钒氧化物光催化降解有机染料的研究进展

Research Progress on the Photocatalytic Degradation of Organic Dyes With Vanadium Oxide

半导体光催化技术被认为是治理有机污染物最有前途的技术之一,其核心是开发新型高效的光催化剂。钒氧化物在光催化分解有机污染物方面有着广泛应用。综述了近年来国内外的纳米钒氧化物、金属钒酸盐、钒氧化物复合材料在降解有机染料中的应用。钒基光催化剂的催化性能受到颗粒尺寸、形貌、结构和表面性质等的影响,而制备技术和改性策略可以调控这些因素。分析总结了钒基光催化剂的制备技术以及提高光催化性能的改性策略;讨论了各种制备技术的优缺点以及钒氧化物复合材料改性策略中Ⅱ型异质结、S型异质结、p-n异质结、Z方案异质结降解有机染料的电子转移情况,提出了光催化降解有机染料存在的问题以及面临的挑战。

Semiconductor photocatalysis is considered as one of the most promising technologies for treating organic pollutants,and its core task is to develop new and efficient photocatalysts.Vanadium oxide is widely used in the photocatalytic decomposition of organic pollutants.The paper summarizes the applications of nano-vanadium oxide,metal vanadate and vanadium oxide composites in the degradation of organic dyes at home and abroad in recent years.The catalytic performance of vanadium-based photocatalyst is affected by the particle size,morphology,structure and surface properties,which can be regulated by preparation techniques and modification strategies.The preparation techniques of vanadium-based photocatalysts and the modification strategies to improve photocatalytic performance are further analyzed and summarized.A discussion is carried out on the advantages and disadvantages of various preparation techniques as well as the electron transfer of typeⅡheterojunction,S type heterojunction,p-n type heterojunction,Z-scheme heterojunction for the degradation of organic dyes in the modification strategy of vanadium oxide composites,and the shortcomings and challenges in the photocatalytic degradation of organic dyes are also proposed.