摘要
近年来,大量研究表明过硫酸盐高级氧化技术(PS-AOPs)是处理污水中难生物降解有机污染物的有效策略.寻求高活性、高稳定性、低成本的催化剂是实现过硫酸盐高效活化降解新污染物的关键.相比于传统金属纳米颗粒催化剂,单原子催化剂(SAC)在PS-AOPs中表现出超快的反应速率、较低的金属负载量以及强金属与载体相互作用等优点.更重要的是,SAC具有原子级分布的活性中心,以便于从原子甚至电子层次下研究非均相催化体系中的构效关系和多种反应机制.然而,目前SAC在PS-AOPs中的研究尚处于起步阶段.本文重点综述了SAC活化过硫酸盐产生氧化活性物质的驱动机制,对结构调控与催化性能的相关性进行了系统总结,深入了解结构-性能关系,指出了精确调整催化剂活性位点的策略,并对相关研究领域未来的机遇和挑战提出了展望.
In recent years,persulfate-based advanced oxidation processes(PS-AOPs)have emerged as effective strategies for treating refractory organic pollutants in sewage.The key to achieving efficient persulfate activation for degrading such pollutants lies in the search for highperformance,highly stable,and cost-effective catalysts.In comparison to traditional metal nanoparticle catalysts,single-atom catalysts(SAC)used in PS-AOPs offer several advantages,including ultra-fast reaction rate,low metal loading capacity,and strong metal-carrier interaction.SAC exhibit atomic-level distribution of active centers,enabling the study of structure-activity relationships and multiple reaction mechanisms in heterogeneous catalytic systems at the atomic or even electronic level.However,research on SAC in PS-AOPs is still in its infancy.The review focuses on the activation mechanism of SAC in PS-AOPs to produce oxidation active species.The correlation between structural regulation and catalytic performance was systematically summarized,the structure-performance relationship was deeply understood,and the strategy of precise adjustment of catalyst active site was pointed out.Finally,the review provides insights into the opportunities and challenges in related research fields.
作者
郭若男
吕宁磬
GUO Ruonan;LYU Ningqing(Chinese Research Academy of Environmental Sciences,Beijing,100012,China)
出处
《环境化学》
CAS
CSCD
北大核心
2024年第3期834-845,共12页
Environmental Chemistry
基金
国家重点研发计划项目(2022YFC3700900)资助。
关键词
过硫酸盐
高级氧化技术
单原子催化剂
反应机理
persulfate
advanced oxidation processes
single-atom catalyst
reaction mechanism
