硅酸盐学报2013，Vol.41Issue(5)：720-724,5.DOI:10.7521/j.issn.0454-5648.2013.05.24
pH值对微波水热合成BiVO4微晶形貌及光学性能的影响
Influence of pH Value on Morphology and Optical Property of BiVO4 Crystallites Prepared by Microwave Hydrothermal Process
摘要
Abstract
BiVO4 crystallines with the controllable morphologies were prepared by a template-free microwave hydrothermal method using NH4VO3 and Bi(NO3)3·5H2O as raw materials. The influence of pH value on the phase, morphology and optical property of as-prepared samples was investigated. The samples were characterized by X-ray diffraction, scanning electron microscopy and ultraviolet-visible absorption spectroscopy, respectively. The results indicate that the monoclinic BiVO4 crystalline can be obtained at the pH value of 0.1-10.0, under 160 ℃ for 1 h. The morphology of the crystalline transforms from sheet to rod-like when the pH value increases. When the pH value is close to 7, the diffraction peak intensity of the (040) crystal plane is more intensive, and the optical band gap width also increases. Besides, the corresponding absorbing boundaries are shifted to a lower wavelength range.关键词
pH值/微波水热法/钒酸铋/微晶/形貌/光学特性Key words
pH value/ microwave hydrothermal method/ bismuth vanadate crystalline/ crystallite/ morphology/ optical properties分类
化学化工引用本文复制引用
孟岩,黄剑锋,费杰,王勇,曹丽云,吴建鹏..pH值对微波水热合成BiVO4微晶形貌及光学性能的影响[J].硅酸盐学报,2013,41(5):720-724,5.基金项目
陕西省自然科学基金(No.2010JM6001) （No.2010JM6001）
陕西省教育厅专项项目(No.2010JK444):陕西省国际科技合作重点项目(No.2011KW-11) （No.2010JK444）
陕西科技大学研究生创新基金资助项目. （）
