摘要
本文综述了MIL-88A(Fe)及其复合物的合成方法、形貌调控及其作为异相催化剂实现光芬顿、活化PS(persulfate,过硫酸盐)和催化臭氧氧化等高级氧化过程去除水体有机污染物的研究进展.系统介绍了利用水/溶剂热法、超声法、微波法、室温搅拌法、机械化学法、重结晶法和光化学还原法制备MIL-88A(Fe)及其复合物的反应条件和产物形貌特征.MIL-88A(Fe)具有环境友好、能被可见光激发及稳定性好等特点,其表面Fe(Ⅲ)不饱和位点丰富且均匀,利于作为催化剂用于高级氧化.MIL-88A(Fe)受光激发产生的光生电子-空穴容易复合,导致其光催化性能较差.但在类芬顿、激发PS和催化臭氧氧化等体系中,添加的氧化剂作为电子受体快速消耗电子,有效克服了光生电子-空穴复合问题.此外,将MIL-88A(Fe)与其他功能材料复合可进一步改善其光生电子-空穴分离效率、提高光吸收能力及水稳定性.总之,MIL-88A(Fe)及其复合物在光芬顿、活化PS和催化臭氧氧化降解有机污染物方面具有较大的实际应用潜力.
In this review,the different fabrication strategies and the applications as heterogenous catalysts in the advanced oxidation processes like photo-Fenton,PS(persulfate)activation and catalytic ozonation of MIL-88A(Fe)and its composites are highlighted.The preparation approaches such as hydro/solvothermal method,ultrasonic method,microwave-assisted synthesis,homogeneous phase direct synthesis,mechanochemical synthesis,recrystallization and photochemical reduction along with the reaction conditions are introduced.Among them,the morphologies of as-prepared MIL-88A(Fe)and its composites are clarified.MIL-88A(Fe),an eco-friendly catalyst,can be photoexcited by visible light.There are abundant Fe(Ⅲ)unsaturated sites on the surface of MIL-88A(Fe),which are beneficial for the advanced oxidation processes.The separation of photo-generated electrons and holes can be promoted by the introduction of secondary functional materials,which may also enhance light absorption ability.It is clear that MIL-88A(Fe)and its composites have prospective potential in photo-Fenton,PS activation and catalytic ozonation for organic pollutants degradation.Finally,the future research trends of MIL-88A(Fe)and its composites are prospected.
作者
王茀学
王崇臣
WANG Fuxue;WANG Chongchen(Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation,School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《环境科学研究》
CAS
CSCD
北大核心
2021年第12期2924-2934,共11页
Research of Environmental Sciences
基金
国家自然科学基金项目(No.51878023,22176012)
北京市自然科学基金项目(No.8202016)。
