Synthesis, characterization and photocatalytic activity of nanocomposites

被引：81
作者：
Hamrouni, Abdessalem [1 ]
Lachheb, Hinda [1 ]
Houas, Ammar [1 ,2 ]
机构：
[1] Univ Gabes, Fac Sci Gabes, URCMEP, UR11ES85, Gabes 6072, Tunisia
[2] Al Imam Mohammad Ibn Saud Islamic Univ IMSIU, Coll Sci, Dept Chem, Riyadh 11623, Saudi Arabia
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2013年 / 178卷 / 20期
关键词：
Heterojunction; ZnO-SnO2; Coprecipitation; Methylene blue; Photocatalysis; COUPLED ZNO/SNO2 PHOTOCATALYSTS; METHYLENE-BLUE; DEGRADATION; TIO2; DYES; ZNO; ZNO-SNO2; OXIDE; PHOTODEGRADATION; NANOPARTICLES;
D O I：
10.1016/j.mseb.2013.08.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocomposites of coupled ZnO-SnO2 photocatalysts were synthesized by the coprecipitation method and were characterized by X-ray diffraction, UV-vis diffuse reflectance spectroscopy, surface area analyzer and scanning electron microscopy. Their photocatalytic activity was investigated under UV, visible and solar light and evaluated using methylene blue (MB) as a model pollutant. The performance of the coupled ZnO-SnO2 photocatalysts was found to be related to the Zn/Sn molar ratio and to the calcination conditions. The photocatalyst with a Zn/Sn molar ratio of 1:0.05 calcined at 600 degrees C for 2 h showed the maximum degradation rate of MB under different lights used. Its photocatalytic activity was found to be about two times that of ZnO and about 10 times that of SnO2 which can be explained by the heterojunction effect. Charge separation mechanism has been studied. (C) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：1371 / 1379
页数：9
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