摘要
采用简单的水热法制备m-Bi_(2)O_(4),并利用XRD、XPS、SEM、TEM、UV-vis DRS、PFM等表征手段对样品结构、形貌、表面价态以及压电光催化性能进行分析.以磺胺甲基嘧啶(SM)为模拟污染物,测试了材料的压电光催化活性.结果表明,与BaTiO 3和BiOCl相比,m-Bi_(2)O_(4)表现出了较高的催化性能.在压电光协同作用60 min后,对SM的降解效率高达96.46%.通过改变光的波长条件,证实m-Bi_(2)O_(4)在光能减弱条件下仍具有较高的催化活性.此外,通过活性自由基捕获实验证实反应体系中产生了高氧化活性的超氧自由基以及少量羟基自由基和单线态氧,并提出了一种可能的压电光催化机理.
In this paper,we prepare m-Bi_(2)O_(4)via a simple hydrothermal method,and analyze its structure,morphology,surface valence and piezoelectric photocatalytic performance using characterization methods such as XRD,XPS,SEM,TEM,UV-vis DRS and PFM.Furthermore,we test the piezoelectric photocatalytic activity of the material using sulfamethazine(SM)as a simulated pollutant.The results show that m-Bi_(2)O_(4)outperforms BaTiO 3 and BiOCl in catalytic performance,indicated by its high SM degradation efficiency(96.46%)after 60 min of synergistic piezoelectric-light action,and m-Bi_(2)O_(4)still holds high catalytic activity under weakening light energy.In addition,superoxide radicals with high oxidation activity and a small amount of hydroxyl radicals and singlet oxygen have been captured in the reaction system.We also propose a possible mechanism of piezoelectric photocatalysis.
作者
朱佳威
陈浩轩
刘凤玲
郭照冰
仇鹏翔
ZHU Jiawei;CHEN Haoxuan;LIU Fengling;GUO Zhaobing;QIU Pengxiang(School of Environmental Science and Engineering/Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control/Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,China)
出处
《南京信息工程大学学报》
CAS
北大核心
2024年第4期553-561,共9页
Journal of Nanjing University of Information Science & Technology
基金
国家自然科学基金(41873016)。
