Enhanced photocatalytic activity of Ag microgrid connected TiO2 nanocrystalline films

被引：22

作者：

Pan, Feng ^{[1
]}

Zhang, Junying ^{[1
]}

Zhang, Weiwei ^{[1
]}

Wang, Tianmin ^{[1
]}

Cai, Chao ^{[1
]}

机构：

[1] Beihang Univ, Ctr Mat Phys & Chem, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 12期

基金：

中国国家自然科学基金;

关键词：

CHARGE-DISTRIBUTION; NANOPARTICLES; SEPARATION;

D O I：

10.1063/1.2715477

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

One reason for the high degree of photogenerated carrier recombination was found to be the charge accumulation caused by the uneven reaction area on the photocatalyst surface. The authors connected TiO2 nanoparticles with conducting Ag microgrid. Obvious photocatalytic activity improvement (81%) over the pure TiO2 was observed, which is attributed to the electron-hole pairs separation by the metal-semiconductor contact and the large specific area of metal grid, which increased the O-2 absorption and transported the electrons to the sites needed for the deoxidize reactions. This structure lowers the electron accumulation on the particles and improves the utilization ratio of the photoexcited carriers. (c) 2007 American Institute of Physics.

引用

页数：3

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