光催化降解甲基橙及强化工艺研究进展

Research progress on photocatalytic degradation of methyl orange and enhanced catalytic process

对光催化降解甲基橙(MO)过程中催化剂、反应器、影响因素、提高光催化反应效率措施4个方面进行综述,重点总结不同催化剂对MO降解率的影响及光催化反应器的研究进展。提高光催化降解MO的关键在于催化剂表面电子-空穴的分离、转移效率以及反应器光源与溶液光透过率的匹配。据此,将现有提高光催化降解MO措施分为3类:(1)优化催化剂捕获光的能力;(2)优化反应器内光源点布置;(3)改善催化剂负载方式,提高催化剂比表面积和表面微流动特性。最后,提出提高光催化效率需从光源分布与溶液的透光性不匹配的矛盾入手,以“光均匀分布”为原则优化反应器光源布置,提高吸光过程和催化过程的协同性。

This paper summarize the photocatalytic degradation of methyl orange(MO)processes,including catalysts,reactors,influence factors,and measures to improve the efficiency of photocatalytic reactions.The efficiency of MO degradation by different catalyst systems is highlighted in the review,and advances in photocatalytic reactors are also presented.The electron-hole separation-transfer efficiency of the catalyst surface and the alignment of the reactor light source with the solution transmission rate are crucial for enhancing the photocatalytic degradation of MO.Therefore,the authors divided the currently available methods for enhancing MO photocatalytic degradation into three categories:(1)Enhancing the light absorption capacity of the composite catalyst;(2)Homogenizing the light source in the reactor;(3)Increasing the loading mechanism of the catalyst to increase the contact-specific surface area and micro-flow characteristics.The idea of increasing the efficiency of photocatalytic is presented in this paper.It is necessary to start with the discrepancy between the source distribution and the transmittance of the solution,and then optimize the source arrangement in the reactor based on the uniform light distribution.