| 瞬态光电导谱研究Pt的负载对TiO2光生载流子寿命的影响 |
| |
| 引用本文： | 张雯,王绪绪,付贤智.瞬态光电导谱研究Pt的负载对TiO2光生载流子寿命的影响[J].高等学校化学学报,2005,26(10):1861-1864. |
| |
| 作者姓名： | 张雯 王绪绪 付贤智 |
| |
| 作者单位： | 1. 福建师范大学化学与材料学院,福州,350007
2. 福州大学化学与化工学院光催化研究所,福州,350002 |
| |
| 基金项目： | 国家自然科学基金;福建省自然科学基金;福建省教育厅科研项目 |
| |
| 摘 要： | 采用瞬态光电导谱研究了TiO2的光电导衰减曲线，通过计算机拟合得到光生载流子的寿命，并考察了Pt的负载量对TiO2光生载流子有效寿命的影响。结果表明，增大Pt的负载量，可延缓光电导的衰减趋势，从而延长TiO2光生载流子的有效寿命，有效地降低了光生载流子的复合率。
|
| 关 键 词： | 瞬态光电导谱 |
| 文章编号： | 0251-0790（2005）10-1861-04 |
| 收稿时间： | 12 14 2004 12:00AM |
| 修稿时间： | 2004-12-14 |
Effect of Platinum Loading on Lifetime of Photogenerated Charge Carriers of TiO2 Studied by Time-resolved Photoconductivity |
| |
| ZHANG Wen,WANG Xu-Xu,FU Xian-Zhi.Effect of Platinum Loading on Lifetime of Photogenerated Charge Carriers of TiO2 Studied by Time-resolved Photoconductivity[J].Chemical Research In Chinese Universities,2005,26(10):1861-1864. |
| |
| Authors: | ZHANG Wen WANG Xu-Xu FU Xian-Zhi |
| |
| Abstract: | Time-resolved photoconductivity(TRPC) was used to study the photoconductivity decay of TiO_(2) and the lifetime of the photogenerated charge carriers.Also,we investigated the influence of platinum loading on the characters of the photogenerated charge carriers of TiO_(2).The results showed that the decay tendency of TiO_2 was delayed with the increase of platinum loading and the effective lifetime of the photogenerated charge carriers of TiO_2 containing 1.0%Pt(mass fraction) was prolonged to 1.57 ms from 0.16 ms without Pt loading.The mentioned results suggested that in the presence of Pt the photogenerated electrons of TiO_2 transfer to Pt from semiconductor rapidly,resulting in achieving the effective separateness between the photogenerated(electrons) and holes,prolonging the effective lifetime of the photogenerated carriers,decreasing the recombination rate of photogenerated electrons and holes,and increasing the quantum efficiency of the photocatalytic(reaction). |
| |
| Keywords: | TiO2 Pt/TiO2 |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
