水滑石作为芬顿反应催化剂的研究进展  

Research progress of LDHs as Fenton reaction catalysts

作　　者：邵适衡 韩爱娟 李亚平 刘军枫[1] Shiheng Shao;Aijuan Han;Yaping Li;Junfeng Liu(State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《中国科学：化学》2021年第5期509-520,共12页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:21975013,U1707603);中央高校基本科研业务费专项资金资助项目。

摘　　要：芬顿反应(Fenton reaction)利用H2O2与Fe2+的催化反应可快速生成高活性的·OH自由基用于有机物的降解等过程,因其无副产物的二次污染被广泛应用于环境保护和污水处理领域.但传统的均相芬顿反应中,低价金属再生效率较低,导致整体的反应效率受到限制.同时,传统均相芬顿反应因为酸性的反应条件以及铁离子的引入,从环保角度来看也不是一个理想的反应体系.近年来,水滑石(layered double hydroxides,LDHs)作为一种特殊的层状结构材料,在芬顿反应中表现出优异的催化性能,引起了人们的广泛关注.LDHs的催化活性位点通常为固定于固体表面的金属离子,可避免反应中金属离子的浸出,降低反应体系对pH的要求.同时由于水滑石层板中多元金属的可调控性,可设计制备具有多种过渡金属的协同氧化还原循环的水滑石材料,促进低价金属再生的循环反应,提高芬顿反应效率.本文主要介绍了近年来水滑石类材料作为芬顿反应催化剂的研究成果和进展,并对该领域目前面临的挑战和发展前景进行了展望.Fenton reaction utilizes the catalytic reaction of H2O2 and Fe2+ to generate highly active hydroxyl radicals(·OH) quickly to degrade organic compounds without the secondary pollution of by-products, which is widely used in the fields of environmental protection and sewage treatment. However, the difficulty of the regeneration of low-valence metals in the ordinary homogeneous Fenton reaction limits the efficiency of the overall reaction. In addition, the acidic requirements of the reaction system and the introduction of iron ions are not ideal from an environmental perspective. In recent years, layered double hydroxides(LDHs), as a unique layered material, have shown excellent catalytic performance in Fenton reaction and have attracted widespread attention. The active sites of LDHs are usually the metal ions fixed on the solid surface, which can avoid the leaching of metal ions and reduce the pH requirements of the reaction system. Besides, by adjusting the structure of the LDHs layers, a redox cycle of multiple metals can be formed,which promotes the regeneration of the low-valence metals effectively and thus improves the efficiency of the Fenton reaction. This review mainly summarizes the recent progress of LDHs materials as Fenton reaction catalysts. The challenge and prospective trends of LDHs materials as Fenton reaction catalysts are also discussed.

关 键 词：水滑石 芬顿反应 羟基自由基 多相催化剂 

分 类 号：TQ426[化学工程] X703[环境科学与工程—环境工程]