材料科学与工程学报2012，Vol.30Issue(4)：600-605,6.
水热合成单斜晶系BiVO_4可见光催化剂及其性能
Hydrothermal Synthesis and Visible-light Photocatalytic Property of Monoclinic BiVO4
摘要
Abstract
Visible light photocatalyst BiVO4 with a monoclinic microstructure was synthesized by hydrothermal method at 140℃. Effects of hydrothermal temperature, hydrothermal time and pH value of synthetic solution on the microstructure and photocatalytic property of BiVO4 were studied. The products were characterized by X-ray diffractometry （XRD）, scanning electron microscopy （SEM）, BET specific surface area and ultraviolet-visible （UV-Vis） absorption measurements. Results show that the obtained BiVO~ presents hollow-microtube framework. It was favourable to form monoclinic BiVO4 by increasing the hydrothermal temperature, raising the pH value of the solution and prolonging the reaction time. So the optimum reaction conditions for fabricating monoclinic BiVO4 was determined as following： adjusting the pH value of synthetic solution to 9, controlling hydrothermal temperature at 140~C and fixing the hydrothermal time to 6 h. The photocatalytic activity and reaction mechanism of BiVO4 was tested by photodecompostion of methylene blue under visible light illumination. Results indicate that the BiVO4 synthesized under the optimal conditions possesses quite good visible light photocatalytic activity. Meanwhile, increasing the pH value of the degradation systems is beneficial to improve photocatalytic capability of BiVO4 because of its enhancing absorption capacity and using efficiency of activated electron.关键词
BiVO4/水热法/控制合成/可见光催化Key words
BiVO4/hydrothermal/controlling synthesis/visible light photocatalytic分类
化学化工引用本文复制引用
龙金鑫,张莉莉,周守勇,赵宜江,姚超,汪信..水热合成单斜晶系BiVO_4可见光催化剂及其性能[J].材料科学与工程学报,2012,30(4):600-605,6.基金项目
江苏省自然科学基金资助项目 （）
江苏省高校自然科学重大项目资助项目 （）
淮安市科技资助项目 （）
软化学与功能材料教育部重点实验室（南京理工大学）开放基金项目资助 （）
