How photocatalytic activity of the MAO-grown TiO2 nano/micro-porous films is influenced by growth parameters?

被引：54

作者：

Bayati, M. R. ^{[2
,3
]}

Golestani-Fard, F. ^{[2
,3
]}

Moshfegh, A. Z. ^{[1
,4
]}

机构：

[1] Sharif Univ Technol, Dept Phys, Tehran, Iran

[2] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran, Iran

[3] Iran Univ Sci & Technol, Ctr Excellence Adv Mat, Tehran, Iran

[4] Sharif Univ Technol, Inst Nanosci & Nanotechnol, Tehran, Iran

来源：

APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 13期

关键词：

Oxide materials; Titanium dioxide; Photocatalysis; Micro-arc oxidation; PLASMA ELECTROLYTIC OXIDATION; MICRO-ARC OXIDATION; CERAMIC COATINGS; TI-6AL-4V ALLOY; ANATASE TIO2; MESOPOROUS TITANIA; METHYLENE-BLUE; DEPOSITION; NANOSTRUCTURE; DEGRADATION;

D O I：

10.1016/j.apsusc.2010.02.011

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：

Pure titania porous layers consisted of anatase and rutile phases, chemically and structurally suitable for catalytic applications, were grown via micro-arc oxidation (MAO). The effect of applied voltage, process time, and electrolyte concentration on surface structure, chemical composition, and especially photocatalytic activity of the layers was investigated. SEM and AFM studies revealed that pore size and surface roughness of the layers increased with the applied voltage, and the electrolyte concentration. Moreover, the photocatalytic performance of the layers synthesized at medium applied voltages was significantly higher than that of the layers produced at other voltages. About 90% of methylene blue solution was decomposed after 180 min UV-irradiation on the layers produced in an electrolyte with a concentration of 10 g l (1) at the applied voltage of 450 V. (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：4253 / 4259

页数：7

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