中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Significant photocatalytic activity enhancement of titania inverse opals by anionic impurities removal in dye molecule degradation

文献类型:期刊论文

作者Wu, Min1; Zheng, Anmin2; Deng, Feng2; Su, Bao-Lian1,3,4
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
出版日期2013-07-17
卷号138页码:219-228
关键词Inverse opal TiO2 Sulfate anion effect Dye molecule degradation Photocatalysis
英文摘要The photocatalytic behavior in dye molecule degradation of highly ordered three dimensional macroporous titania inverse opals prepared by the polystyrene spheres templating method has been investigated. The sulfate impurity stemming from K2S2O8 used as initiator for the styrene polymerization and remaining in the final materials in a form of sulfate anions was found to strongly inhibit the photocatalytic process of titania inverse opals. The mechanism of the negative effect of sulfate anionic impurity has been studied by the theoretical calculations and the comparison of samples subject to a wash process or not, the artificial addition of sulfate anions to the reaction medium and cycle experiments of samples without the washing process. Raman spectroscopy confirmed that in TiO2 inverse opal structures, sulfate ions are present in divalent forms. However, in aqueous photocatalytic medium, monovalent hydrosulfate anions can also be present. Theoretical calculations on the interaction of sulfate (mono and divalent) anions and Rhodamine B (RhB) with TiO2 inverse opal indicated that the adsorption binding energy of divalent sulfate anions on the titania surface (168 kcal/mol) is over four times as that of the Rhodamine B (36 kcal/mol) in the photocatalytic system and that of hydrosulfate anions is around 53-57 kcal/mol, still much higher than that of Rhodamine B. The strong adsorption of the anionic sulfate impurity on the surface of titania inverse opals would block the active sites and thus strongly affect the photocatalytic performance. A model of the negative action of sulfate anions has been proposed. This work leads to a new physic-chemical insight on the behavior of sulfate anions in the photocatalytic degradation of RhB and revealed that a single washing process to remove the impurity suggested significant promotion effect of the photocatalytic reaction without any surface modulations. This washing process dramatically suppressed the adsorption effect induced by the sulfate impurity and simplified the procedures, improving the photocatalytic performance. (C) 2013 Elsevier B.V. All rights reserved.
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]ORDERED MACROPOROUS TITANIA ; SENSITIZED SOLAR-CELLS ; SEMICONDUCTOR PHOTOCATALYSIS ; ENVIRONMENTAL APPLICATIONS ; PARTICLE-SIZE ; TIO2 ; NANOPARTICLES ; NANOCRYSTALS ; DIOXIDE ; SOLIDS
收录类别SCI
语种英语
WOS记录号WOS:000319087900026
源URL[http://ir.wipm.ac.cn/handle/112942/791]  
专题武汉物理与数学研究所_磁共振应用研究部
作者单位1.Univ Namur, Lab Inorgan Mat Chem CMI, B-5000 Namur, Belgium
2.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ctr Magnet Resonance, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China
3.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China
4.Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England
推荐引用方式
GB/T 7714
Wu, Min,Zheng, Anmin,Deng, Feng,et al. Significant photocatalytic activity enhancement of titania inverse opals by anionic impurities removal in dye molecule degradation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2013,138:219-228.
APA Wu, Min,Zheng, Anmin,Deng, Feng,&Su, Bao-Lian.(2013).Significant photocatalytic activity enhancement of titania inverse opals by anionic impurities removal in dye molecule degradation.APPLIED CATALYSIS B-ENVIRONMENTAL,138,219-228.
MLA Wu, Min,et al."Significant photocatalytic activity enhancement of titania inverse opals by anionic impurities removal in dye molecule degradation".APPLIED CATALYSIS B-ENVIRONMENTAL 138(2013):219-228.

入库方式: OAI收割

来源:武汉物理与数学研究所

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