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Formation of nanopore arrays on stainless steel surface by anodization for visible-light photocatalytic degradation of organic pollutants

Published online by Cambridge University Press:  05 July 2012

Weiting Zhan
Affiliation:
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Hongwei Ni*
Affiliation:
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Rongsheng Chen
Affiliation:
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Xinli Song
Affiliation:
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Kaifu Huo
Affiliation:
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Jijiang Fu
Affiliation:
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
*
a)Address all correspondence to this author. e-mail: nihongwei320@sohu.com
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Abstract

There is high scientific and technological interest to develop photocatalytic coatings on stainless steels surface to remove fouling under light radiation. In this study, a novel method is described to prepare photocleanable stainless steel by anodization to form aligned nanopore arrays (NPAs) on the surface in ethylene glycol containing perchloric acid. Perchloric acid concentration, applied voltage and anodization time of anodization process were investigated. The NPAs are mainly composed of iron (III) oxide and chromium (III) oxide. This photocleanable stainless steel has remarkable visible-light photocatalytic activities, which show potential applications particularly for outdoor purpose. Moreover, the stainless steel surface remains highly polished and exhibits good corrosion resistance after anodization.

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Articles
Copyright
Copyright © Materials Research Society 2012

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