摘要
目前针对TiO_(2)和BiVO_(4)的改性方法有很多,但是构建异质结是最为简单的一种优化措施之一.BiVO_(4)/TiO_(2)由于二者可以相互修饰,并且具有低成本、无毒、稳定的优点,被广泛应用于光催化领域.构建理想的BiVO_(4)/TiO_(2)异质结可以进一步推动复合材料在光催化领域的发展.本文首先从化学溶液法和物理沉积法出发阐述了常用的制备方法,主要包括水热法、溶胶凝胶法、原子沉积法、磁控溅射沉积以及脉冲激光沉积;基于此,介绍了BiVO_(4)/TiO_(2)在光催化降解、光催化分解水以及光催化还原CO_(2)中的应用及相关机理;然后,从质量分数比、晶面工程、形貌调控、助催化剂、元素掺杂等方面介绍了优化BiVO_(4)/TiO_(2)光催化性能的方法.通过对过去的相关研究进行整理与分析,旨在为BiVO_(4)/TiO_(2)这一类宽窄带隙半导体构成的复合光催化材料提供新的研究方向和思路.
The entire research work attempts to make a simple combing and summary of the composite of BiVO_(4)and TiO_(2)photocatalytic semiconductor materials in the past few decades.There has a sesquipedalian history in photocatalytic degradation and photocatalytic water splitting,with the in-depth understanding and research of BiVO_(4)and TiO_(2).It was provided that the photocatalytic activity of the composite material formed by the coupling of BiVO_(4)and TiO_(2)was many times higher than that of a pure BiVO_(4)or TiO_(2).This review encompasses several advancements made in research progress of BiVO_(4)/TiO_(2)composite materials.In the paper of BiVO_(4)/TiO_(2),BiVO_(4)/TiO_(2)photocatalytic composite is introduced from three aspects.Firstly,the preparation process of BiVO_(4)/TiO_(2)samples via variant preparation methods is introduced,which provides the guidelines for the future work in the field of the preparation of BiVO_(4),TiO_(2)or BiVO_(4)/TiO_(2).Subsequently,the characteristics of BiVO_(4)/TiO_(2)composite are systematically discussed,simultaneously the photocatalytic activity of BiVO_(4)/TiO_(2)can increase in a prominent and growing photocatalysis field.Finally,the aggregate photocatalytic mechanism of BiVO_(4)/TiO_(2)is depicted.It is expected that the correlated tests can theoretically explain the intrinsic mechanism of BiVO_(4)/TiO_(2)or similar composite semiconductor photocatalytic materials to enhance photocatalytic efficiency.This review may benefit researchers and engineers in the arena of material for promoting and developing the application of composite semiconductor photocatalytic materials in the field of photocatalysis.The whole paper aims to comprehensively summarize and sort out the important physical and chemical knowledge of BiVO_(4)/TiO_(2)composite in the past.What’s more,problems and challenges on BiVO_(4)/TiO_(2)composite materials are proposed,geared toward developing more advanced composite semiconductor photocatalysis,as well as to gain some new insights and point to some possible directions,to guide designing advanced photocatalysts.How to further improve the photocatalytic activity of BiVO_(4)/TiO_(2)is still the core problem that we need to continue to solve.Looking forward to the future research on BiVO_(4)/TiO_(2)composites in the field of photocatalysis,we can improve and perfect from the following some aspects.The photocatalytic activity of BiVO_(4)/TiO_(2)or similar semiconductor composites is maximized as much as possible.Investigate the effect of BiVO_(4)/TiO_(2)growth mode on its photocatalytic activity using different preparation methods;the relevant tests of the BiVO_(4)/TiO_(2)energy band arrangement as well as its determination are still to be further investigated;the change of band arrangement of doped BiVO_(4)/TiO_(2)composites is considered to enhance the photocatalytic activity;enhancing the conversion rate of BiVO_(4)/TiO_(2)to light and inhibiting photogenerated electrons and hole recombination are the key to improve the photocatalytic activity.
作者
李慧
唐鹏
彭亚茹
师玉鑫
李国强
Hui Li;Peng Tang;Yaru Peng;Yuxin Shi;Guoqiang Li(School of Physics and Electronics,Henan University,Kaifeng 475004,China)
出处
《科学通报》
EI
CAS
CSCD
北大核心
2023年第27期3654-3669,共16页
Chinese Science Bulletin
基金
国家自然科学基金(12074100)资助。
