Synthesis of Au-ZnO and Pt-ZnO nanocomposites by one-step flame spray pyrolysis and its application for photocatalytic degradation of dyes

被引：185
作者：
Pawinrat, Pongsapak [1 ]
Mekasuwandumrong, Okorn [2 ]
Panpranot, Joongjai [1 ]
机构：
[1] Chulalongkorn Univ, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Fac Engn, Bangkok 10330, Thailand
[2] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhonphatom 73000, Thailand
来源：
CATALYSIS COMMUNICATIONS | 2009年 / 10卷 / 10期
关键词：
Pt-ZnO; Au-ZnO; Flame spray pyrolysis; Methylene blue; Photocatalytic activity; FERMI-LEVEL EQUILIBRATION; DOPED ZNO; PHOTODEGRADATION; NANOPARTICLES; CATALYST; FILMS; TIO2; PHOTOLUMINESCENCE; ENHANCEMENT; SUSPENSIONS;
D O I：
10.1016/j.catcom.2009.03.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Au-ZnO and Pt-ZnO nanocomposites have been synthesized by one-step flame spray pyrolysis (FSP) and characterized by X-ray diffraction (XRD), nitrogen adsorption, UV-vis spectroscopy, photoluminescence (PL), and transmission electron microscopy (TEM). The XRD and TEM results revealed that Au and Pt metallic phase were formed late during flame synthesis after ZnO was formed. Their average particle/cluster sizes were ranged between 3 and 7 nm depending on the amount loading (1 and 3 wt%). Although both of the FSP-derived Au-ZnO and Pt-ZnO possessed similar physical properties (i.e., crystallite size and specific surface area), an improvement in photocatalytic degradation of methylene blue in comparison to pure ZnO and commercial titania photocatalysts (JRC-TiO2 and P-25) was observed only for the Au-ZnO and not for the Pt-ZnO due probably to the different type of Fermi-level equilibration between Au and Pt. (C) 2009 Elsevier B.V. All rights reserved.
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页码：1380 / 1385
页数：6
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