BiOCl和BiOBr两种微球的溶剂热制备及其光催化性能研究  

Solvothermal preparation and photocatalytic performance of BiOCl and BiOBr microspheres

作　　者：孙国富[1] 葛素香[1] 李大鹏[1] Sun Guofu;Ge Suxiang;Li Dapeng(College of Chemical and Materials Engineering,Xuchang University,Xuchang 461000)

机构地区：[1]许昌学院化工与材料学院,许昌461000

出　　处：《化工新型材料》2022年第11期171-175,共5页New Chemical Materials

基　　金：国家自然科学基金(21507107)。

摘　　要：选用硝酸铋、氯化钾、溴化钠为反应原料,乙二醇为反应媒介,经溶剂热反应制备了花簇结构的BiOCl和BiOBr微球。反应体系引入聚乙烯吡咯烷酮(PVP)后可明显改变BiOBr微球的表面形貌和直径尺寸,生成了核桃球状的BiOBr微球。通过X射线粉末衍射、扫描电子显微镜等表征技术对所制备材料进行了表征,并以罗丹明B为模拟污染物对上述不同表面形貌的光催化剂的可见光催化性能进行了评价。结果表明:BiOCl和BiOBr微球的光催化性能接近,PVP促进了BiOBr纳米片的紧密排列并充分利用了可见光,提升了光催化活性,有利于罗丹明B产生快速的光降解作用。The bismuth oxychloride(BiOCl)and bismuh oxybromide(BiOBr)inflorescence-like microspheres were synthesized by a solvothermal method with Bi(NO_(3))_(3),KCl and NaBr as raw materials and ethylene glycol as reaction media.The addition of polyvinyl pyrrolidone(PVP)contributed to the formation of walnut-like BiOBr-PVP microspheres with the uniform diameter.The X-ray powder diffraction(XRD)and scanning electron microscope(SEM)were performed to characterize the structures of these bismuth-based photocatalysts.The rhodamine B was used as the model pollutant to assess their photocatalytic performance through visible light.The test results showed that the photocatalytic performance of BiOCl and BiOBr was almost same.However,the BiOBr-PVP microspheres showed the excellent photocatalytic performance among the three photocatalysts.The walnut-like structures composed with adjacent nanoplates were beneficial to the absorption of light and the fast degradation of rhodamine B.

关 键 词：溴氧铋 氯氧铋 溶剂热 光催化 降解 

分 类 号：TQ152[化学工程—电化学工业] TM53[电气工程—电器]