versatility in enabling homogeneous incorporation of carbon and improving solar-to-hydrogen conversion for typical oxides including TiO2, ZnO, and BiOCl. Using well-defined BiOCl nanosheets of high {001} or {010} facet exposure, we clarify the homogeneous carbon doping mechanism at the level of crystal facets for the first time. This mechanism involves the initial facet-dependent adsorption of the dopant precursor, regulated by the surface atomic structures, and the subsequent facet-dependent diffusion of carbon dopants associated with the facet-related arrangements of bulk atoms. This results in facet-dependent carbon doping behavior and a dopant-concentration-dependent solar-to-hydrogen conversion property of BiOCl nanosheets. These mechanistic insights also suggest that the implantation of the dopant precursor in the shallow lattice of host nanocrystal is vital for the effective homogeneous doping. This new doping model is different from the conventional counterpart based on the organic ligands or gas molecules adsorption onto the surface of host nanocrystals, where surface doping usually occurs. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种：
英文
展开
