Abstract:

The porous composite photocatalyst combines the adsorption ability and photocatalytic activity of porous materials, so that the antibiotics of low concentration can be adsorbed and then degraded on the surface of the photocatalytic active sites, after which the adsorption ability of these composites can be regenerated in situ. By regulating the structure of the photocatalytic active site and the carrier, the prepared photocatalysts could have a wide light absorption range (including visible light) and can effectively inhibit the photoelectron-hole pair recombination. This paper summarized the multiple photocatalytic system conformed by conventional semiconductors and new porous materials including graphene, metal organic framework material (MOFs), porous organic polymers (POPs). The latest research progress on the photodegradation of antibiotics and other organic pollutants were also introduced. This paper expounded the design of multiple photocatalytic composites, the optimization of the control factors of degradation process, the outstanding antibiotics degradation performance and the mechanism. In addition, the problems in structure design and performance evaluation of photocatalytic materials were summarized, and the future research directions of photocatalytic materials were prospected. The development of photocatalysis technology will be effectively promoted by using photoresponsive porous organic polymer to improve the performance of photocatalytic composites and by the engineering application of powder photocatalytic materials.

Key words: composite, catalyst, degradation, antibiotic, mechanism

摘要：

多孔复合材料光催化体系集多孔材料的吸附性能和光催化活性，可将水体中浓度较低的抗生素富集在光催化活性位表面进行高效降解，同时吸附性能得以原位再生。通过对光催化活性体与载体的结构调控，可获得更宽的吸光范围（包括可见光）且有效抑制光生电子-空穴对复合。本文总结了基于新型多孔材料包括石墨烯、金属有机框架材料（MOFs）、多孔有机聚合物（POPs）等与传统半导体构筑的多元光催化体系及其对水体中抗生素等有机污染物光降解的最新研究进展，阐述了多元光催化体系设计思路、降解过程优化控制因素、抗生素降解去除性能及其产生优异性能的机理。此外，还总结了当前复合光催化剂在结构设计和性能评价层面存在的问题，最后对光催化材料的研究方向进行了展望，借助光响应的多孔有机聚合物提升复合光催化剂性能以及粉末光催化剂材料的工程化应用探究将有效促进光催化技术的发展。

关键词: 复合材料, 催化剂, 降解, 抗生素, 机理