BiVO_(4)/ZnFe_(2)O_(4)同型异质结光阳极的构筑及其光电催化分解水性能  

Construction and photoelectrochemical water oxidation performance of BiVO_(4)/ZnFe_(2)O_(4) homotypic heterojunction photoanode

作　　者：樊萌萌 文晓江 陶紫阳 赵强[1] 李晋平[1] 刘光[1] FAN Meng-Meng;WEN Xiao-Jiang;TAO Zi-Yang;ZHAO Qiang;LI Jin-Ping;LIU Guang(Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学,气体能源高效清洁利用山西省重点实验室,太原030024

出　　处：《无机化学学报》2023年第1期23-31,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21878204);山西省重点研发计划项目(国际合作项目No.201903D421073)资助。

摘　　要：光生电子-空穴对的复合被认为是限制BiVO_(4)材料光电催化转换效率的重要原因之一。基于此,通过简单的水热-煅烧方法构筑了BiVO_(4)/ZnFe_(2)O_(4)同型异质结光阳极,BiVO_(4)/ZnFe_(2)O_(4)复合光阳极在1.23 V(vs RHE)下的光电流密度为3.33 mA·cm^(-2),较纯BiVO_(4)提升了2倍(1.20 mA·cm^(-2))。相关的结构及性能测试表明,BiVO_(4)和ZnFe_(2)O_(4)形成了带隙错开的n-n异质结,使得光生载流子得到有效分离,更有效地参与水氧化过程,进而提高了BiVO_(4)的光电催化水分解性能。The combination of photogenerated electron-hole pairs is considered one of the important reasons for limiting the photoelectrocatalytic conversion efficiency of BiVO_(4)photoanode.In this work,BiVO_(4)/ZnFe_(2)O_(4)homotypic heterojunction was constructed by a simple hydrothermal method and calcination process.The obtained BiVO_(4)/ZnFe_(2)O_(4)photoanode achieved an excellent photocurrent density of 3.33 mA·cm^(-2)at 1.23 V(vs RHE),which was 2 times higher than that of pure BiVO_(4)(1.20 mA·cm^(-2)).Related structure and performance tests showed that BiVO_(4)and ZnFe_(2)O_(4)can form a bandgap staggered n-n heterojunction,which enables the photogenerated carriers to be effectively separated and participate in the water oxidation process,thus improving the photoelectrochemical water oxidation activities of BiVO_(4)photoanode.

关 键 词：BiVO_(4) ZnFe_(2)O_(4) 光阳极 光电水氧化 异质结 

分 类 号：TQ116.21[化学工程—无机化工]