Nanostructured BiVO4 Derived from Bi-MOF for Enhanced Visible-light Photodegradation  

作　　者：CHEN Jianfei CHEN Xiaoyu ZHANG Xing YUAN Yao BI Ruyi YOU Feifei WANG Zumin YU Ranbo 

机构地区：[1]Department of Physical Chemistry,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,P.R.China [2]State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,P.R.China [3]Key Laboratory of Advanced Material Processing&Mold,Ministry of Education,Zhengzhou University,Zhengzhou 450002,P.R.China

出　　处：《Chemical Research in Chinese Universities》2020年第1期120-126,共7页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.21671016,51872024,51932001);the China Post-doctoral Science Foundation(No.2019M650849).

摘　　要：BiVO4,a promising visible-light responding photocatalyst,has aroused extensive research interest because of inexpensiveness and excellent chemical stability.However,its main drawback is the poor photoinduced charge-transfer dynamics.Building nanostructures is an effective way to tackle this problem.Herein,we put forward a new method to prepare nanostructured BiVO4 from Bi-based metal-organic frameworks[Bi-MOF(CAU-17)]precursor.The as-prepared material has a rod-like morphology inherited from the Bi-MOF sacrificial template and consists of small nanoparticle as building blocks.Compared with its counterparts prepared by conventional methods,MOF-derived nanostructured BiVO4 shows better light absorption ability,narrower bandgap,and improved electrical conductivity as well as reduced recombination.Consequently,BiVO4 nanostructure demonstrates high photocatalytic activity under visible light towards the degradation of methylene blue.Methylene blue can be degraded up to 90%within 30 min with a reaction rate constant of 0.058 min-1.Moreover,the cycling stability of the catalyst is excellent to withstand unchanged degradation efficiency for at least 5 cycles.

关 键 词：BIVO4 NANOSTRUCTURE Metal-organic framework Ternary metal oxide Photocatalysis 

分 类 号：O64[理学—物理化学]