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Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation
W. S. Tang; Y. Su; X. X. Wang; Q. Li; S. A. Gao; J. K. Shang
2014
Source PublicationRsc Advances
ISSN2046-2069
Volume4Issue:57Pages:30090-30099
AbstractA novel superparamagnetic Ag@silver-based salt photocatalyst, MFNs@SiO2@Ag4SiW12O40/Ag, was created, which demonstrated highly efficient photocatalytic performance under visible light illumination in both the degradation of methylene blue (MB) and the disinfection of Escherichia coli (E. coli) bacteria. In this composite photocatalyst, well-dispersed, superparamagnetic magnesium ferrite nanoparticles (MFNs) were used as the core because of their easy magnetic separation capability. A passive SiO2 mid-layer was used to separate MFNs and Ag4SiW12O40 and form a strong bond with silver ions for their loading after -SH surface modification. The Ag4SiW12O40 layer was subsequently formed by the reaction with silicotungstic acid to avoid the commonly adopted calcination procedure after deposition/precipitation, and silver nanoparticles were formed on the surface of Ag4SiW12O40 layer after UV irradiation to further enhance their photocatalytic performance and stability under visible light illumination. The surface modification on the passive SiO2 mid-layer and the bridging procedure for material loading developed in our approach could be readily applied to other material systems for the creation of novel composite materials with various functions.
description.department[tang, wenshu ; su, yu ; wang, xiaoxin ; li, qi ; gao, shian ; shang, jian ku] chinese acad sci, inst met res, shenyang natl lab mat sci, environm funct mat div, shenyang 110016, liaoning provin, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, champaign, il 61801 usa. ; li, q (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, environm funct mat div, 72 wenhua rd, shenyang 110016, liaoning provin, peoples r china. ; qili@imr.ac.cn
KeywordHydrogen-production Highly Efficient Irradiation Water Semiconductor Oxide Decomposition Nanoparticles Adsorption Evolution
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73386
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
W. S. Tang,Y. Su,X. X. Wang,et al. Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation[J]. Rsc Advances,2014,4(57):30090-30099.
APA W. S. Tang,Y. Su,X. X. Wang,Q. Li,S. A. Gao,&J. K. Shang.(2014).Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation.Rsc Advances,4(57),30090-30099.
MLA W. S. Tang,et al."Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation".Rsc Advances 4.57(2014):30090-30099.
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