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A new heterogeneous catalytic system for wastewater treatment: Fe-immobilized polyelectrolyte microshells for accumulation and visible light-assisted photooxidative degradation of dye pollutants
Tao, Xia1; Su, Jingmei1; Wang, Lingxuan2; Chen, Jian-Feng3
2008-02-04
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
ISSN1381-1169
Volume280Issue:1-2Pages:186-193
AbstractFe-immobilized polyelectrolyte microshells have been successfully constructed by alternative adsorption of Fe(III) and alginate sodium (ALG) onto the precursor shells composed of chitosan (CHI) and ALG templated on melamine formaldehyde (MF) particles. Confocal laser scanning microscopy (CLSM) directly demonstrated that the as-synthesized (ALG/CHI)(4)(ALG/Fe)(n) (n = 1, 2) shells could accumulate efficiently rhodamine B (RhB), methylene blue (MB) and acridine orange (AO) in well-defined internal space under moderate conditions via a simple mix processing. Further, H(2)O(2) could cross the Fe-immobilized shell walls and react with the dyes concentrated in the interior of shells under visible radiation. The photodegradation of dyes accumulated in the microshells in the presence of H(2)O(2) was characterized by UV-vis adsorption spectra and CLSM. More importantly, the photooxidative reaction occurring in the Fe-immobilized microshells can be performed at a wide range of pH from acid to neutral media, which is superior to the conventional Fenton reaction that allows taking effect only under acid condition of pH <4. Electron paramagnetic resonance (EPR) and other studies into the mechanism of the light-activated reaction process give tentative evidence that distinct from the photoreaction occurring in neutral medium, the photoreaction taking place in confined microshells in acid medium proceeds mainly through HO(center dot) radicals with high oxidative potential. (C) 2007 Elsevier B.V. All rights reserved.
KeywordDyes Iron Microshells Photodegradation Self-assembly
DOI10.1016/j.molcata.2007.11.006
Indexed BySCI
Language英语
WOS IDWOS:000253186500025
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63604
Collection中国科学院化学研究所
Corresponding AuthorTao, Xia
Affiliation1.Beijing Univ Chem Technol, Key Lab Nanomat, Minist Educ, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing 100080, Peoples R China
3.Beijing Univ Chem Technol, Res Ctr, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Tao, Xia,Su, Jingmei,Wang, Lingxuan,et al. A new heterogeneous catalytic system for wastewater treatment: Fe-immobilized polyelectrolyte microshells for accumulation and visible light-assisted photooxidative degradation of dye pollutants[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2008,280(1-2):186-193.
APA Tao, Xia,Su, Jingmei,Wang, Lingxuan,&Chen, Jian-Feng.(2008).A new heterogeneous catalytic system for wastewater treatment: Fe-immobilized polyelectrolyte microshells for accumulation and visible light-assisted photooxidative degradation of dye pollutants.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,280(1-2),186-193.
MLA Tao, Xia,et al."A new heterogeneous catalytic system for wastewater treatment: Fe-immobilized polyelectrolyte microshells for accumulation and visible light-assisted photooxidative degradation of dye pollutants".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 280.1-2(2008):186-193.
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