摘要
以硝酸铋作为铋源,偏钒酸铵作为钒源,利用水热法合成钒酸铋前驱体,并以此作为载体,采用沉淀和光还原法将Ag@AgCl负载其上,制备了Ag@AgCl/BiVO_4复合光催化剂。同时,利用X射线粉末衍射仪、紫外-可见漫反射光谱、X射线光电子能谱对所制备的复合催化剂进行表征。结果表明,BiVO_4经过负载Ag@AgCl进行修饰后,对可见光的响应吸收更加明显,复合物的光催化活性有明显提高。通过可见光照射催化降解甲基橙的实验,可发现该复合光催化剂对甲基橙的降解效率较纯BiVO_4提高了约73%。
BiVO_4 as a support was synthesized via a hydrothermal process with Bi（ NO3）3as the bismuth source and NH4VO3 as the vanadium source. Then,a composite photocatalyst,Ag@ Ag Cl/Bi VO_4,consisting of Ag@ Ag Cl loaded over Bi VO_4 was obtained via precipitation and a photoreduction method. To characterize the prepared photocatalyst,X-ray diffraction,ultraviolet-visible diffuse-reflectance spectroscopy,and X-ray photoelectron spectroscopy were used. The results showed that Bi VO_4 modified with Ag@ Ag Cl exhibited a more sensitive response to visible light and superior photocatalytic performance. The degradation efficiency of the as-prepared composite photocatalyst under visible-light irradiation increased by 73% compared to that of pure Bi VO_4.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第12期7081-7085,共5页
Chinese Journal of Environmental Engineering
基金
福建省教育厅科技项目(JB10214)
关键词
可见光
光催化
钒酸铋
银
氯化银
visible light
photocatalysis
bismuth vanadate
silver
silver chloride
