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Enhanced photocatalytic activity of sponge-like ZnFe2O4synthesized by solution combustion method
Authors:Song Sun  Xiaoyan Yang  Yi Zhang  Fan Zhang  Jianjun Ding  Jun Bao  Chen Gao
Affiliation:CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Scienceand Technology of China, Hefei, Anhui 230026, ChinaNational Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China;National Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China;National Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China;National Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China;CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Scienceand Technology of China, Hefei, Anhui 230026, ChinaNational Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China;CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Scienceand Technology of China, Hefei, Anhui 230026, ChinaNational Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China;CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Scienceand Technology of China, Hefei, Anhui 230026, ChinaNational Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology ofChina, Hefei, Anhui 230029, China
Abstract:A kind of cubic ZnFe2O4 with spinel structure was synthesized by an improved solutioncombustion method via a facile and environmentally friendly pathway and their photocatalyticactivity under visible light radiation was investigated. The particle synthesized under the ignitiontemperature of 573 K has a pure phase. While a small amount impurities, a-Fe2O3 and ZnO, wereformed in the sample during the combustion process at higher ignition temperature of 623 K. Thesynthesized ZnFe2O4 has a sponge-like porous structure and wide absorption in the visible-lightregion. The impurities a-Fe2O3 and ZnO formed in the sample probably enhance the reduction andoxidation ability and promote the separation of photo-generated electrons and holes. Comparingwith ZnFe2O4 synthesized by the conventional solid state reaction, the ZnFe2O4 derived by solutioncombustion method showed the better photocatalytic activity under visible light radiation.
Keywords:Zinc ferrite  Photocatalysis  Solution combustion  Infrared thermal image
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