He Xiufang, Marken Frank, Vertova Alberto, Minguzzi Alessandro
Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy.
Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AYUK.
J Environ Manage. 2025 Jun;385:125583. doi: 10.1016/j.jenvman.2025.125583. Epub 2025 May 6.
Wastewater globally is a significant concern for environmental health and for the sustainable management of water resources. Catalysed based advanced oxidation processes (AOP), as a relatively low operation cost and high removal efficiency of pollutants method, has a promising potential to treat the wastewater. Among the numerous catalysts, Layered Double Hydroxides (LDHs) stands out for lamellar structure, high charge density, and tuneable properties. Meanwhile, oxygen vacancies engineering could modulate the electronic properties of materials and create active centres to regulate the poor charge transfer capability of LDHs. In this regard, this review is focused on how to create and confirm the oxygen vacancies, as well as the applications of the wastewater treatment from different AOPs. It starts with the synthesized of oxygen vacancies via chemical reduction method, plasma etching method, hydrothermal treatment method, ion doping strategy. Followed by the description of characterization methods, including EPR, XPS, XAS, Raman. Finally, the role of oxygen vacancies in LDHs for contaminant removal across various systems, including photocatalysis, electrocatalysis, Fenton reactions, and sulfate radical-based processes, was thoroughly examined and analyzed.
全球废水问题是环境卫生和水资源可持续管理的重大关注点。基于催化的高级氧化工艺（AOP）作为一种运行成本相对较低且污染物去除效率高的方法，在废水处理方面具有广阔的应用前景。在众多催化剂中，层状双氢氧化物（LDH）因其层状结构、高电荷密度和可调性质而脱颖而出。同时，氧空位工程可以调节材料的电子性质，并创建活性中心来改善LDH电荷转移能力较差的问题。在这方面，本综述聚焦于如何产生和确认氧空位，以及不同AOP在废水处理中的应用。首先介绍了通过化学还原法、等离子体蚀刻法、水热处理法、离子掺杂策略合成氧空位的方法。接着描述了表征方法，包括电子顺磁共振（EPR）、X射线光电子能谱（XPS）、X射线吸收光谱（XAS）、拉曼光谱。最后，全面考察和分析了氧空位在LDH用于各种体系（包括光催化、电催化、芬顿反应和基于硫酸根自由基的过程）中去除污染物的作用。
