Effects of pH on the Morphology and Photocatalytic Performance of BiVO4 Prepared Via Hydrothermal Method

Xingxing Gao, Jian Wang, Hongbo Xu, Jianglong Yu
2015 Proceedings of the 2015 International Symposium on Energy Science and Chemical Engineering   unpublished
BiVO 4 with different morphologies were synthesized via a controllable dodecylamine-assisted hydrothermal method. The effect of pH on the crystallinity, morphology and optical absorption property of BiVO 4 was investigated by X-ray diffraction (XRD),scanning electron microscopy(SEM) and UV-vis Diffuse Reflectance Spectra techniques (UV-vis DRS).The photocatalytic efficiencies were evaluated by the degradation of (MB) under visible-light irradiation. It is worthy to note that the obtained
more » ... nic scheelite BiVO 4 (m-BiVO 4 ) prepared at pH 1 possessed a spherical microstructure, low band gap energy, and exhibited the highest photocatalytic activity of the samples, decolorizing up to 98.2 % of MB upon visible light irradiation for 4h. The reason for the different photocatalytic efficiencies of the BiVO 4 samples obtained at different pH was investigated by considering the structure and morphology.
doi:10.2991/isesce-15.2015.17 fatcat:xsf52jull5f5zf47iz2frkdn5m