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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2012,Vol.28>> Issue(09)>> 2155-2161     doi: 10.3866/PKU.WHXB201206262         中文摘要
CATALYSIS AND SURFACE SCIENCE
Preparation of Silver Doped TiO2 Hollow Nanoparticles and Characterization of Their Structures and Photocatalytic Properties
JI Ping-Li, WANG Jin-Gang, ZHU Xiao-Li, KONG Xiang-Zheng
School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
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Anionic polystyrene (PSt) latex particles were synthesized by emulsion polymerization of methacrylic acid and styrene (St). The anionic PSt particles were surface treated with vinyl trimethoxysilane in a mixture of ethanol and water. PSt/TiO2 composite particles doped with Ag2O were then prepared through hydrolysis of tetrabutyl titanate and AgNO3 using the surface treated PSt particles as templates. Hollow Ag-TiO2 particles were successfully prepared by treating the PSt/TiO2 composite microspheres at 180 °C, after which they were dried and calcined at 500 °C. The morphology of the PSt/TiO2 particles and crystal structure of the Ag-TiO2 hollow particles were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Photocatalytic activity of the Ag-TiO2 hollow particles for Rhodamine B (RhB) degradation was tested under ultraviolet (UV, 365 nm) and UV-visible (370-760 nm) light. Under UV light, RhB degradation was increased by about 11% when Ag-TiO2 particles with molar ratio nAg/nTi of 0.1% were used compared with pure TiO2 hollow particles. Under UV-visible light, RhB degradation was increased by about 30% for Ag-TiO2 composite particles with nAg/nTi of 1.0% and 2.0%.



Keywords: Polystyrene nanoparticle template   Surface modification   Ag-TiO2 hollow particle   Photocatalytic property   Rhodamine B photodegradation  
Received: 2012-04-05 Accepted: 2012-06-25 Publication Date (Web): 2012-06-26
Corresponding Authors: WANG Jin-Gang, KONG Xiang-Zheng Email: chm_wangjg@ujn.edu.cn; xzkong@ujn.edu.cn

Fund: The project was supported by the National Natural Science Foundation of China (20874040, 20904016) and Technology Project for High Education Institutions in Shandong Province, China (J10LB09).

Cite this article: JI Ping-Li, WANG Jin-Gang, ZHU Xiao-Li, KONG Xiang-Zheng. Preparation of Silver Doped TiO2 Hollow Nanoparticles and Characterization of Their Structures and Photocatalytic Properties[J]. Acta Phys. -Chim. Sin., 2012,28 (09): 2155-2161.    doi: 10.3866/PKU.WHXB201206262

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