Noble metal-modified TiO2 thin film photocatalyst on porous steel fiber support

被引：67

作者：

Guo, Hongfan ^{[1
]}

Kemell, Marianna ^{[1
]}

Heikkila, Mikko ^{[1
]}

Leskela, Markku ^{[1
]}

机构：

[1] Univ Helsinki, Inorgan Chem Lab, Dept Chem, FI-00014 Helsinki, Finland

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2010年 / 95卷 / 3-4期

基金：

芬兰科学院;

关键词：

Porous steel fiber; Atomic layer deposition; Sputtering; TiO2; Photocatalysis; ATOMIC LAYER DEPOSITION; TITANIUM-DIOXIDE; METHYL-ORANGE; INDUCED DEGRADATION; GOLD NANOPARTICLES; AU; ENHANCEMENT; WATER; PHOTOOXIDATION; ACID;

D O I：

10.1016/j.apcatb.2010.01.014

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：

Through-porous steel fiber matrix with high specific surface area and self-support strength was examined as the support of TiO2 film photocatalyst. TiO2 was uniformly and conformally deposited onto the surface of the metal skeleton of the porous steel fiber matrix via atomic layer deposition method so that the porosity as well as gas permeability of the matrix is maintained. For further improving the photocatalytic activity, noble metals (Au and Pt/Pd alloy) were sputtered onto the surface of TiO2 photocatalyst. The photodegradation of methyl orange was used for evaluating the photocatalytic properties. The results show that compared with TiO2 films deposited on flat Si wafers, TiO2 films on the porous support display higher photocatalytic activities, owing to their higher specific surface areas. The photocatalytic activity of TiO2 on porous support was not enhanced by Au, while it was remarkably improved by Pt/Pd. The TiO2 photocatalysts were also analyzed by scanning electron microscopy and Xray photoelectron spectroscopy. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：358 / 364

页数：7

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