钒酸银/氧化石墨烯复合物的制备和可见光催化性能  

Synthesis of Silver Vanadium Tetraoxide/Graphene Oxide Composite and Its Visible-light Photocatalytic Performance

作　　者：孟献文 宋肖[1] 刘素芹[1] 梁英[1] 

机构地区：[1]湖北文理学院化学工程与食品科学学院,湖北襄阳441053

出　　处：《应用化学》2016年第12期1441-1447,共7页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金项目(51378183);湖北省教育厅优秀中青年科技创新团队项目(T201215)~~

摘　　要：通过改进Hummers法制备了氧化石墨烯(GO),采用液相沉淀法合成了Ag3VO4/GO复合物,利用X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见(UV-Vis)漫反射光谱等技术手段对样品进行了测试表征;并在可见光辐射下(λ≥420 nm)考察了复合物催化剂中GO含量对Ag_3VO_4光催化降解甲基橙溶液(MO)的性能影响。结果表明,掺杂质量分数2%的GO复合物光催化活性提高最显著,30 min内对MO的降解率可达到89%以上,是纯Ag_3VO_4光催化活性的3倍。Silver vanadium tetraoxide and graphene oxide（ Ag_3VO_4/ GO） composites were prepared by Hummers and liquid phase precipitation methods respectively. The obtained samples were characterized by Xray diffraction（ XRD）, scanning electron microscopy（ SEM）, and ultraviolet-visible（ UV-Vis） diffuse reflectance spectroscopy. The effect of GO content on the photocatalytic activity of Ag3VO4 was evaluated by photocatalytic degradation of methyl orange（ MO） under visible light irradiation（ λ ≥420 nm）. The results show that GO dopped Ag_3VO_4 nanoparticles can improve the degradation efficiency. At the optimal GO content（ 2% mass fraction）,the degradation rate of MO over GO/Ag_3VO_4 is 89% after 30 min of light irradiation,exhibiting 1. 6 times higher activity than that of pure Ag3_VO_4.

关 键 词：液相沉淀 Hummers法 钒酸银/氧化石墨烯复合物 可见光催化 

分 类 号：O643.3[理学—物理化学] O614.5[理学—化学]