Effect of structure on the photocatalytic activity of Pt-doped TiO2 nanotubes

被引：35

作者：

Su, Yaling ^{[1
]}

Deng, Yirong ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 23期

基金：

美国国家科学基金会;

关键词：

TiO2; nanotubes; Structure; Pt-doping; Catalytic properties; ANODIC-OXIDATION; TITANIUM; ARRAYS; ELECTROLYTES; PLATINUM; MINERALIZATION; DECOMPOSITION; DEGRADATION; FABRICATION; REACTIVITY;

D O I：

10.1016/j.apsusc.2011.05.133

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly ordered TiO2 nanotubes with different tube length were fabricated by anodization using C2H2O4 center dot 2H(2)O containing 0.5 wt.% NH4F (electrolyte A) and anhydrous dimethyl sulfoxide containing 1% HF (electrolyte B), respectively. Then cathodic reduction method was used to dope Pt in TiO2 nanotubes in chloroplatinic acid. The results indicated that cathodic reduction could efficiently platinize TiO2 nanotubes. Pt-doped TiO2 nanotubes with the longer length had the higher photocatalytic activity for degrading methyl orange under UV and visible irradiation. The longer tube length has a positive effect on the photocatalytic activity of Pt-doped TiO2 nanotubes. Besides, as the content of anatase further decreases, the photocatalytic activity drops gradually due to the reduction reaction in the surface area. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：9791 / 9795

页数：5

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