A new heterogeneous catalytic system for wastewater treatment: Fe-immobilized polyelectrolyte microshells for accumulation and visible light-assisted photooxidative degradation of dye pollutants

doi:10.1016/j.molcata.2007.11.006

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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, Xia 1; Su, Jingmei 1; Wang, Lingxuan 2; Chen, Jian-Feng 3
刊名	JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
	2008-02-04
卷号	280 期号:1-2 页码:186-193
关键词	Dyes Iron Microshells Photodegradation Self-assembly
ISSN号	1381-1169
DOI	10.1016/j.molcata.2007.11.006
英文摘要	Fe-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.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000253186500025
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/63603]
专题	中国科学院化学研究所
通讯作者	Tao, Xia
作者单位	1.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
推荐引用方式 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.