ICCAS OpenIR
Catalytic activity of iron species in layered clays for photodegradation of organic dyes under visible irradiation
Cheng, Mingming1; Song, Wenjing1; Ma, Wanhong1; Chen, Chuncheng1; Zhao, Jincai1; Lin, Jun2; Zhu, Huaiyong3
2008-01-10
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume77Issue:3-4Pages:355-363
AbstractThe iron species in layered clays are active for catalytically oxidizing synthetic dyes with H2O2 under visible irradiation (lambda > 420 nm). Three layered clays, Montmorillonite, Laponite, and Nontronite, in which the iron species exist in different chemical environment, were used to investigate the role of the iron species in the clays. It was found that the reactivity of the iron species greatly depends on their chemical environments. The exchangeable interlayer iron ions in the clay exhibit much better ability to catalyze the mineralization of malachite green (MG) than the structural iron at the centers of octahedrons that are sandwiched by two layers Of SiO4 tetrahedrons. The interactions among the foreign ligands, such as phosphate and EDTA, and the two types of iron species are dissimilar, causing the different effects of the ligands on the degradation kinetics. The EPR results show explicitly that the reaction over the two iron species proceeds through different pathways. This explains the differences in the degradation kinetics for the photodegradation of MG by H2O2 over different clays. These iron-containing clay minerals are chemically and mechanically stable, we do not observe any noticeable loss of activity and damage of the clay structure after 14 recycles. (C) 2007 Elsevier B.V. All rights reserved.
KeywordIron Species Clay Photodegradation Dye
DOI10.1016/j.apcatb.2007.08.006
Indexed BySCI
Language英语
WOS IDWOS:000252651600017
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:92[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63174
Collection中国科学院化学研究所
Corresponding AuthorZhao, Jincai
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Lab Photochem, Beijing 100080, Peoples R China
2.Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China
3.Queensland Univ Technol, Sch Phys & Chem Sci, Brisbane, Qld 4001, Australia
Recommended Citation
GB/T 7714
Cheng, Mingming,Song, Wenjing,Ma, Wanhong,et al. Catalytic activity of iron species in layered clays for photodegradation of organic dyes under visible irradiation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2008,77(3-4):355-363.
APA Cheng, Mingming.,Song, Wenjing.,Ma, Wanhong.,Chen, Chuncheng.,Zhao, Jincai.,...&Zhu, Huaiyong.(2008).Catalytic activity of iron species in layered clays for photodegradation of organic dyes under visible irradiation.APPLIED CATALYSIS B-ENVIRONMENTAL,77(3-4),355-363.
MLA Cheng, Mingming,et al."Catalytic activity of iron species in layered clays for photodegradation of organic dyes under visible irradiation".APPLIED CATALYSIS B-ENVIRONMENTAL 77.3-4(2008):355-363.
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