| 聚合物前驱体法制备立方相WO_3薄膜的光电化学性质 |
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| 引用本文： | 李文章,李洁,王旋,张姝娟,陈启元.聚合物前驱体法制备立方相WO_3薄膜的光电化学性质[J].物理化学学报,2010,26(9):2343-2348. |
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| 作者姓名： | 李文章 李洁 王旋 张姝娟 陈启元 |
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| 作者单位： | 1. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China;
2. Shenyang Aluminum and Magnesium Engineering and Research Institute, Shenyang 110001, P. R. China |
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| 基金项目： | 教育部新世纪优秀人才资助计划,湖南省重大科技计划项目 |
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| 摘 要： | 以(NH4)6W7O24·6H2O为钨源,聚乙二醇1000(PEG 1000)为配位聚合物,采用聚合物前驱体法制备了WO3薄膜,利用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见(UV-Vis)吸收光谱等手段对其结构进行表征.采用循环伏安法、Mott-Schottky测试、瞬态光和稳态光电流谱等方法研究了WO3薄膜电极的光电化学性能.结果表明,制备的WO3薄膜为立方晶系,禁带宽度约为2.7eV.当热处理温度为450℃时,载流子浓度达到最大2.44×1022cm-3,平带电位为0.06V,在500W氙灯光源照射和1.2V偏压下,光电流密度为2.70mA·cm-2.进一步探讨了热处理温度对其光电性质的影响及其机理.
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| 关 键 词： | 立方相WO3 纳米薄膜 光电化学 聚合物前驱体 |
| 收稿时间： | 2010-03-09 |
| 修稿时间： | 2010-07-08 |
Photoelectrochemical Properties of Cubic Tungsten Trioxide Films Obtained by the Polymeric Precursor Method |
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| LI Wen-Zhang,LI Jie,WANG Xuan,ZHANG Shu-Juan,CHEN Qi-Yuan.Photoelectrochemical Properties of Cubic Tungsten Trioxide Films Obtained by the Polymeric Precursor Method[J].Acta Physico-Chimica Sinica,2010,26(9):2343-2348. |
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| Authors: | LI Wen-Zhang LI Jie WANG Xuan ZHANG Shu-Juan CHEN Qi-Yuan |
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| Institution: | 1. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China;
2. Shenyang Aluminum and Magnesium Engineering and Research Institute, Shenyang 110001, P. R. China |
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| Abstract: | WO3 films were prepared using ammonium metatungstate as the precursor and polyethylene glycol 1000 as the structure-directing agent by the polymeric precursor method. The obtained materials were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) spectrophotometry. The photoelectrochemical properties of the WO3 film electrodes were studied by cyclic voltammetry, Mott-Schottky, transient photocurrent spectra, and photocurrent-potential curve analysis. Results indicate that the films are crystalline with a cubic structure and they have bandgap energy of 2.7 eV. The flat band potential, donor carrier density, and photocurrent density of the sample calcined at 450 ℃ are 0.06 V, 2.44×1022 cm-3 and 2.70 mA·cm-2 under a 500W Xe lamp (I0=100 mW·cm-2), respectively. The effect of calcination temperature on the photoelectrochemical properties of the WO3 films was investigated and the mechanismof charge separation for its behavior was also discussed. |
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| Keywords: | 3' ') Cubic WO3" target="_blank">">Cubic WO3 Nano-structured film Photoelectrochemistry Polymeric precursor |
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