Preparation and Characterization of BiVO4Powder by the Sol-gel Method

Abstract Bismuth vanadate (BiVO4) powder was successfully prepared by the sol-gel method. Bismuth nitrate and ammonium vanadate were used as the starting precursors with mole ratio of 1:1 in ethanol media at 70°C for 1 h. The yellow gel was calcined at 400–600°C for 2 h. The phase of BiVO4 powder was characterized by X-ray diffraction (XRD). The morphology and chemical composition of BiVO4 powder were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS). The functional groups of BiVO4 powder was identified by Fourier transform infrared spectroscopy (FTIR) and the surface area of BiVO4 powder was determined by Brunauer, Emmett and Teller technique (BET). Keywords: BiVO4 sol-gel method Acknowledgments The authors would like to thank for the financial support by the Nation Research Council of Thailand (NRCT), the Graduate School and the Faculty of Science, Maejo University and the National Research University under the Office of Higher Education Commission, Chiang Mai University for providing analytical laboratory services.