Enhanced photocatalytic activity and stability of interstitial Ga-doped CdS: Combination of experiment and calculation
作者：
Yang, Jianhua;Liu, Rujun;Huang, Sheng;Shao, Yu;Huang, Yuan;...
期刊：
Catalysis Today ,2014年224:104-113 ISSN：0920-5861
通讯作者：
Yu, Ying
作者机构：
[Liu, Rujun; Yang, Jianhua; Huang, Sheng; Yu, Ying; Huang, Yuan] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Shao, Yu] Univ Sci & Technol China, Coll Mat Sci & Engn, Anhua 230026, 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.
会议名称：
4th International Symposium on Environmental Science and Technology (ISEST)
会议时间：
JUN 04-07, 2013
会议地点：
Dalian, PEOPLES R CHINA
会议主办单位：
[Yang, Jianhua;Liu, Rujun;Huang, Sheng;Huang, Yuan;Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.^[Shao, Yu] Univ Sci & Technol China, Coll Mat Sci & Engn, Anhua 230026, Peoples R China.
关键词：
Activity and stability improvement;Ga-doped CdS;Semiconductor photocatalysts;Theoretical calculation
摘要：
Herein, a series of Ga-doped CdS photocatalysts are successfully prepared by simple solvothermal method using absolute ethyl alcohol as only reaction solvent. The samples have been characterized by X-ray diffraction, scanning electron microscope, UV-vis diffuse reflectance spectrum, X-ray photoelectron spectroscopy and electrochemical measurements. Their photocatalytic activity has been evaluated by the photocatalytic degradation of rhodamine B (RhB) under simulated visible-light irradiation. It is found that the prepared samples are interstitial Ga-doped CdS, which has never been reported before. The photocatalytic activity of Ga-doped CdS with molar ratio of Ga:Cd = 1:50 for RhB degradation can be enhanced by 114% in comparison with that of pure CdS under same reaction conditions. All of the data based on theoretical calculation and experiment indicate that Ga ion doped into the interstice of crystal lattice in CdS can not only lower the valence band position but also decrease the formation energy of the CdS samples. What is more, Ga ion doping can widen the valence band of CdS semiconductor, which is quite beneficial for the separation of photo-generated carriers. As a result, the Ga-doped CdS not only has improved photocatalytic activity for the degradation of pollutant pollutants but also has enhanced stability under visible-light irradiation. In a word, Ga-doped CdS will be a promising photocatalyst with richly potential application prospect under solar light. © 2013 Elsevier B.V.
语种：
英文
展开
Characterization and high pollutant removal ability of buoyant (C, N)-TiO2/PTFE flakes prepared by high-energy ball-milling
作者：
Zhong, Wei* ;Yu, Ying;Du, Chun;Li, Wei;Wang, Yinzhen;...
期刊：
RSC Advances ,2014年4(75):40019-40028 ISSN：2046-2069
通讯作者：
Zhong, Wei
作者机构：
[Zhong, Wei; Wang, Yinzhen; Du, Chun; Xie, Yuandong; Li, Wei; He, Qinyu; He, Guannan] S China Normal Univ, Sch Phys & Telecommun Engn, Adv Mat Lab, Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Guangdong, Peoples R China.;[Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhong, Wei] S;S China Normal Univ, Sch Phys & Telecommun Engn, Adv Mat Lab, Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Guangdong, Peoples R China.
摘要：
Buoyant photocatalysts which are able to remove organic pollutants under all lighting and weather conditions are in demand for the treatment of large volumes of organic wastewater. Buoyant carbon and nitrogen co-doped TiO<inf>2</inf>/polytetrafluoroethylene (NCT/PTFE) flakes which meet these requirements were prepared by the high-energy ball-milling of NCT powder and PTFE. The physicochemical properties of the as-prepared composite flakes were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflection spectroscopy (UV-vis DRS), Brunauer-Emmett-Teller (BET) surface area determination, and X-ray photoelectron spectroscopy (XPS), as well as electrical conductivity and density measurements. The density of the composite flakes was 0.93 g cm<sup>-3</sup>, slightly lower than that of water, rendering them buoyant. And the used-and- regenerated (by UV-vis irradiation for 8 h) flakes are also buoyant. Adsorption in the dark and photodegradation experiments indicated that the as-prepared flakes have high dark adsorption and high photocatalytic properties. The 6 h photodegradation ratio of methylene orange (20 mg L<sup>-1</sup>, 100 mL, as a model dye) is 96.6%, and a close degradation ratio of 97% can be obtained by three-cycle dark adsorption with minor stirring (1 cycle includes 8 h dark adsorption followed by 8 h regeneration by UV-vis irradiation per cycle). The high adsorption and good photocatalytic properties can be mainly attributed to the large BET surface area resulting from the small NCT particle size. The as-prepared flakes have the potential for use in organic pollutant adsorption at any time and can be regenerated through light irradiation when sunlight is available. This kind of environmental protection material has great practical significance due to its low cost, simple preparation, thermal durability, highly efficient organic pollutant removal, large-volume treatment capacity, recyclability, and the possibility of working at any time. This journal is ©the Partner Organisations 2014.
语种：
英文
展开
Conversion of Methane to Methanol with a Bent Mono(mu-oxo)dinickel Anchored on the Internal Surfaces of Micropores
作者：
Shan, Junjun;Huang, Weixin;Luan Nguyen;Yu, Ying;Zhang, Shiran;...
期刊：
LANGMUIR ,2014年30(28):8558-8569 ISSN：0743-7463
通讯作者：
Tao, Franklin (Feng)
作者机构：
[Shan, Junjun; Luan Nguyen; Huang, Weixin; Zhang, Shiran; Tao, Franklin (Feng)] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA.;[Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Li, Yuanyuan; Frenkel, Anatoly I.] Yeshiva Univ, Dept Phys, New York, NY 10000 USA.
通讯机构：
[Tao, Franklin (Feng)] U;Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA.
摘要：
The oxidation of methane to methanol is a pathway to utilizing this relatively abundant, inexpensive energy resource. Here we report a new catalyst, bent mono(μ-oxo)dinickel anchored on an internal surface of micropores,which is active for direct oxidation. It is synthesized from the direct loading of a nickel precursor to the internal surface of micropores of ZSM5 following activation in O<inf>2</inf>. Ni 2p<inf>3/2</inf> of this bent mono(μ-oxo)dinickel species formed on the internal surface of ZSM5 exhibits a unique photoemission feature, which distinguishes the mono(μ-oxo)dinickel from NiO nanoparticles. The formation of the mono(μ-oxo)dinickel species was confirmed with X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). This mono(μ-oxo)dinickel species is active for the direct oxidation of methane to methanol under the mild condition of a temperature as low as 150 °C in CH<inf>4</inf> at 1 bar. In-situ studies using UV-vis, XANES, and EXAFS suggest that this bent mono(μ-oxo)dinickel species is the active site for the direct oxidation of methane to methanol. The energy barrier of this direct oxidation of methane is 83.2 kJ/mol. ©2014 American Chemical Society.
语种：
英文
展开
Surface structure and chemistry of Pt/Cu/Pt(1 1 1) near surface alloy model catalyst in CO
作者：
Zeng, Shibi;Luan Nguyen;Cheng, Fang;Liu, Lacheng;Yu, Ying* ;...
期刊：
Applied Surface Science ,2014年320:225-230 ISSN：0169-4332
通讯作者：
Yu, Ying
作者机构：
[Zeng, Shibi; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Zeng, Shibi; Luan Nguyen; Tao, Franklin (Feng); Cheng, Fang] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA.;[Liu, Lacheng] Nanchang Univ, Dept Phys, Nanchang 350000, 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：
Alloy;Pt(1 1 1);Surface chemistry;Surface structure
摘要：
Near surface alloy (NSA) model catalyst Pt/Cu/Pt(1 1 1) was prepared on Pt(1 1 1) through a controlled vapor deposition of Cu atoms. Different coordination environments of Pt atoms of the topmost Pt layer with the underneath Cu atoms in the subsurface result in different local electronic structures of surface Pt atoms. Surface structure and chemistry of the NAS model catalyst in Torr pressure of CO were studied with high pressure scanning tunneling microscopy (HP-STM) and ambient pressure X-ray photoelectron spectroscopy (AP-XPS). In Torr pressure of CO, the topmost Pt layer of Pt/Cu/Pt(1 1 1) is restructured to thin nanoclusters with size of about 1 nm. Photoemission feature of O 1s of CO on Pt/Cu/Pt(1 1 1) suggests CO adsorbed on both edge and surface of these formed nanoclusters. This surface is active for CO oxidation. Atomic layers of carbon are formed on Pt/Cu/Pt(1 1 1) at 573 K in 2 Torr of CO.
语种：
英文
展开
TiO2 mesoporous microspheres with nanorod structure: facile synthesis and superior electrochemical performance
作者：
Gao, Lin;Li, Xiangru;Hu, Hao;Li, Guojian;Liu, Haowen* ;...
期刊：
Electrochimica Acta ,2014年120:231-239 ISSN：0013-4686
通讯作者：
Liu, Haowen
作者机构：
[Li, Guojian; Li, Xiangru; Hu, Hao; Yu, Ying; Gao, Lin] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan, Peoples R China.;[Liu, Haowen] South Cent Univ Nationalities, Coll Chem & Mat Sci, Beijing, Peoples R China.
通讯机构：
[Liu, Haowen] S;South Cent Univ Nationalities, Coll Chem & Mat Sci, Beijing, Peoples R China.
关键词：
TiO_2 mesoporous microsphere;Nanorrod surface;Electrochemical property;Carbon coating
摘要：
A facile solvothermal treatment without any template is employed to synthesize TiO2 mesoporous microspheres with nanorod structure. The post-calcination of the microsphere sample at 500 C with carbon source leads to the formation of C-coated TiO2 with the same structure. All of the prepared samples have been characterized by the techniques of X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Additionally, N2 adsorption-desorption isotherm curves have been depicted to show the tunable mesopores and high specific surface area of the prepared pure and C-coated TiO2. A growth scheme is also proposed to elucidate the formation process of the mesoporous microspheres with nanorods on the surface. The electrochemical results show that both of the prepared samples have better electrochemical performance than commercial anatase TiO2 due to the nanorod and mesoporous structures, which provides direct and open channals for efficient Li+ ion diffusion. Moreover, the prepared C-coated TiO2 has superior rate property and cycling performance with specific capacity of 157.4 mAh g-1 at 1C rate even after 200 cycles. The galvanostatic charge-discharge voltage indicates that the C-coated TiO 2 with improved electronic conductivity has the broadest voltage platform comparable to Li4Ti5O12. Therefore, the C-coated TiO2 with mesoporous microspheres and nanorod structure can be an attractive candidate as functional anode materials. © 2013 Elsevier Ltd.
语种：
英文
展开
缺陷与掺杂对CdS光催化特性影响的第一性原理研究
作者：
刘如军;余颖
作者机构：
[刘如军; 余颖] 湛江师范学院信息科学与技术学院;[刘如军; 余颖] 华中师范大学纳米科技研究院
会议名称：
中国化学会第十二届全国量子化学会议
会议时间：
2014-01-01
会议地点：
中国山西太原
会议论文集名称：
中国化学会第十二届全国量子化学会议论文摘要集
摘要：
为提高半导体Cd S的光催化活性和稳定性,研究了基于密度泛函理论的空位及金属掺杂对Cd S的光学特性及其稳定性的影响。计算结果表明,S空位的引入可引起Cd S带隙变宽,产生吸收光谱蓝移,使Cd S可见光稳定性有所提高;而掺杂Ga则可令价带有所下移,Cd S氧化降解有机污染物能力增强。研究表明,通过引入适当浓度S空位和金属掺杂,可促进Cd S的光催化活性及其稳定性。
语种：
中文
展开
Application of flower-like SnS2 nanoparticles for direct electrochemistry of hemoglobin and its electrocatalysis
作者：
Zeng, Yan;Li, Wei;Zhang, Huanhuan;Wu, Xu;Sun, Wei;...
期刊：
ANALYTICAL METHODS ,2014年6(2):404-409 ISSN：1759-9660
通讯作者：
Zhu, Zhihong
作者机构：
[Wu, Xu; Zhu, Zhihong; Li, Wei; Yu, Ying; Zeng, Yan; Zhang, Huanhuan] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Sun, Wei] Hainan Normal Univ, Coll Chem & Chem Engn, Haikou 571158, Peoples R China.
通讯机构：
[Zhu, Zhihong] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
Flower-like SnS2 nanoparticles were synthesized through a hydrothermal process. By combing with hemoglobin (Hb) and the ionic liquid (IL) 1-butyl-3-methyl-imidazolium tetrafluoroborate ([BMIM]BF4), a composite biomaterial was fabricated and further used to modify a carbon ionic liquid electrode (CILE) with Nafion as a film-forming material. FT-IR and UV-Vis spectroscopic results showed that Hb retained its native structure in the composite. With the synergistic effects of the SnS2 nanoflower and IL, a couple of well-defined redox peaks of Hb appeared in the cyclic voltammogram of Nafion/Hb-SnS2-IL/CILE, which indicated that direct electron transfer between Hb and the underlying electrode was realized. The electrochemical behavior of Hb on the modified electrode was investigated by cyclic voltammetry with the electrochemical parameters such as electron transfer coefficient (α), electron transfer number (n) and heterogeneous electron transfer rate constant (ks) calculated. The fabricated electrode showed good electrocatalytic ability for the reduction of trichloroacetic acid (TCA) with a wider linear range from 0.8 to 21.0 mM and a lower detection limit of 0.27 mM (S/N = 3), indicating its potential application for the construction of a novel third-generation electrochemical biosensor. © 2014 The Royal Society of Chemistry.
语种：
英文
展开
Combination study of DFT calculation and experiment for photocatalytic properties of S-doped anatase TiO2
作者：
Liu, Rujun;Zhou, Xiaosong;Yang, Fan;Yu, Ying*
期刊：
Applied Surface Science ,2014年319(1):50-59 ISSN：0169-4332
通讯作者：
Yu, Ying
作者机构：
[Liu, Rujun; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Liu, Rujun] Lingnan Normal Univ, Sch Informat Sci & Technol, Zhanjiang 524048, Peoples R China.;[Zhou, Xiaosong] Lingnan Normal Univ, Dev Ctr New Mat Engn & Technol Univ Guangdong, Sch Chem & Technol, Zhanjiang 524048, Peoples R China.;[Yang, Fan] Wuhan Text Univ, Sch Elect & Elect Engn, Wuhan 430073, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Bader analysis;ELF;S-dopedTiO 2;Visible lightDFT
摘要：
Although there are many publications about S-doped TiO 2 , the related mechanism is still not well elu-cidated. In order to investigate the origin and trend of S substituting for O in TiO 2 crystal lattice withproper dopant concentration, a combination of DFT calculation and experiment was used. Bader chargeand electronic location function analysis indicate that the largely ionic character between Ti and S bond-ing in titanium dioxide decreases and there is free electron gas like behavior around S and neighbor Tifor the S-doped anatase TiO 2 . From DFT calculation, ST2.78 model is found to stabilize the structure ofS substitution for lattice O with lower formation energy and its absorbance in visible light increases.Experiment results demonstrate that the sulfur doping results in the shift of the absorption edge for TiO 2 to lower energy region, which leads to the nanoparticles active within the wavelength range of 650 nm. © 2014 Elsevier B.V. All rights reserved.
语种：
英文
展开
Bismuth oxyhalide nanomaterials: Layered structures meet photocatalysis
作者：
Li, Jie;Yu, Ying;Zhang, Lizhi*
期刊：
Nanoscale ,2014年6(15):8473-8488 ISSN：2040-3364
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Jie; Yu, Ying] 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.
摘要：
In recent years, layered bismuth oxyhalide nanomaterials have received more and more interest as promising photocatalysts because their unique layered structures endow them with fascinating physicochemical properties; thus, they have great potential photocatalytic applications for environment remediation and energy harvesting. In this article, we explore the synthesis strategies and growth mechanisms of layered bismuth oxyhalide nanomaterials, and propose design principles of tailoring a layered configuration to control the nanoarchitectures for high efficient photocatalysis. Subsequently, we focus on their layered structure dependent properties, including pH-related crystal facet exposure and phase transformation, facet-dependent photoactivity and molecular oxygen activation pathways, so as to clarify the origin of the layered structure dependent photoreactivity. Furthermore, we summarize various strategies for modulating the composition and arrangement of layered structures to enhance the photoactivity of nanostructured bismuth oxyhalides via internal electric field tuning, dehalogenation effect, surface functionalization, doping, plasmon modification, and heterojunction construction, which may offer efficient guidance for the design and construction of high-performance bismuth oxyhalide-based photocatalysis systems. Finally, we highlight some crucial issues in engineering the layered-structure mediated properties of bismuth oxyhalide photocatalysts and provide tentative suggestions for future research on increasing their photocatalytic performance.
语种：
英文
展开
Ultraporous interweaving electrospun microfibers from PCL-PEO binary blends and their inflammatory responses
作者：
Li, Yan-Fang;Rubert, Marina;Aslan, Husnu;Yu, Ying;Howard, Kenneth A.;...
期刊：
Nanoscale ,2014年6(6):3392-3402 ISSN：2040-3364
通讯作者：
Chen, Menglin
作者机构：
[Li, Yan-Fang; Rubert, Marina; Chen, Menglin; Besenbacher, Flemming; Dong, Mingdong; Howard, Kenneth A.; Aslan, Husnu] Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark.;[Li, Yan-Fang; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Chen, Menglin] A;Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark.
摘要：
Production of one dimensional nanomaterials with secondary morphology exhibiting unique functions is challenging. Here we report for the first time that a nanoscale immiscible polymer blend solution electrojet can assemble into ultraporous interweaving microfibers. This intriguingly novel morphology originated from a blend of polycaprolactone (PCL) and polyethylene oxide (PEO) in a DCM-DMF mixed solution when the ratio between each component reached a threshold and when the electrospinning parameters were delicately controlled. The morphology, crystallinity, surface chemistry and wettabilities were characterized to understand the mechanism of formation. The interplay of the two semi-crystalline polymers and the pair of solvents/non-solvents with the electrospinning processing parameters was found to be critical for the formation of the unique structure. Furthermore, the interesting combination of biocompatible, biodegradable PCL with protein-resistant PEO motivated us to assess its inflammation responses on the RAW 264.7 macrophage cell line. All fibers were found to be biocompatible with low inflammation potential upon incubation, while compared with pure PCL nanofibers;the unique interweaving microfibers induced a slightly higher inflammatory reaction. This journal is ©The Royal Society of Chemistry.
语种：
英文
展开
TiO2与TiO2@C花状微球制备及其电化学性能研究
作者：
高林;余颖
作者机构：
华中师范大学纳米科技研究院,武汉430079
会议名称：
湖北省物理学会、武汉物理学会2013年学术年会
会议时间：
2013-08-01
会议地点：
湖北恩施
会议论文集名称：
湖北省物理学会、武汉物理学会2013年学术年会论文集
关键词：
电池负极材料;二氧化钛;花状微球;制备工艺;电化学性能
摘要：
TiO2作为一种环境友好,价格低廉并且制备工艺简单的材料在光催化,太阳能电池,锂离子电池等领域被广泛运用。锐钛矿TiO2因为其较低的锂离子充放电电压平台(～1.75V),相比于商业化的负极碳材料不会在表面沉积锂晶枝,具有更好的安全性能,并且相比于其它的金属氧化物如SnO2、CoO、Co3O4等具有更好的高倍率充放电性能,另外其形貌较易调控并且制备方法灵活简便,因此最近关于以锐钛矿TiO2作为负极材料的研究相当热门。由于形貌是影响材料电化学性能的最主要的因素之一,制备出高比表面积的锐钛矿TiO2并用作负极材料一直是国内外研究的热点。本文利用一步水热法制备出了花状TiOz，分别在空气和氮气气氛下锻烧1h，得到了锐钦矿Ti02和碳包覆的锐钦矿TiO2(TiO2@C)花状微球。分别对制备出的TiO2和TiO2@C进行XRD,SEM,TEM,TGA,BET等表征并进行电化学性能测试。
语种：
中文
展开
Sand flower layered double hydroxides synthesized by co-precipitation for CO2 capture: Morphology evolution mechanism, agitation effect and stability
作者：
Zeng, Shibi;Xu, Xiaoli;Wang, Shangkun;Gong, Qiankun;Liu, Rujun;...
期刊：
Materials Chemistry and Physics ,2013年140(1):159-167 ISSN：0254-0584
通讯作者：
Yu, Ying
作者机构：
[Zeng, Shibi; Liu, Rujun; Yu, Ying; Xu, Xiaoli; Gong, Qiankun; Wang, Shangkun] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Nanostructures;Chemical synthesis;Electron microscopy;Adsorption
摘要：
Magnesium-aluminum layered double oxides (Mg-Al-LDO) derived from calcination of layered double hydroxides (LDH) is one of the most capable candidates for CO<inf>2</inf> capture. LDHs with sand flower and dense layered morphology are prepared by co-precipitation method at pH = 10 under different condition with and without stirring. The sand flower LDH prepared with stirring has better CO<inf>2</inf> adsorption performance. Additionally, the sand flower morphology under calcination can be preserved very well, while the morphology can only remain stable below 100 C after hydrothermal treatment and reconstruction. The formation process of the sand flower LDH is investigated in detail and the related morphology evolution mechanism is proposed. This study can provide insight into the effect of mechanical interaction on chemical reaction and give a new way to control the morphology of layered materials. ©2013 Elsevier B.V. All rights reserved.
语种：
英文
展开
Synthesis of Bi2O3/Cu2O nanoflowers by hydrothermal method and its photocatalytic activity enhancement under simulated sunlight
作者：
Abdulkarem, A. M.;Aref, A. A.;Abdulhabeeb, A.;Li, Yan-Fang;Yu, Ying*
期刊：
Journal of Alloys and Compounds ,2013年560:132-141 ISSN：0925-8388
通讯作者：
Yu, Ying
作者机构：
[Li, Yan-Fang; Abdulkarem, A. M.; Abdulhabeeb, A.; Yu, Ying; Aref, A. A.] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Chemical synthesis;Nanostructures;Semiconductors
摘要：
Bi<inf>2</inf>O<inf>3</inf>/Cu<inf>2</inf>O nanoflower composites are successfully synthesized via simple hydrothermal method at low temperature. The effect of calcination on their properties has been explored as well. The prepared samples have been characterized by X-ray diffraction, scanning electron microscopy, UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity is tested by rhodamine-B degradation under simulated sunlight and the mechanism for the activity enhancement compared with pure Bi<inf>2</inf>O <inf>3</inf> is investigated in detail. The results show that the prepared samples are monoclinic and have high crystallinity. After annealing, δ-Bi<inf>2</inf>O<inf>3</inf> phase is converted to Bi<inf>2</inf>O <inf>3</inf> and Bi<inf>2</inf>O<inf>3</inf>/Cu<inf>2</inf>O composite is formed. Additionally, the band gap of the prepared samples decreases from 3.55 to 2.71 eV. The photocatalytic activities of the flower-like samples are in the order of Bi<inf>2</inf>O<inf>3</inf>/Cu<inf>2</inf>O >δ-Bi <inf>2</inf>O<inf>3</inf> >Bi<inf>2</inf>O<inf>3</inf>. The synergistic effect of the crystal and electronic structures on the photocatalytic activity of Bi<inf>2</inf>O<inf>3</inf>/Cu<inf>2</inf>O composite is proposed. The higher photocatalytic activity of the samples can be closely related to their smaller band gap, higher crystallinity and unique tunnel structure. Substantially, the activity enhancement is also attributed to the special electron structure of the composite, which leads to the important role of photogenerated electron transfer. ©2013 Elsevier B.V. All rights reserved.
语种：
英文
展开
CdS-based semiconductor photocatalysts for hydrogen production from water splitting under solar light
作者：
Huang, Sheng* ;Lin, Yu;Yang, Jian-Hua;Yu, Ying
期刊：
ACS Symposium Series ,2013年1140:219-241 ISSN：0097-6156
通讯作者：
Huang, Sheng
作者机构：
[Huang, Sheng; Lin, Yu; Yu, Ying; Yang, Jian-Hua] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
通讯机构：
[Huang, Sheng] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
会议名称：
Symposium on Nanotechnology for a Sustainable Energy Economy / 243rd National Spring Meeting of the American-Chemical-Society (ACS)
会议时间：
MAR 25-29, 2012
会议地点：
San Diego, CA
会议主办单位：
[Huang, Sheng;Lin, Yu;Yang, Jian-Hua;Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
会议论文集名称：
ACS Symposium Series
摘要：
Energy crisis around the world pushes people to take advantage of renewable energy. As one kind of photosynthesis, H2 evolution from water splitting through solar light attracts a lot of interest. Herein, this article will introduce recently published CdS-based semiconductors for photocatalytic hydrogen evolution from water splitting under solar light. The activity and stability of different CdS-based photocatalysts including CdS with different nanostructures, CdS composites with other semiconductor, polymer or high surface area materials will be described and compared. The function of deposited cocatalysts and sacrificial reagents will be also introduced for the improvement of activity and stability for CdS. The prospective trend in this research area will be proposed as well. Summarily, by means of the nanostructure change and hybridization modification, the activity of CdS for hydrogen production and the corresponding quantum efficiency can be enhanced intensely and the stability can be improved as well. We hope the review will inspire people new good ideas and thus facilitate CdS-based photocatalysts moving forward to practical application in future. © 2013 American Chemical Society.
语种：
英文
展开
Enhanced photocatalytic activity and stability of semiconductor by Ag doping and simultaneous deposition: the case of CdS
作者：
Huang, Sheng;Lin, Yu;Yang, Jianhua;Li, Xiangru;Zhang, Jun;...
期刊：
RSC Advances ,2013年3(43):20782-20792 ISSN：2046-2069
通讯作者：
Yu, Ying
作者机构：
[Li, Xiangru; Huang, Sheng; Lin, Yu; Yang, Jianhua; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Yu, Jiaguo; Zhang, Jun] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China.;[Wang, Wenzhong; Shi, Honglong] Minzu Univ China, Sch Sci, Beijing 100081, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
摘要：
Herein, it is demonstrated how the photocatalytic activity and stability of a semiconductor can be enhanced through metal doping and simultaneous deposition in the case of CdS. The CdS which is doped and simultaneously deposited by Ag (denoted as Ag-CdS thereafter) is successfully prepared by a one-step hydrothermal method. The prepared Ag-CdS samples have enhanced photocatalytic activity under simulated sunlight compared with pure CdS and Ag-deposited CdS for organic pollutant degradation and H<inf>2</inf>production from water splitting. The main reason for the enhanced activity is due to the fast transfer of photogenerated electrons from the conduction band of CdS to Ag nanoparticles on the surface, which suppresses the recombination of photogenerated electrons and holes. As for the enhanced stability of the Ag-CdS sample, the doping with Ag creates an acceptor energy level near the valence band of CdS. The holes will inject into the acceptor energy level freely, leading to the weak oxidative ability of holes in the excited semiconductor. Moreover, the more stable and more easily formed chemical bond between Ag<sup>+</sup>substituted for Cd<sup>2+</sup>and S<sup>2+</sup>makes the sample more stable than Ag-deposited CdS. The Ag-CdS photocatalyst with high activity and stability can be used in future applications. ©The Royal Society of Chemistry 2013.<br/>
语种：
英文
展开
Photocatalytic activity enhancement of CdS through In doping by simple hydrothermal method
作者：
Abdulkarem, A. M.;Elssfah, E. M.;Yan, Nan-Nan;Demissie, G.;Yu, Ying*
期刊：
Journal of Physics and Chemistry of Solids ,2013年74(4):647-652 ISSN：0022-3697
通讯作者：
Yu, Ying
作者机构：
[Demissie, G.; Abdulkarem, A. M.; Yu, Ying; Elssfah, E. M.; Yan, Nan-Nan] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
A. Nanostructures;B. Chemical synthesis;D. Optical properties
摘要：
In doped CdS has been prepared by simple hydrothermal method and characterized by X-ray diffraction, scanning electron microscopy, UV–vis spectrometer, and X-ray photoelectron spectroscopy techniques. The photocatalytic activity of the prepared samples was tested by Rhodamine B degradation under simulated solar light with the comparison of pure CdS sample. The results show that all the prepared samples have fine crystallinity, and In3+/Cd2+ molar ratio greatly affects the morphology and photocatalytic activity of the samples. In doped CdS reveals enhanced photocatalytic activity compared with pure CdS. As for the photocatalytic mechanism of Rh-B over the prepared sample, hole and electron are responsible for the photocatalytic degradation and OH does not have strong contribution. So, hole and electron may not get converted to OH for Rh-B degradation. The as-prepared nanostructure samples may have application potential for environmental purification due to their high photocatalytic activity.
语种：
英文
展开
纳米二氧化锆超细颗粒物对KB细胞活性的影响
作者：
晏彪;胡浩;陈绍恢;刘旭东;闵安娜;...
期刊：
公共卫生与预防医学 ,2013年24(3):5-8 ISSN：1006-2483
作者机构：
华中师范大学生命科学学院,遗传调控与整合生物学湖北省重点实验室,武汉430079;华中师范大学物理与纳米技术学院
关键词：
纳米氧化锆;KB细胞;生物相容性;MTT法
摘要：
目的评估纳米二氧化锆（nano-ZrO2）对人类口腔细胞活性的影响。方法采用不同浓度的纳米ZrO2颗粒（0、10、30、60、100、150、250μg.ml-1）对Human epidermoid carcinoma（KB）细胞分别进行24、48、72 h的染毒,应用MTT法检测细胞活性。结果①24、48 h低浓度纳米ZrO2染毒时KB细胞活性较高;②24、48 h高浓度nano-ZrO2染毒时没有对KB细胞的活性产生明显影响;③染毒72 h之后KB细胞活性没有发生显著变化,nano-ZrO2对KB细胞也不具有细胞毒性。结论在适当浓度下,nano-ZrO2对KB细胞活性无明显毒作用。
语种：
中文
展开
Nano-sized Li4 Ti5 O12 anode material with excellent performance prepared by solid state reaction: The effect of precursor size and morphology
作者：
Li, Xiangru;Hu, Hao;Huang, Sheng;Yu, Gaige;Gao, Lin;...
期刊：
Electrochimica Acta ,2013年112:356-363 ISSN：0013-4686
通讯作者：
Yu, Ying
作者机构：
[Li, Xiangru; Hu, Hao; Huang, Sheng; Yu, Ying; Gao, Lin] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan, Peoples R China.;[Liu, Haowen; Yu, Gaige] South Cent Univ Nationalities, Coll Chem & Mat Sci, Changsha, Hunan, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan, Peoples R China.
会议名称：
12th International Fischer Symposium
会议时间：
JUN 03-07, 2012
会议地点：
Lubeck, GERMANY
会议主办单位：
[Li, Xiangru;Hu, Hao;Huang, Sheng;Gao, Lin;Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan, Peoples R China.^[Yu, Gaige;Liu, Haowen] South Cent Univ Nationalities, Coll Chem & Mat Sci, Changsha, Hunan, Peoples R China.
关键词：
Solid state reaction;Precursors;Spinel lithium titanate;Electrochemical performance;Capacity fading
摘要：
Spinel nano-sized Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> anode material of secondary lithium-ion battery has been successfully prepared by solid state reaction using axiolitic TiO<inf>2</inf> assembled by 10-20 nm nanoparticles and Li<inf>2</inf>CO<inf>3</inf> as precursors. The synthesis condition, grain size effect and corresponding electrochemical performance of the special Li <inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> have been studied in comparison with those of the normal Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> originated from commercial TiO<inf>2</inf>. We also propose the mechanism that using the nano-scaled TiO<inf>2</inf> with special structure and unexcess Li <inf>2</inf>CO<inf>3</inf> as precursors can synthesize pure phase nano-sized Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> at 800 C through solid state reaction. The prepared nano-sized Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> anode material for Li-ion batteries shows excellent capacity performance with rate capacity of 174.2, 164.0, 157.4, 146.4 and 129.6 mA h g<sup>-1</sup> at 0.5, 1, 2, 5 and 10 C, respectively, and capacity retention of 95.1% after 100 cycles at 1 C. In addition, the specific capacity fade for the cell with the different Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> active materials resulted from the increase of internal resistance after 100 cycles is compared. ©2013 Elsevier Ltd. All rights reserved.
语种：
英文
展开
New way for CO2 reduction under visible light by combination of Cu electrode and semiconductor thin film: Cu2O conduction type effect, conversion efficiency and stability enhancement
作者：
Li-Li Yan;Xiang-Jun Xia;Xin Ba;Sheng Huang;Xi Li;...
作者机构：
[Li-Li Yan; Xiang-Jun Xia; Xin Ba; Sheng Huang; Ying Yu] Institute of Nanoscience and Nanotechnology,Central China Normal University,Wuhan 430079,China;[Xi Li] Department of Environmental Science and Engineering,Fudan University,Shanghai 200433,China
会议名称：
第五届世界氢能技术大会(WHTC2013)
会议时间：
2013-9-25
会议地点：
上海
会议主办单位：
中国可再生能源学会
会议论文集名称：
第五届世界氢能技术大会(WHTC2013)论文集
摘要：
How to take advantage of CO2 has been one of the main issues to be addressed around the world.Although there are many methods to convert CO2 to organic fuel,the efficiency is still not high enough for practical application.Herein,we have accomplished better conversion of CO2 by the combination of metal electrode and semiconductor thin film responsive to visible light.
语种：
英文
展开
Neodymium-Doped TiO2 with Anatase and Brookite Two Phases: Mechanism for Photocatalytic Activity Enhancement under Visible Light and the Role of Electron
作者：
Nassoko, Douga;Li, Yan-Fang;Li, Jia-Lin;Li, Xi;Yu, Ying*
期刊：
International Journal of Photoenergy ,2012年2012:- ISSN：1110-662X
通讯作者：
Yu, Ying
作者机构：
[Li, Yan-Fang; Li, Jia-Lin; Nassoko, Douga; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Li, Xi] Jiangsu Huannengtong Environm Protect Co Ltd, Zhenjiang 212006, Peoples R China.;[Li, Xi] Zhenjiang King Lithium Cell Co Ltd, Zhenjiang 212006, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
Titanium dioxide (TiO2) doped with neodymium (Nd), one rare earth element, has been synthesized by a sol-gel method for the photocatalytic degradation of rhodamine-B under visible light. The prepared samples are characterized by X-ray diffractometer, Raman spectroscopy, UV-Vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller measurement. The results indicate that the prepared samples have anatase and brookite phases. Additionally, Nd as Nd3+ may enter into the lattice of TiO2 and the presence of Nd3+ substantially enhances the photocatalytic activity of TiO2 under visible light. In order to further explore the mechanism of photocatalytic degradation of organic pollutant, photoluminescence spectrometer and scavenger addition method have been employed. It is found that hydroxide radicals produced by Nd-doped TiO2 under visible light are one of reactive species for Rh-B degradation and photogenerated electrons are mainly responsible for the formation of the reactive species.
语种：
英文
展开
