CeO2/BiVO4复合可见光催化剂的制备及其催化性能的研究  

Preparation of CeO2/BiVO4 Visible-Light Driven Composite Photocatalyst and Application in Degradation of Methylene Blue

作　　者：丁永萍[1,2] 刘旭东 武天风 赵建军 魏兵 郭玉玮[1,2] Ding Yongping;Liu Xudong;Wu Tianfeng;Zhao Jianjun;Wei Bing;Guo Yuwei(Department of Chemistry,Baotou Normal College,Baotou 014030,China;Institute of Rare Earth Applications,Department of Chemistry,Baotou Normal College,Baotou 014030,China;Department of Physical Science and Technology,Baotou Normal College,Baotou 014030,China)

机构地区：[1]包头师范学院化学学院,内蒙古包头014030 [2]包头师范学化学学院稀土应用研究所,内蒙古包头014030 [3]包头师范学院物理科学与技术学院,内蒙古包头014030

出　　处：《中国稀土学报》2020年第1期21-30,共10页Journal of the Chinese Society of Rare Earths

基　　金：内蒙古自治区自然科学基金项目(2018MS02023);大学生创新创业训练计划项目(201810131009)资助。

摘　　要：通过水热法制备了CeO2/BiVO4复合可见光催化剂,并采用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、能量色散X射线光谱(EDX)和紫外-可见漫反射光谱对其晶体结构、表面形貌、化学组成以及光谱特性等进行了表征。此外还研究了光照时间、催化剂用量、不同染料、光照强度和重复使用次数对CeO2/BiVO4复合可见光催化剂和BiVO4在可见光照射下催化降解次甲基蓝活性的影响。结果表明:当光照时间为120 min,催化剂用量为1.00 g·L^-1及光照强度为1.00 mW·cm^-2时, CeO2/BiVO4复合可见光催化剂对次甲基蓝的催化降解效果最佳,并且有较高的稳定性。CeO2/BiVO4 visible-light driven composite photocatalyst was prepared by hydrothermal method. The structure, morphology, composition and optical property of the catalysts were investigated by X-ray powder diffraction(XRD), scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy(EDX) and UV-visible diffuse reflectance spectroscopy(DRS). In addition, the effects of illumination time, amount of catalyst, different dyes, light intensity and reuse times on the activity of CeO2/BiVO4 photocatalyst and BiVO4 for the degradation of methylene blue were also investigated under visible light irradiation. The results showed that, when the illumination time is 120 min, the amount of catalyst was 1.00 g·L^-1 and the light intensity was 1.00 mW·cm^-2, the CeO2/BiVO4 catalyst has the best catalytic degradation effect on methylene blue and higher stability.

关 键 词：BIVO4 CEO2 光催化 次甲基蓝 降解率 

分 类 号：O611.4[理学—无机化学]