ICCAS OpenIR
Synthesis, characterization, and photocatalytic properties of Ag modified hollow SiO2/TiO2 hybrid microspheres
Zhao, Wei; Feng, Lili; Yang, Rong; Zheng, Jie; Li, Xingguo
2011-03-14
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume103Issue:1-2Pages:181-189
AbstractWell-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.
KeywordTio2 Hollow Spheres Ag Modified Photocatalysis
DOI10.1016/j.apcatb.2011.01.025
Indexed BySCI
Language英语
WOS IDWOS:000288884500023
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:89[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71334
Collection中国科学院化学研究所
Corresponding AuthorLi, Xingguo
AffiliationPeking Univ, BNLMS, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
Recommended Citation
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.
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