Synthesis, characterization, and photocatalytic properties of Ag modified hollow SiO2/TiO2 hybrid microspheres

doi:10.1016/j.apcatb.2011.01.025

CORC > 化学研究所 > 中国科学院化学研究所

	Synthesis, characterization, and photocatalytic properties of Ag modified hollow SiO2/TiO2 hybrid microspheres
	Zhao, Wei; Feng, Lili; Yang, Rong; Zheng, Jie; Li, Xingguo
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2011-03-14
卷号	103 期号:1-2 页码:181-189
关键词	Tio2 Hollow Spheres Ag Modified Photocatalysis
ISSN号	0926-3373
DOI	10.1016/j.apcatb.2011.01.025
英文摘要	Well-defined Ag modified hollow SiO2/TiO2 hybrid spheres were successfully prepared through a two-step hydrothermal synthesis based on polystyrene templates followed by calcination. The employed protocol involves successive coating of the functionalized polystyrene (PS) template with SiO2 and TiO2 layers, followed by Ag doping using AgNO3 as the Ag source. Finally, a calcination process is carried out for the elimination of the PS core, thermal decomposition of AgNO3 to yield Ag nanoparticles and crystallization of the amorphous TiO2 layer simultaneously to acquire the final products. With this method, a complete, homogeneous and smooth hollow SiO2/TiO2 hybrid structure with uniformly dispersed Ag nanoparticles was formed. Photocatalytic properties of the fabricated Ag modified hollow SiO2/TiO2 hybrid spheres has been investigated for the degradation of rhodamine B (RhB). Ag deposition significantly enhanced the RhB photodegradation under visible light irradiation due of the Schottky barrier formed at the Ag-TiO2 interface, which serve as the electron trap, facilitating the separation of electrons and holes. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000288884500023
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/71333]
专题	中国科学院化学研究所
通讯作者	Li, Xingguo
作者单位	Peking Univ, BNLMS, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Wei,Feng, Lili,Yang, Rong,et al. Synthesis, characterization, and photocatalytic properties of Ag modified hollow SiO2/TiO2 hybrid microspheres[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2011,103(1-2):181-189.
APA	Zhao, Wei,Feng, Lili,Yang, Rong,Zheng, Jie,&Li, Xingguo.(2011).Synthesis, characterization, and photocatalytic properties of Ag modified hollow SiO2/TiO2 hybrid microspheres.APPLIED CATALYSIS B-ENVIRONMENTAL,103(1-2),181-189.
MLA	Zhao, Wei,et al."Synthesis, characterization, and photocatalytic properties of Ag modified hollow SiO2/TiO2 hybrid microspheres".APPLIED CATALYSIS B-ENVIRONMENTAL 103.1-2(2011):181-189.