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| 两种菁类染料复合敏化TiO_2纳米晶电极的光电化学研究 | |
| 引用本文： | 过家好,何晓英,蔡生民,郭敏,陈秀英,彭孝军.两种菁类染料复合敏化TiO_2纳米晶电极的光电化学研究[J].化学学报,2009,67(15). |
| 作者姓名： | 过家好 何晓英 蔡生民 郭敏 陈秀英 彭孝军 |
| 作者单位： | 1. 安徽科技学院理学院,凤阳,233100;北京大学化学与分子工程学院,北京,100871 2. 西华师范大学化学化工学院,南充,637002 3. 北京大学化学与分子工程学院,北京,100871 4. 大连理工大学精细化工国家重点实验室,大连,116024 |
| 基金项目： | 国家自然科学基金，安徽省教育厅高校青年基金 |
| 摘 要： | 应用光电化学方法研究了两种菁类染料Cy3和Cy5复合敏化TiO2纳米晶电极的光电化学行为.结合两种染料的紫外-可见光谱和循环伏安曲线,确定了Cy3和Cy5的电子基态和激发态能级位置.结果表明两种染料的激发态能级位置能与TiO2纳米粒子导带边位置相匹配,复合敏化可以显著提高TiO2纳米晶的光电流,使TiO2纳米晶电极吸收波长由紫外光区红移至可见光区和近红外区.复合敏化降低了染料Cy3 在电极吸附时的聚集程度,使其单色光的转换效率(IPCE)提高了169%,复合敏化电极总的光电转换效率η为2.09%,分别是Cy3和Cy5单独敏化时光电转换效率的2.069 和1.229倍. |
| 关 键 词： | 复合敏化 TiO2纳米品膜电极 光电化学 菁类染料 |
Photoelectrochemical Studies of the TiO_2 Nanocrystalline Electrode Composite Sensitized by Two Cyanine Dyes |
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| Guo Jiahao,He Xiaoying,Cai Shengmin,Guo Min,Chen Xiuying,Peng Xiaojun.Photoelectrochemical Studies of the TiO_2 Nanocrystalline Electrode Composite Sensitized by Two Cyanine Dyes[J].Acta Chimica Sinica,2009,67(15). | |
| Authors: | Guo Jiahao He Xiaoying Cai Shengmin Guo Min Chen Xiuying Peng Xiaojun |
| Affiliation: | a College of Science;Anhui Science and Technology University;Fengyang 233100;b College of Chemistry and Molecular Engineering;Peking University;Beijing 100871;c College of Chemistry;China West Normal University;Nanchong 637002;d State Key Laboratory of Fine Chemicals;Dalian University of Technology;Dalian 116024 |
| Abstract: | The photoelectrochemical behavior of the TiO2 nanocrystalline electrode composite sensitized by Cy3 and Cy5 was studied. The ground state level and the excited state level of the two dyes were determined by using the cyclic voltammetry and the optical absorption spectroscopy. The results show that the excited state level of the two dyes matches the conduction band edge of TiO2 nanoparticles. Therefore, the composite sensitization can increase the photocurrent density of TiO2 nanocrystalline electrode obviou... |
| Keywords: | composite sensitization TiO2 nanocrystalline electrode photoelectrochemistry cyanine dye |
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