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Preparation, characterization and photocatalytic activity of nano-sized ZnO/SnO2 coupled photocatalysts
Wang, C; Zhao, JC; Wang, XM; Mai, BX; Sheng, GY; Peng, P; Fu, JM
2002-12-06
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume39Issue:3Pages:269-279
AbstractThe nano-sized coupled oxides ZnO/SnO2 in a molar ratio of 2:1 (Z(2)S) and 1:1 (ZS) Were prepared using the co-precipitation method and characterized with X-ray diffraction (XRD), UV-VIS diffuse reflectance spectroscopy and specific surface area (Brunauer-Emmett-Teller (BET)). Their photocatalytic activities were also evaluated using methyl orange (MO) as a model organic compound. The isothermal adsorption behavior of MO on Z(2)S and the factors affecting the photocatalytic activity, such as the heat-treating temperature for the photocatalyst, the pH value of the reaction suspension and the addition of NaCl, KNO3 and K2SO4 into the suspension, have been studied. It is found that the change in phase of Z(2)S occurs with the calcination temperature. The band gap energy value observed by UV-VIS diffuse reflectance spectroscopy is 3.15 eV for Z2S compared with those of 3.12 eV for ZS, 3.17 eV for ZnO and 2.53 eV for SnO2. The isothermal adsorption behavior is a two-stage process. The photocatalytic degradation rate of MO on Z(2)S is faster than that on ZS and ZnO by 40.2 and 66.1%, respectively. A schematic diagram of photocatalytic activity is also presented to explain the results. (C) 2002 Elsevier Science B.V. All rights reserved.
KeywordPhotocatalyst Zinc Oxide Tin Oxide Coupled Nano-crystalline Water Purification Methyl Orange
Indexed BySCI
Language英语
WOS IDWOS:000180317100008
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/78176
Collection中国科学院化学研究所
Corresponding AuthorWang, C
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, C,Zhao, JC,Wang, XM,et al. Preparation, characterization and photocatalytic activity of nano-sized ZnO/SnO2 coupled photocatalysts[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2002,39(3):269-279.
APA Wang, C.,Zhao, JC.,Wang, XM.,Mai, BX.,Sheng, GY.,...&Fu, JM.(2002).Preparation, characterization and photocatalytic activity of nano-sized ZnO/SnO2 coupled photocatalysts.APPLIED CATALYSIS B-ENVIRONMENTAL,39(3),269-279.
MLA Wang, C,et al."Preparation, characterization and photocatalytic activity of nano-sized ZnO/SnO2 coupled photocatalysts".APPLIED CATALYSIS B-ENVIRONMENTAL 39.3(2002):269-279.
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