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.

引用

页码：1371 / 1379

页数：9

共 45 条

[1] Synthesis and structural features of mesoporous NiO/TiO2 nanocomposites prepared by sol-gel method for photodegradation of methylene blue dye [J].

Ahmed, M. A. .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2012, 238 :63-70

[2] Methylene blue: Dangerous dye for neonates [J].

Albert, M ;

Lessin, MS ;

Gilchrist, BF .

JOURNAL OF PEDIATRIC SURGERY, 2003, 38 (08) :1244-1245

[3] Photocatalytic degradation of gaseous trichloroethene using immobilized ZnO/SnO2 coupled oxide in a flow-through photocatalytic reactor [J].

An, TC ;

Zhang, ML ;

Wang, XM ;

Sheng, GY ;

Fu, JM .

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 2005, 80 (03) :251-258

[4] CORRELATION OF PHOTOCURRENT-VOLTAGE CURVES WITH FLAT-BAND POTENTIAL FOR STABLE PHOTOELECTRODES FOR PHOTOELECTROLYSIS OF WATER [J].

BOLTS, JM ;

WRIGHTON, MS .

JOURNAL OF PHYSICAL CHEMISTRY, 1976, 80 (24) :2641-2645

[5] Degradation pathways of ethyl violet by photocatalytic reaction with ZnO dispersions [J].

Chen, Chiing-Chang .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2007, 264 (1-2) :82-92

[6] Preparation and activity evaluation of p-n junction photocatalyst NiO/TiO2 [J].

Chen Shifu ;

Zhang Sujuan ;

Liu Wei ;

Zhao Wei .

JOURNAL OF HAZARDOUS MATERIALS, 2008, 155 (1-2) :320-326

[7] UV-induced photocatalytic degradation of azo dyes by organic-capped ZnO nanocrystals immobilized onto substrates [J].

Comparelli, R ;

Fanizza, E ;

Curri, ML ;

Cozzoli, PD ;

Mascolo, G ;

Agostiano, A .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 60 (1-2) :1-11

[8]

Couto SR, 2002, CHEMOSPHERE, V46, P83

[9] A review on non metal ion doped titania for the photocatalytic degradation of organic pollutants under UV/solar light: Role of photogenerated charge carrier dynamics in enhancing the activity [J].

Devi, L. Gomathi ;

Kavitha, R. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2013, 140 :559-587

[10] A survey of photocatalytic materials for environmental remediation [J].

Di Paola, Agatino ;

Garcia-Lopez, Elisa ;

Marci, Giuseppe ;

Palmisano, Leonardo .

JOURNAL OF HAZARDOUS MATERIALS, 2012, 211 :3-29

← 1 2 3 4 5 →