超细ZnFe_2O_4纳米晶与蛋白质的相互作用
作者:
Li Qiang;Ji Xiao-Xu;Zhong Qin;Huang Xin-Tang* ;Xiong Li
期刊:
无机化学学报 ,2013年29(11):2375-2381 ISSN:1001-4861
通讯作者:
Huang Xin-Tang
作者机构:
[Li Qiang; Huang Xin-Tang] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Ji Xiao-Xu] Nanyang Normal Univ, Sch Phys & Elect Engn, Nanyang 473061, Henan, Peoples R China.;[Xiong Li; Zhong Qin] Cent China Normal Univ, Coll Life Sci, Hubei Key Lab Genet Regulat & Integrat Biol, Wuhan 430079, Peoples R China.
通讯机构:
[Huang Xin-Tang] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词:
ZnFe_2O_4纳米晶;牛血红蛋白;相互作用
摘要:
水热法制备了超细ZnFe_2O_4纳米晶,并通过高分辨透射电镜(HRTEM)、XRD和EDX技术对其进行了表征。以牛血清白蛋白(Bovine Serum Albumin,BSA)和牛血红蛋白(Hemoglobin)为模式蛋白,研究了纳米晶在不同pH条件下对蛋白质分子的吸附及其与ζ电势的关系。通过动态光散射(Dynamic Light Scattering,DLS)和傅立叶变换红外光谱(Fourier Transform Infrared,FTIR)技术分别研究了纳米晶吸附蛋白后流体力学直径的变化以及蛋白质构象的变化。结果表明,ZnFe_2O_4纳米晶对牛血红蛋白的吸附符合静电吸附的规律,而对BSA的吸附则不符合静电吸附的规律。纳米晶吸附牛血红蛋白后主要以单体和三聚体的形式存在,仅存在少量的团聚体,而吸附BSA后完全以团聚体的形式存在。FTIR光谱则显示纳米晶对牛血红蛋白构象的影响大于对BSA构象的影响。在合适的pH条件下,纳米晶对BSA及牛血红蛋白的吸附容量均超过380mg·g~(-1),有望应用于蛋白质的高效分离。
语种:
中文
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Synthesis of ZnO nanostructure films by thermal evaporation approach and their application in dye-sensitized solar cells
作者:
Fodjouong, Ghislain Joel* ;Feng, Yamin;Sangare, Moussa;Huang, Xintang
期刊:
Materials Science in Semiconductor Processing ,2013年16(3):652-658 ISSN:1369-8001
通讯作者:
Fodjouong, Ghislain Joel
作者机构:
[Fodjouong, Ghislain Joel; Huang, Xintang; Feng, Yamin; Sangare, Moussa] Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构:
[Fodjouong, Ghislain Joel] C;Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词:
Zinc oxide;Nanorod;Nanoparticle;Dye-sensitized solar cell;Thermal evaporation
摘要:
Zinc oxide (ZnO) films were prepared successfully by simple thermal evaporation of zinc acetate dihydrate at low temperature onto FTO (fluorine-doped tin oxide) glass substrates coated with thin ZnO seed layer. The synthetic parameter such as temperature was found to determine the morphology of nanostructures. ZnO nanorod (NR) and nanoparticle (NP) films have been synthesized at 245 and 350 °C, respectively, for 6 h. The dye-sensitized solar cells (DSSCs) were fabricated using the ZnO nanostructure films as photosensitized electrodes. A maximum photoelectric conversion efficiency (PCE) of 1.56%, and short-circuit photocurrent density of 5.12 mA/cm<sup>2</sup> were achieved with the ZnO NP-based DSSC. The PCE increase was ascribed to the reduced recombination loss and prolonged electron lifetime according to electrochemical impedance spectroscopy (EIS). ©2012 Elsevier Ltd. All rights reserved.
语种:
英文
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Synthesis of ZnO@TiO2 core–shell long nanowire arrays and their application on dye-sensitized solar cells
作者:
Feng, Yamin;Ji, Xiaoxu;Duan, Jinxia;Zhu, Jianhui;Jiang, Jian;...
期刊:
Journal of Solid State Chemistry ,2012年190:303-308 ISSN:0022-4596
通讯作者:
Huang, Xintang
作者机构:
[Ding, Hao; Ding, Ruimin; Huang, Xintang; Liu, Jinping; Feng, Yamin; Meng, Gaoxiang; Jiang, Jian; Duan, Jinxia; Zhu, Jianhui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.;[Ji, Xiaoxu] Nanyang Normal Univ, Sch Phys & Elect Engn, Nanyang 473003, Peoples R China.;[Hu, Anzheng] Coll Xiangfan, Sch Phys & Elect Engn, Xiangfan 441813, Peoples R China.
通讯机构:
[Huang, Xintang] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
关键词:
DSSCs;Hydrothermal method;PCE;[email protected] 2 NAs
摘要:
Long ZnO nanowire arrays (NAs) grown on fluorine-doped tin oxide (FTO) glasses have been synthesized via a facile hydrothermal method without refreshing the reaction solution and applied as the precursor. By adjusting growth conditions, ZnO NAs with tunable lengths can be achieved. A nanocomposite made of ZnO nanowire core and TiO2 shell was further realized by a novel “fast-dip-coating” method conducted in a Ti(OC4H9)4-dissolved ethanol solution. The formed ZnO@TiO2 core–shell NAs on FTO substrates were applied as electrodes for dye sensitized solar cells (DSSCs). It is found that both the TiO2 coating and NAs length play important roles in the enhancement of photoelectric conversion efficiency (PCE) of DSSCs. When the length of ZnO@TiO2 NAs reaches up to 14 μm, the electrode can exhibit a maximum PCE as high as 3.80%, which is 2.6 times higher than that of pure ZnO NAs.
语种:
英文
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Co-Fe Mixed Oxide Nanoneedle-on-Nanowall Arrays on Conductive Substrate: Synthesis and Field Emission
作者:
Jiang, Jian;Zhu, Jianhui;Ding, Ruimin;Li, Yuanyuan;Liu, Jinping* ;...
期刊:
Science of Advanced Materials ,2012年4(2):346-350 ISSN:1947-2935
通讯作者:
Liu, Jinping
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Jiang, Jian; Zhu, Jianhui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China.
通讯机构:
[Liu, Jinping] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词:
Co-fe LDH;Co-fe mixed oxides;Field emission;Growth mechanism;Hierarchical nanostructures
摘要:
We report the fabrication of Co-Fe mixed oxides with an intriguing hierarchical nanostructure built on Fe-Co-Ni alloy substrate. This novel structure comprises two-dimensional (2D) nanostructured arrays and onedimensional (1D) nanoneedles aligned on their top. The possible growth mechanism has been discussed in details on the basis of time-dependent experiments. The results indicate that the formation of 1D/2D nanostructures results from the secondary growth of Co-based hydroxides on layered double hydroxide (LDH) nanowalls. The precursor materials can be further transformed into Co-Fe mixed oxides by annealing in Argon atmosphere. Then, the nanostructured film of Co-Fe mixed oxides was investigated as cathode for field emission (FE) application. This work presents not only one kind of Co-based mixed oxides for possible FE cathode, but also a tunable pathway to build well-engineered hierarchical nanostructures. © 2012 by American Scientific Publishers.
语种:
英文
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The three-dimensional coordination network in poly[di-μ3- cyanido-μ5-[5-(pyridin-4-yl)tetra-zol-ato]-tricopper(I)]
作者:
Meng, Gao-Xiang;Zhu, Jian-Hui;Feng, Ya-Min;Huang, Xin-Tang;Yang, He-Lin*
期刊:
Acta Crystallographica Section E: Crystallographic Communications ,2012年68(7):m194-m196 ISSN:2056-9890
通讯作者:
Yang, He-Lin
作者机构:
[Feng, Ya-Min; Yang, He-Lin; Meng, Gao-Xiang; Zhu, Jian-Hui; Huang, Xin-Tang] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
通讯机构:
[Yang, He-Lin] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
摘要:
In the title three-dimensional tetra-zolate-based coordination polymer, poly[bis-(μ<inf>3</inf>-cyanido-κ<sup>3</sup> N:C:C)[μ<inf>5</inf>- 5-(pyridin-4-yl)tetrazolato-κ<sup>5</sup> N:N':N″:N‴: N′‴]tricopper(I)], [Cu<inf>3</inf>(C<inf>6</inf>H<inf>4</inf>N <inf>5</inf>)(CN)<inf>2</inf>]<inf>n</inf>, there are two types of coordinated Cu<sup>I</sup> atoms. One type exhibits a tetra-hedral environment and the other, residing on a twofold axis, adopts a trigonal coordination environment. The closest Cu&mellip;Cu distance is only 2.531 (2) A˚, involving a bridging cyanide C atom. All four tetra-zolate and the pyridine N atom of the 4-(pyridin-4-yl)-1H-tetra-zolate anion are coordinated to these Cu<sup>I</sup> atoms and exhibit a μ<inf>5</inf>-bridging mode. The three-dimensional coordination network can be topologically simplified as a rarely observed (3,3,4,5)-connected network with the Schla¨fli symbol (4.6.8 <sup>4</sup>)<inf>2</inf>.(4<sup>2</sup>.6.8<sup>7</sup>).(6.8<sup>2</sup>) <inf>3</inf>. ©2012 International Union of Crystallography.
语种:
英文
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Recent advances in metal oxide-based electrode architecture design for electrochemical energy storage
作者:
Jiang, Jian;Li, Yuanyuan;Liu, Jinping* ;Huang, Xintang;Yuan, Changzhou;...
期刊:
Advanced Materials ,2012年24(38):5166-5180 ISSN:0935-9648
通讯作者:
Liu, Jinping
作者机构:
[Huang, Xintang; Liu, Jinping; Jiang, Jian] Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China.;[Lou, Xiong Wen (David); Yuan, Changzhou] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637457, Singapore.
通讯机构:
[Liu, Jinping] C;Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
摘要:
Metal oxide nanostructures are promising electrode materials for lithium-ion batteries and supercapacitors because of their high specific capacity/capacitance, typically 2-3 times higher than that of the carbon/graphite-based materials. However, their cycling stability and rate performance still can not meet the requirements of practical applications. It is therefore urgent to improve their overall device performance, which depends on not only the development of advanced electrode materials but also in a large part "how to design superior electrode architectures". In the article, we will review recent advances in strategies for advanced metal oxide-based hybrid nanostructure design, with the focus on the binder-free film/array electrodes. These binder-free electrodes, with the integration of unique merits of each component, can provide larger electrochemically active surface area, faster electron transport and superior ion diffusion, thus leading to substantially improved cycling and rate performance. Several recently emerged concepts of using ordered nanostructure arrays, synergetic core-shell structures, nanostructured current collectors, and flexible paper/textile electrodes will be highlighted, pointing out advantages and challenges where appropriate. Some future electrode design trends and directions are also discussed. The development of high-performance lithium-ion batteries/ supercapacitors relies on not only the use of advanced electrode materials but also the design of electrode architectures. This Review focuses on the recent advances in design of advanced metal oxide-based hybrid nanostructure electrode. Several recently emerged concepts of using ordered nanostructure arrays, synergetic core-shell structures, nanostructured current collectors, and flexible paper/textile electrodes are highlighted. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种:
英文
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Mixed Ni-Cu-oxide nanowire array on conductive substrate and its application as enzyme-free glucose sensor
作者:
Ding, Ruimin* ;Liu, Jinping;Jiang, Jian;Zhu, JianHui;Huang, Xintang
期刊:
Analytical Methods ,2012年4(12):4003-4008 ISSN:1759-9660
通讯作者:
Ding, Ruimin
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Jiang, Jian; Zhu, JianHui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构:
[Ding, Ruimin] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
摘要:
We report the synthesis of mixed Ni-Cu-oxide nanowire array on flexible metal substrate by a hydrothermal process and subsequent decomposition-related annealing treatment. Every single nanowire is a particles matrix with embedded NiO and CuO grains. To the best of our knowledge, this is the first report that mixed oxides exist in this aligned architecture. As an example of the functional properties of the compound materials, the mixed Ni-Cu-oxide nanowire array is investigated as the additive-free electrode for enzyme-free glucose sensor. Compared with previously reported Ni or Cu-contained biosensors, this Ni-Cu-oxide array electrode possesses higher performance. The detection limit can be as low as 0.1 μM, linear range as wide as 0.1-1200 μM and sensitivity as high as ∼1600 μA mM-1 cm-2. Besides the above, other excellent properties such as anti-interferences and long-term stability, are demonstrated as well. All these improvements can be attributed to the synergetic effect between the mixed oxide grains and the unique 1D array feature. © 2012 The Royal Society of Chemistry.
语种:
英文
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Preparation and gas-sensing property of ultra-fine NiO/SnO2 nano-particles
作者:
Ding, Hao* ;Zhu, Jianhui;Jiang, Jian;Ding, Ruimin;Feng, Yamin;...
期刊:
RSC Advances ,2012年2(27):10324-10329 ISSN:2046-2069
通讯作者:
Ding, Hao
作者机构:
[Ding, Hao; Ding, Ruimin; Huang, Xintang; Wei, Guanming; Feng, Yamin; Jiang, Jian; Zhu, Jianhui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构:
[Ding, Hao] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
摘要:
Novel ultra-fine NiO/SnO2 nano-particles (NPs) have been fabricated by creatively using carbon black (CB) as a frame and dispersing agent and applied as gas-sensing materials. In a typical synthesis, a precursor composed of mixed NiO/SnO2 NPs and CB was initially prepared. Subsequently, the ultra-fine NiO/SnO2 NPs were obtained by a thermal treatment of the precursor. The final products were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and Brunauer Emmett Teller N2 adsorption–desorption analysis. The ethanol-sensing tests revealed that the ultra-fine NiO/SnO2 NPs used as gas sensors have a quick response/recovery capability (response time: 2–40 s; recovery time: 3–20 s) within a detecting range of 5–100 ppm at an operating temperature of 300 °C; strikingly, the response/recovery times are quite short (2 s and 3 s, respectively) even under the detection limit of 5 ppm. As demonstrated, the ultra-fine NiO/SnO2 NPs are highly promising for real-time monitoring gas sensor applications.
语种:
英文
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A novel evolution strategy to fabricate a 3D hierarchical interconnected core-shell Ni/MnO2 hybrid for Li-ion batteries
作者:
Jiang, Jian;Zhu, Jianhui;Feng, Yamin;Liu, Jinping* ;Huang, Xintang
期刊:
Chemical Communications ,2012年48(60):7471-7473 ISSN:1359-7345
通讯作者:
Liu, Jinping
作者机构:
[Huang, Xintang; Liu, Jinping; Feng, Yamin; Jiang, Jian; Zhu, Jianhui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构:
[Liu, Jinping] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
摘要:
A novel evolution strategy has been put forward to build a 3D interconnected core-shell Ni/MnO(2) hybrid on a current collector, which demonstrated stable cyclic performance and good rate capabilities when applied as the anode for Li-ion batteries.
语种:
英文
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Cu@C composite nanotube array and its application as an enzyme-free glucose sensor
作者:
Ding, Ruimin;Jiang, Jian;Wu, Fei;Gong, Min;Zhu, Jianhui;...
期刊:
Nanotechnology ,2011年22(37):375303- ISSN:0957-4484
通讯作者:
Huang, Xintang
作者机构:
[Ding, Ruimin; Huang, Xintang; Wu, Fei; Jiang, Jian; Zhu, Jianhui] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;[Gong, Min] Univ Sci & Technol China, Dept Mech & Engn, Hefei 230026, Peoples R China.
通讯机构:
[Huang, Xintang] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要:
We report a novel hydrothermal method for the synthesis of a [email protected] nanotube array on a centimeter-scale substrate for the first time. In this hydrothermal reaction process, employing the carbon coated ZnO nanorod array as an inexpensive and partially sacrificial template, along with the ZnO dissolving in the alkaline atmosphere, the formed Cu particles deposit and grow on the carbon surface gradually. Importantly, the carbon shell of the template is not only essential to the preservation of the array configuration, but also makes a significant contribution to the final nanostructure. Such a method provides a morphology-reservation transformation when various shaped carbon-containing templates are adopted. Moreover, this designed [email protected] array has been demonstrated as an excellent electrode material for an enzyme-free glucose sensor in terms of sensitivity (1200νAmM- 1cm- 2) and significantly lower applied potential (-0.2V). Our results present the first preparation of the [email protected] composite nanotube array and may open up an opportunity for rational design of advanced electrode materials for enzyme-free glucose sensors. © 2011 IOP Publishing Ltd.
语种:
英文
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Large-Scale Uniform α-Co(OH)2 Long Nanowire Arrays Grown on Graphite as Pseudocapacitor Electrodes
作者:
Jiang, Jian;Liu, Jinping;Ding, Ruimin;Zhu, Jianhui;Li, Yuanyuan;...
期刊:
ACS Applied Materials & Interfaces ,2011年3(1):99-103 ISSN:1944-8244
通讯作者:
Huang, Xintang
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Jiang, Jian; Li, Xin; Zhu, Jianhui; Hu, Anzheng] Huazhong Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China.
通讯机构:
[Huang, Xintang] H;Huazhong Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词:
α-Co(OH)2;Graphite substrate;Long nanowire arrays;Robust adhesion;Sacrificial template;Supercapacitor
摘要:
Large-scale uniform α-Co(OH)2 nanowire arrays (NWAs) with an average length of ̃20 μm grown on pyrolytic graphite (PG) were successfully synthesized by a hydrothermal method at 120 °C. Ultrasonication test was carried out toward the as-made nanoarray products and the result demonstrated their robust adhesion to graphitic substrate. After 300 s of sonication testing, α-Co(OH)2 NWAs could still possess both integrated one-dimensional (1D) nanoarray architecture and good electronic connections with current collector. When investigated as electrochemical pseudocapacitor electrodes, α-Co(OH)2 NWAs exhibited good energy-storage performance in terms of high specific capacitance of 642.5 F/g, good rate capability, and excellent capacity retention. Our work not only presents a cost-effective and scale-up synthetic method for α-Co(OH) 2 NWAs but also holds promise in general synthesis of long arrays of other metal hydroxides/oxide (TiO2, Fe2O3, SnO2, etc.) nanostructures on PG substrate by using α-Co(OH)2 NWAs as sacrificial templates. © 2011 American Chemical Society.
语种:
英文
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Co-Fe layered double hydroxide nanowall array grown from an alloy substrate and its calcined product as a composite anode for lithium-ion batteries
作者:
Jiang, Jian;Zhu, Jianhui;Ding, Ruimin;Li, Yuanyuan;Wu, Fei;...
期刊:
Journal of Materials Chemistry ,2011年21(40):15969-15974 ISSN:0959-9428
通讯作者:
Liu, Jinping
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Wu, Fei; Jiang, Jian; Zhu, Jianhui] Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China.
通讯机构:
[Liu, Jinping] C;Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要:
Co-Fe layered double hydroxide (LDH) nanowall arrays (NWAs) have been grown directly from a flexible alloy substrate by a facile hydrothermal method. An ultrasonication test of 30 min towards the as-made Co-Fe LDH NWAs has demonstrated their ultra-robust mechanical adhesion to the substrate. In particular, an in situ carbon-source coating (ISCC) on the Co-Fe LDH NWAs was achieved during their in situ growing process conducted in a glucose-containing reaction solution. After annealing treatment in an argon atmosphere, carbon coated Co-Fe mixed oxide NWAs were evolved from thermal decomposition of LDH precursors and carbonization of glucose, and further investigated as anode materials for lithium-ion batteries (LIBs). When tested, the obtained carbon coated Co-Fe mixed oxide NWAs with improved electrical conductivity exhibited superior electrochemical performance in terms of specific capacity and cyclability as compared to a carbon-free sample and a sample made by the previous carbon-coating method. Our work presents an alternative way to fabricate in situ mixed transition metal oxide nanostructures for high-performance LIBs. ©2011 The Royal Society of Chemistry.
语种:
英文
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Urchinlike MnO2 nanoparticles for the direct electrochemistry of hemoglobin with carbon ionic liquid electrode
作者:
Zhu, Zhihong;Qu, Lining;Niu, Qingjuan;Zeng, Yan;Sun, Wei* ;...
期刊:
Biosensors and Bioelectronics ,2011年26(5):2119-2124 ISSN:0956-5663
通讯作者:
Sun, Wei
作者机构:
[Huang, Xintang; Zhu, Zhihong; Zeng, Yan] Huazhong Normal Univ, Inst Nanosci, Wuhan 430079, Peoples R China.;[Sun, Wei; Qu, Lining; Niu, Qingjuan] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China.;[Huang, Xintang; Zhu, Zhihong; Zeng, Yan] Huazhong Normal Univ, Ctr Technol, Wuhan 430079, Peoples R China.
通讯机构:
[Sun, Wei] Q;Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China.
关键词:
Urchinlike MnO2 nanoparticle;Carbon ionic liquid electrode;Hemoglobin;Direct electrochemistry
摘要:
In this paper an urchinlike MnO2 nanoparticle was synthesized by hydrothermal method and applied to the protein electrochemistry for the first time. By using a carbon ionic liquid electrode (CILE) as the basal electrode, hemoglobin (Hb) was immobilized on the surface of CILE with chitosan (CTS) and MnO2 nanoparticle composite materials. Spectroscopic results indicated that Hb molecules retained its native structure in the composite film. A pair of well-defined redox peaks appeared on the cyclic voltammogram with the formal peak potential as -0.180V (vs. SCE), which indicated that direct electron transfer of Hb was realized on the modified electrode. The result can be attributed to the specific characteristic of MnO2 nanoparticle and the advantages of CILE, which facilitated the electron transfer rate. The fabricated CTS-MnO2-Hb/CILE showed good electrocatalytic ability to the reduction of trichloroacetic acid (TCA). Under the optimal conditions the catalytic current was in linear to TCA concentration in the range from 0.5 to 16.0mmolL-1 with the detection limit calculated as 0.167mmolL-1 (3σ). The result indicated that urchinlike MnO2 nanoparticle had the potential application in the third generation electrochemical biosensors. © 2010 Elsevier B.V.
语种:
英文
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Preparation of nickel oxide and carbon nanosheet array and its application in glucose sensing
作者:
Li, Xin;Hu, Anzheng;Jiang, Jian;Ding, Ruimin;Liu, Jinping;...
期刊:
Journal of Solid State Chemistry ,2011年184(10):2738-2743 ISSN:0022-4596
通讯作者:
Huang, Xintang
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Jiang, Jian; Li, Xin; Hu, Anzheng] Cent China Normal Univ, Ctr Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Li, Xin] Wuhan Univ Sci & Technol, Dept Appl Phys, Wuhan 430081, Peoples R China.
通讯机构:
[Huang, Xintang] C;Cent China Normal Univ, Ctr Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词:
Nickel oxide;Nanosheet array;Carbon;Hydrothermal method;Glucose sensing
摘要:
Nickel oxide and carbon (NiO/C) nanosheet array was fabricated on Ti foil for the first time by calcining the precursor, which was synthesized through the hydrothermal reaction of nickel acetate, urea and glucose. The slow release of OH<sup>-</sup> by the hydrolysis of urea aided in the direct nucleation and adhesion of precursor seeds on Ti substrate. The presence of carbon ensured a large specific surface area and good conductivity of the final NiO/C composite. The prepared NiO/C nanosheet array exhibited higher catalytic oxidation activity of glucose compared with the pure NiO nanosheet at a detection limit of 2 μM, linear range up to 2.6 mM (R<sup>2</sup>=0.99961), and sensitivity of 582.6 μAm M<sup>-1</sup> cm<sup>-2</sup>. With good analytical performance, simple preparation and low cost, this composite is promising for nonenzymatic glucose sensing. ©2011 Published by Elsevier Inc. All rights reserved.<br/>
语种:
英文
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High rate performances of the cathode material LiNi1/3Co1/3Mn1/3O2 synthesized using low temperature hydroxide precipitation
作者:
Cheng, Cuixia;Tan, Long;Liu, Haowen;Huang, Xintang*
期刊:
Materials Research Bulletin ,2011年46(11):2032-2035 ISSN:0025-5408
通讯作者:
Huang, Xintang
作者机构:
[Huang, Xintang; Cheng, Cuixia] Cent China Normal Univ, Dept Phys, Ctr Nanosci & Technol, Wuhan 430079, Peoples R China.;[Tan, Long; Liu, Haowen] S Cent Univ Nationalities, Wuhan 430074, Peoples R China.;[Liu, Haowen] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
通讯机构:
[Huang, Xintang] C;Cent China Normal Univ, Dept Phys, Ctr Nanosci & Technol, Wuhan 430079, Peoples R China.
关键词:
A. Layered compounds;B. Chemical synthesis;C. X-ray diffraction;D. Electrochemical properties
摘要:
A low-temperature reaction route is introduced based on hydroxide precipitation method to synthesize the cathode material LiNi <inf>1/3</inf>Co<inf>1/3</inf>Mn<inf>1/3</inf>O<inf>2</inf>. The crystal structure and morphology of the prepared powder have been characterized by X-ray diffraction and Scan electron microscope, respectively. The charge-discharge tests were performed between 2.5 and 4.5 V. The discharge capacity of the material is strongly impacted by the reaction temperature. The powders sintered at 850 °C show the best electrochemical performance and the initial discharge capacity is about 160 mAh g<sup>-1</sup> at 5 C. Powder X-ray diffraction and Scan electron microscope results reveal that the excellent electrochemical performances should be ascribed to the lower precursor reaction temperature, the lower degree of cation mixing and analogous spherical small particles, which can improve the transfer of Li ions and electrons. All these results indicate that this material has potential application in lithium-ion batteries. ©2011 Elsevier Ltd. All rights reserved.
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英文
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Tailored Ni-Cu alloy hierarchical porous nanowire as a potential efficient catalyst for DMFCs
作者:
Ding, Ruimin* ;Liu, Jinping;Jiang, Jian;Wu, Fei;Zhu, Jianhui;...
期刊:
Catalysis Science & Technology ,2011年1(8):1406-1411 ISSN:2044-4753
通讯作者:
Ding, Ruimin
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Wu, Fei; Jiang, Jian; Zhu, Jianhui] Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构:
[Ding, Ruimin] H;Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要:
An urchin-like Ni-Cu nanoalloy has been prepared for the first time by a combined urea precipitation-hydrothermal reaction and high-temperature decomposition approach, and has demonstrated better electrocatalytic activities towards the oxidation of methanol. © 2011 The Royal Society of Chemistry.
语种:
英文
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CNT-network modified Ni nanostructured arrays for high performance non-enzymatic glucose sensors
作者:
Zhu, Jianhui* ;Jiang, Jian;Liu, Jinping;Ding, Ruimin;Li, Yuanyuan;...
期刊:
RSC Advances ,2011年1(6):1020-1025 ISSN:2046-2069
通讯作者:
Zhu, Jianhui
作者机构:
[Ding, Ruimin; Ding, Hao; Huang, Xintang; Liu, Jinping; Feng, Yamin; Jiang, Jian; Wei, Guangming; Zhu, Jianhui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China.
通讯机构:
[Zhu, Jianhui] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
摘要:
Ni nanostructured arrays (NAs) modified by entangled carbon nanotube (CNT) networks have been fabricated via a facile chemical vapor deposition (CVD) approach and applied as an electrode for non-enzymatic glucose sensors for the first time. Compared with previously reported Ni-contained biosensors, the electrode of CNT/Ni NAs possess higher performance for the detection of glucose, showing a low detection limit (1 μM, S/N = 3), a wide linear range (0.5-10 mM) and quite high sensitivity (∼1381 μA mM<sup>-1</sup>cm <sup>-2</sup>). In addition, other excellent properties of the CNT/Ni NAs electrode, such as good reproducibility, long-term stability and anti-interferences, are demonstrated as well. The good analytical capability, low cost and facile preparation method make CNT/Ni NAs promising for amperometric non-enzymatic glucose detection. © The Royal Society of Chemistry 2011.
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英文
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Building one-dimensional oxide nanostructure arrays on conductive metal substrates for lithium-ion battery anodes
作者:
Jiang, Jian;Li, Yuanyuan;Liu, Jinping* ;Huang, Xintang
期刊:
Nanoscale ,2011年3(1):45-58 ISSN:2040-3364
通讯作者:
Liu, Jinping
作者机构:
[Huang, Xintang; Liu, Jinping; Jiang, Jian] Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China.
通讯机构:
[Liu, Jinping] H;Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
摘要:
Lithium ion battery (LIB) is potentially one of the most attractive energy storage devices. To meet the demands of future high-power and high-energy density requirements in both thin-film microbatteries and conventional batteries, it is challenging to explore novel nanostructured anode materials instead of conventional graphite. Compared to traditional electrodes based on nanostructure powder paste, directly grown ordered nanostructure array electrodes not only simplify the electrode processing, but also offer remarkable advantages such as fast electron transport/collection and ion diffusion, sufficient electrochemical reaction of individual nanostructures, enhanced material-electrolyte contact area and facile accommodation of the strains caused by lithium intercalation and de-intercalation. This article provides a brief overview of the present status in the area of LIB anodes based on one-dimensional nanostructure arrays growing directly on conductive inert metal substrates, with particular attention to metal oxides synthesized by an anodized alumina membrane (AAM)-free solution-based or hydrothermal methods. Both the scientific developments and the techniques and challenges are critically analyzed. ©2010 The Royal Society of Chemistry.
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英文
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Two novel hierarchical homogeneous nanoarchitectures of TiO2 nanorods branched and P25-coated TiO2 nanotube arrays and their photocurrent performances
作者:
Hu, Anzheng;Cheng, Cuixia;Li, Xin;Jiang, Jian;Ding, Ruimin;...
期刊:
Nanoscale Research Letters ,2011年6(1):X1-6 ISSN:1931-7573
通讯作者:
Huang, Xintang
作者机构:
[Ding, Ruimin; Huang, Xintang; Liu, Jinping; Wu, Fei; Jiang, Jian; Li, Xin; Hu, Anzheng; Cheng, Cuixia; Zhu, Jianhui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Hu, Anzheng] Xiangfan Univ, Sch Phys & Elect Engn, Xiangfan 441053, Hubei, Peoples R China.
通讯机构:
[Huang, Xintang] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要:
We report here for the first time the synthesis of two novel hierarchical homogeneous nanoarchitectures of TiO2 nanorods branched TiO2 nanotube arrays (BTs) and P25-coated TiO2 nanotube arrays (PCTs) using two-step method including electrochemical anodization and hydrothermal modification process. Then the photocurrent densities versus applied potentials of BTs, PCTs, and pure TiO2 nanotube arrays (TNTAs) were investigated as well. Interestingly, at -0.11 V and under the same illumination condition, the photocurrent densities of BTs and PCTs show more than 1.5 and 1 times higher than that of pure TNTAs, respectively, which can be mainly attributed to significant improvement of the light-absorbing and charge-harvesting efficiency resulting from both larger and rougher surface areas of BTs and PCTs. Furthermore, these dramatic improvements suggest that BTs and PCTs will achieve better photoelectric conversion efficiency and become the promising candidates for applications in DSSCs, sensors, and photocatalysis.
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英文
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Application of cobalt oxide nanoflower for direct electrochemistry and electrocatalysis of hemoglobin with ionic liquid as enhancer
作者:
Zhu, Zhihong;Li, Xia;Zeng, Yan;Sun, Wei* ;Zhu, Weiming;...
期刊:
Journal of Physical Chemistry C ,2011年115(25):12547-12553 ISSN:1932-7447
通讯作者:
Sun, Wei
作者机构:
[Huang, Xintang; Zhu, Zhihong; Zeng, Yan; Zhu, Weiming] Huazhong Normal Univ, Inst Nanosci, Wuhan 430079, Peoples R China.;[Sun, Wei; Li, Xia] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China.;[Huang, Xintang; Zhu, Zhihong; Zeng, Yan; Zhu, Weiming] Huazhong Normal Univ, Ctr Technol, Wuhan 430079, Peoples R China.
通讯机构:
[Sun, Wei] Q;Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China.
摘要:
A composite bionanomaterial was prepared by combining Nafion, flowerlike cobalt oxide (CoO) nanoparticles, hemoglobin (Hb), and ionic liquid (IL) 1-ethyl-3-methylimidazolium tetrafluoroborate. Then it was further applied on the surface of a carbon ionic liquid working electrode fabricated with 1-ethyl-3-methylimidazolium ethylsulfate as the modifier. Ultraviolet–visible and Fourier transform infrared spectroscopic results indicated that Hb molecules in the composite film retained the native structure. Cyclic voltammetric results showed that a pair of well-defined redox peaks appeared in 0.1 mol L–1 pH 4.0 phosphate buffer solution, indicating that the direct electron transfer of Hb with the underlying electrode was realized. The results could be attributed to the synergistic effect of CoO nanoflower and IL in the composite film, which provided a specific microenvironment to keep the native structure of Hb and promoted the electron transfer rate of Hb. The electrochemical parameters of Hb on the modified electrode were carefully calculated. The composite material modified electrode showed excellent electrocatalytic ability toward the reduction of different substrates such as trichloroacetic acid and H2O2, which exhibited advantages such as high sensitivity, good stability, and wide dynamic range. Therefore, it has potential application in third-generation electrochemical biosensors.
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英文
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