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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (18): 1871-1875. 上一篇    下一篇

研究论文

聚3-甲基噻吩及聚3-己基噻吩修饰钛酸盐纳米管的光电化学性能研究

郝彦忠*,1,2, 韩文涛2   

  1. (1河北科技大学理学院 石家庄 050018)
    (2河北科技大学化学与制药工程学院 石家庄 050018)
  • 投稿日期:2005-11-10 修回日期:2006-04-09 发布日期:2006-09-28
  • 通讯作者: 郝彦忠

Photoelectrochemical Performance of Titanate Nanotubes Modified with Poly(3-methylthiophene) and Poly(3-hexylthiophene)

HAO Yan-Zhong*,1,2; HAN Wen-Tao2   

  1. (1 College of Science, Hebei University of Science and Technology, Shijiazhuang 050018)
    (2 College of Chemistry and Pharmacy Engineering, Hebei University of Science and Technology, Shijiazhuang 050018)
  • Received:2005-11-10 Revised:2006-04-09 Published:2006-09-28
  • Contact: HAO Yan-Zhong

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770

被引次数

28 | 3

采用水热法制备了钛酸盐纳米管, 并将钛酸盐纳米管制备成纳米结构电极进行光电化学研究. 钛酸盐纳米管产生阳极光电流, 具有n-型半导体特性. 结果表明, 聚3-甲基噻吩[poly(3-methylthiophene), PMeT]、聚3-己基噻吩[poly(3-hexylthiophene), P3HT]修饰钛酸盐纳米管后产生的光电流均较纯钛酸盐纳米管的光电流高, 且使产生光电流的波长向长波区移动. 钛酸盐纳米管/PMeT、钛酸盐纳米管/P3HT的光电转换效率分别达11.40%, 0.91%(未校正光子损失). 钛酸盐纳米管/PMeT的光电转换效率较钛酸盐纳米管/P3HT的光电转换效率高10.5%. 钛酸盐纳米管/PMeT、钛酸盐纳米管/P3HT中存在p-n异质结, 在一定条件下p-n异质结的存在有利于光生电子/空穴的分离.

关键词: 钛酸盐纳米管, 光电化学, 聚3-甲基噻吩, 聚3-己基噻吩

Titanate nanotubes were prepared by hydrothermal method. The photoelectrochemical properties of the titanate nanotubes were investigated. The titanate nanotubes produced anodic photocurrent, exhibiting the property of n-type semiconductor. The experimental results showed that photocurrent produced by the poly(3-methylthiophene) (PMeT) modified titanate nanotubes and the poly(3-hexylthiophene) (P3HT) modified titanate nanotubes was higher than that of the pure titanate nanotubes. The wavelength producing photocurrent for titanate nanotubes/PMeT and titanate nanotubes/P3HT both shifted to long wavelength region respectively. The maximum IPCE of titanate nanotubes/PMeT and titanate nanotubes/P3HT reached 11.40% and 0.91% respectively (no correction for photon loss). The maximum IPCE of titanate nano-tubes/PMeT was higher by 10.5% than that of titanate nanotubes/P3HT. The p-n heterojunction existed in ti-tanate nanotubes/PMeT and titanate nanotubes/P3HT respectively, which favored the separation of elec-tron/hole pairs generated by photoexcition.

Key words: titanate nanotube, photoelectrochemistry, poly(3-methylthiophene), poly(3-hexylthiophene)