| 掺杂纳米金粒子的火焰氧化TiO2膜的光电化学性质的研究 |
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| 引用本文： | 徐红,刘玲,贾能勤,杨洁,严曼明,江志裕.掺杂纳米金粒子的火焰氧化TiO2膜的光电化学性质的研究[J].中国化学,2005,23(1):18-22. |
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| 作者姓名： | 徐红 刘玲 贾能勤 杨洁 严曼明 江志裕 |
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| 作者单位： | DepartmentofChemistry,ShanghaiKeyLaboratoryofMolecularCatalysisandInnovativeMaterials,FudanUniversity,Shanghai200433,China |
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| 摘 要： | A nano-Au modified TiO2 electrode was prepared via the oxidation of Ti sheet in flame and subsequent modification with gold nanoparticles. The results of SEM and TEM measurements show that the Au nanoparticles are well dispersed on TiO2 surface. A near 2-fold enhancement in photocurrent was achieved upon the modification with Au nanoparticles. From the results of photocurrent and electrochemical impedance experiments it was found that the flatband potential of nano-Au/TiO2 electrode negatively shifted about 100 mV in 0.5 mol/L Na2SO4 solutions compared with that of bare TiO2 electrode. The improvement of photoelectrochemical performance was explained by the inhibition for charge recombination of photo-induced electrons and holes, and the promotion for interracial charge-transfer kinetics at nano-Au/TiO2 composite film. Such nanometal-semiconductor composite films have the potential application in improving the performance of photoelectrochemical solar cells.
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| 关 键 词： | 光电化学 TiO2 二氧化钛薄膜 改性 金纳米离子 电极 |
| 收稿时间： | 2004-3-15 |
| 修稿时间： | 2004-9-27 |
Photoeletrochemical Properties of TiO2 Films Modified with Gold Nanoparticles |
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| Hong Xu,Ling Liu,Neng‐Qin Jia,Jie Yang,Man‐Ming Yan,Zhi‐Yu Jiang.Photoeletrochemical Properties of TiO2 Films Modified with Gold Nanoparticles[J].Chinese Journal of Chemistry,2005,23(1):18-22. |
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| Authors: | Hong Xu Ling Liu Neng‐Qin Jia Jie Yang Man‐Ming Yan Zhi‐Yu Jiang |
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| Abstract: | A nano‐Au modified TiO2 electrode was prepared via the oxidation of Ti sheet in flame and subsequent modification with gold nanoparticles. The results of SEM and TEM measurements show that the Au nanoparticles are well dispersed on TiO2 surface. A near 2‐fold enhancement in photocurrent was achieved upon the modification with Au nanoparticles. From the results of photocurrent and electrochemical impedance experiments it was found that the flatband potential of nano‐Au/TiO2 electrode negatively shifted about 100 mV in 0.5 mol/L Na2SO4 solutions compared with that of bare TiO2 electrode. The improvement of photoelectrochemical performance was explained by the inhibition for charge recombination of photo‐induced electrons and holes, and the promotion for interfacial charge‐transfer kinetics at nano‐Au/TiO2 composite film. Such nanometal‐semiconductor composite films have the potential application in improving the performance of photoelectrochemical solar cells. |
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| Keywords: | TiO2 Au nano materials photoelectrochemistry |
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