Z型异质结Cu_(2)O/Bi_(2)MoO_(6)的构建及光催化降解性能  

Cu_(2)O/Bi_(2)MoO_(6) Z⁃type heterojunction:Construction and photocatalytic degradation properties

作　　者：赵强[1,2] 郭智楠 李淑英 王俊丽 李作鹏[1,2] 贾治芳 王科伟[1,2] 郭永 ZHAO Qiang;GUO Zhinan;LI Shuying;WANG Junli;LI Zuopeng;JIA Zhifang;WANG Kewei;GUO Yong(School of Chemistry and Chemical Engineering,Shanxi Datong University,Datong,Shanxi 037009,China;Shanxi Province Union laboratory of Clean Energy Materials,Shanxi Datong University,Datong,Shanxi 037009,China)

机构地区：[1]山西大同大学化学与化工学院,大同037009 [2]山西省清洁能源材料联合实验室,大同037009

出　　处：《无机化学学报》2024年第5期885-894,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21908135,21975146,52203266);山西省省筹资金资助回国留学人员科研项目(No.2020-134,2022-173)资助。

摘　　要：通过水热法制备出一系列Z型异质结Cu_(2)O/Bi_(2)MoO_(6)新型光催化剂。采用扫描电子显微镜、粉末X射线衍射、红外光谱、紫外可见吸收光谱等表征手段研究了催化剂的形貌、结构性质和光电化学性质,并以四环素(TC)为降解目标污染物,进一步探究了其催化效率。实验结果表明,Cu_(2)O的加入提高了复合催化剂的光催化性能,其中20%Cu_(2)O/Bi_(2)MoO_(6)复合催化剂(Cu_(2)O和Bi_(2)MoO_(6)的质量比为20%)降解效果最好,100 min内可降解95%的TC。Cu_(2)O与Bi_(2)MoO_(6)之间的协同作用使其可以吸收更多的可见光,所构建的Z型异质结改变了电子转移途径,提高了电子与空穴的分离效率,光催化活性显著提高。通过自由基捕获实验和能带结构,分析了Z型异质结Cu_(2)O/Bi_(2)MoO_(6)复合催化剂光催化降解TC可能的机理。A series of Cu_(2)O/Bi_(2)MoO_(6) photocatalysts with Z‐type heterojunction were prepared by hydrothermal method.The morphology,structural properties,and photoelectrochemical properties of the catalyst were characterized by scanning electron microscopy,powder X‐ray diffraction,IR spectroscopy,UV‐Vis absorption spectroscopy,etc.The photocatalytic properties were investigated by tetracycline(TC)degradation.The experimental results showed that the photocatalytic performance of the composite was enhanced by adding Cu_(2)O.Among them,20%Cu_(2)O/Bi_(2)MoO_(6) composite(The mass ratio of Cu_(2)O and Bi_(2)MoO_(6) was 20%.)exhibited the best degradation efficiency and 95%of TC was degraded within 100 min.The possible mechanism of photocatalytic degradation of TC by the Cu_(2)O/Bi_(2)MoO_(6) composite was analyzed through free radical capture experiments and band structure analysis.The absorption of visible light is enhanced by the synergistic effect between Cu_(2)O and Bi_(2)MoO_(6) and the transfer pathway of electrons is changed by the constructed Z‐type heterojunction.Thus,the separation efficiency of the electron‐hole is improved and the photocatalytic activity is enhanced significantly.

关 键 词：光催化剂 钼酸铋 氧化亚铜 Cu_(2)O/Bi_(2)MoO_(6) Z型异质结 四环素 

分 类 号：O614.121[理学—无机化学] O614.532[理学—化学] O614.612