Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (10): 1761-1766.doi: 10.1016/S1872-1508(08)60072-8

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Synthesis and Characterization of TiO2/YFeO3 and Its Photocatalytic Oxidation of Gaseous Benzene

WANG Wei-Cheng, LI Shuo, WEN Yi-Yun, GONG Mao-Chu, ZHANG Lei, YAO Yan-Ling, CHEN Yao-Qiang   

  1. Key Laboratory of Green Chemistry&Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China; School of Chemical and Biological Science and Engineering, Yantai University, Yantai 264005, Shandong Province, P. R. China
  • Received:2008-05-26 Revised:2008-06-16 Published:2008-10-08
  • Contact: CHEN Yao-Qiang E-mail:nic7501@email.scu.edu.cn

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Abstract: YFeO3 was prepared by coprecipitation method and citric acid method, and TiO2/YFeO3 heterosystem photocatalysts were synthesized by loading TiO2 sol on the surface of YFeO3 via sol-gel method. Their photocatalytic activities were evaluated by the decomposition of gaseous benzene under UV light illumination. The prepared photocatalysts were characterized by nitrogen adsorption-desorption, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-Vis diffuse reflectance spectroscopy. Results revealed that the heterosystem photocatalysts prepared by coprecipitation method showed higher activity, and the maximumconversion of benzene could reach 44.7% within 180 min. The YFeO3 samples prepared fromcoprecipitation method and citric acid method were absolutely in orthorhombic phase. The deposited titania was dispersed on the surface of carrier and a certain interaction existed between TiO2 and YFeO3. The two heterosystemphotocatalysts had narrow band-gap energies.

Key words: Photocatalysis, TiO2, YFeO3, Coprecipitation method, Citric acid method, Benzene