Photocatalytic degradation of gaseous toluene over hollow 鈥渟pindle-like鈥?伪-Fe₂O₃ loaded with Ag

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• 作者：Hong Li^a ; ^b ; Qidong Zhao^a ; Xinyong Li^a ; ^d ; ^{xyli@dlut.edu.cn} ; Yong Shi^a ; Zhengru Zhu^c ; Moses Tade^d ; Shaomin Liu^d ; ^{shaomin.liu@curtin.edu.au}
• 关键词：A. Composites ; B. Chemical synthesis ; C. Electron microscopy ; C. Infrared spectroscopy ; D. Catalytic properties
• 刊名：Materials Research Bulletin
• 出版年：2012
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：June, 2012
• 卷：47
• 期：6
• 页码：1459-1466
• 文件大小：1314 K

摘要

In this work, hollow 鈥渟pindle-like鈥?伪-Fe₂O₃ nanoparticles were synthesized by a hydrothermal route. The Ag/伪-Fe₂O₃ catalyst was prepared based on the spindle-shaped 伪-Fe₂O₃ with CTAB as the surfactant, which showed excellent photoelectric property and photocatalytic activity. The structural properties of these samples were systematically investigated by X-ray powder diffraction, scanning electronic microscopy, transmission electronic microscopy, energy-dispersive X-ray spectra, and UV-Vis diffuse reflectance spectroscopy techniques. The photo-induced charge separation in the samples was demonstrated by surface photovoltage measurement. The photocatalytic performances of the Ag/伪-Fe₂O₃ and 伪-Fe₂O₃ samples were comparatively studied in the degradation of toluene under xenon lamp irradiation by in situ FTIR spectroscopy. Benzaldehyde and benzoic acid species could be observed on the 伪-Fe₂O₃ surface rather than Ag/伪-Fe₂O₃ surface. The results indicate that the Ag/伪-Fe₂O₃ sample exhibited higher photocatalytic efficiency.