上转换材料用于光降解研究的进展

Research Progress of Upconversion Materials for Photodegradation

上转换材料与TiO_(2)、g-C_(3)N_(4)、ZnO 等光电材料复合,可以产生吸收光谱“红移”的效果,从而提高光催化降解过程对可见光的利用率。 大量研究不同程度地证实了这种作用,体现在上转换复合催化剂在可见光条件下对罗丹明 B、亚甲基蓝和甲基橙等有机物的光降解效率的提高。 今后,可以扩大降解底物的选择范围,对降解产物进行研究,增加对挥发性有机物光降解的研究,考察单位污染物光照强度和外源性氧化剂对光催化剂性能的影响。

The combination of upconversion materials and photoelectric materials,such as TiO_(2),g-C_(3)N_(4),and ZnO leads to " red shift" of absorption spectrum,thus increase the use ratio of visible light in the photocatalytic degradation of organic pollutants.A large number of studies substantiated,at different level,this effect,which is reflected in the improvement of efficiency of the composite catalysts to the photodegradation of rhodamine b,methylene blue,and methyl orange,etc,under visible light.In future,it is necessary to enlarge the range of choice of degradation substrates,to study carefully the degradation products,to increase the research on photodegradation of volatile organic compounds,to investigate the effects of illumination intensity and exogenous oxidants on the photocatalyst performances.