Synthesis of nanocrystalline Ga-TiO2 powders by mild hydrothermal method and their visible light photoactivity

被引：27

作者：

Liu, Xuemei ^{[1
]}

Khan, Matiullah ^{[1
,2
]}

Liu, Wenxiu ^{[1
]}

Xiang, Wei ^{[1
]}

Guan, Ming ^{[1
]}

Jiang, Peng ^{[1
]}

Cao, Wenbin ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Dept Inorgan Nonmetall Mat, Beijing 100083, Peoples R China

[2] KUST, Dept Phys, Kohat 26000, Pakistan

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 02期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Ga-doped TiO2; Hydrothermal method; Optimal doping; Visible light photocatalysis; PHOTOCATALYTIC ACTIVITY; HYDROGEN-PRODUCTION; DOPED TIO2; DEGRADATION; GA; PHOTODEGRADATION; ACID; DYES; CONVERSION; DIOXIDE;

D O I：

10.1016/j.ceramint.2014.10.151

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, nano-sized gallium doped titanium dioxide (Ga-TiO2) powders with different dopant concentrations (0.1, 0.6 and 1.2 mol%) were synthesized by a mild hydrothermal method dwelling at 150 degrees C for 10 h without any post heat treatment. The synthesized samples were characterized by X-ray diffraction (XRD), Brunauer-Emment-Teller (BET) specific surface area, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible light diffuse-reflection spectra (DRS). The photocatalytic activities were evaluated via photocatalytic decolorization of methyl orange under 420-780 nm visible light irradiation. Due to the small particle size, large specific surface area, improved visible light response and enhanced separation of photo-excited carriers, Ga-TiO2 photocatalysts exhibit better photocatalytic activity than that of Degussa P25 or un-doped TiO2, which prepared under the same processing conditions. Among all the Ga doped TiO2 photocatalysts, 0.6 mol% Ga TiO2 shows the best photo-decolorization efficiency reaching up to 82%. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3075 / 3080

页数：6

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