Mesoporous-assembled In2O3-TiO2 mixed oxide photocatalysts for efficient degradation of azo dye contaminant in aqueous solution

被引：13
作者：
Niyomkarn, Siriluck [1 ]
Puangpetch, Tarawipa [2 ]
Chavadej, Sumaeth [1 ,3 ]
机构：
[1] Chulalongkorn Univ, Petr & Petrochem Coll, Bangkok 10330, Thailand
[2] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhon Pathom 73000, Thailand
[3] Chulalongkorn Univ, Ctr Excellence Petrochem & Mat Technol, Bangkok 10330, Thailand
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2014年 / 25卷
关键词：
TiO2; In2O3; Mesoporosity; Azo dye; Photocatalytic degradation; TITANIUM-DIOXIDE PHOTOCATALYSTS; VISIBLE-LIGHT IRRADIATION; OPTOELECTRONIC PROPERTIES; HYDROGEN GENERATION; SPRAY-PYROLYSIS; MODIFIED TIO2; SOLAR-CELLS; THIN-FILMS; WATER; NANOCOMPOSITES;
D O I：
10.1016/j.mssp.2013.09.022
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This work focuses on the improvement of the photocatalytic activity of mesoporous-assembled In2O3-TiO2 mixed oxide photocatalysts for Congo Red (CR) azo dye degradation by varying the In2O3-to-TiO2 molar ratio and calcination temperature. All of photocatalysts are synthesized by a sol-gel process with the aid of a structure-directing surfactant. The results show that the incorporation of In2O3 to the mesoporous-assembled TiO2 can increase the specific surface area and total pore volume, inhibit the anatase-to-rutile phase transformation, and decrease the crystallite size of the resulting In2O3-TiO2 mixed oxide photocatalysts. The mesoporous-assembled 0.05In(2)O(3)-0.95TiO(2) mixed oxide photocatalyst with an In2O3-to-TiO2 molar ratio of 0.05:0.95 (5 mol% In2O3 incorporation) and calcined at 500 degrees C exhibits the highest CR dye degradation activity (with reaction rate constant of 0.86 h(-1)), being considerably higher than that of the commercial P-25 TiO2 powder. (C) 2013 Elsevier Ltd. All rights reserved.
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页码：112 / 122
页数：11
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