Boosting Photocatalytic Oxygen Evolution:Purposely Constructing Direct Z-Scheme Photoanode by Modulating the Interface Electric Field

作     者：LI Yinyin WU Qiannan ZHANG Kai HU Bin LIN Yanhong WANG Dejun XIE Tengfeng LI Yinyin;WU Qiannan;ZHANG Kai;HU Bin;LIN Yanhong;WANG Dejun;XIE Tengfeng

作者机构：Institute of Physical ChemistryCollege of ChemistryJilin UniversityChangchun 130012P.R.China State Key Laboratory of Inorganic Synthesis and Preparative ChemistryCollege of ChemistryJilin UniversityChangchun 130012P.R.China College of ChemistryJilin UniversityChangchun 130012P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2020年第36卷第6期

页      面：1059-1067页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.51572106 21773086 21872063) 

主　　题：Ti-ZnFe2O3/Ti-Fe2O3 Z-Scheme Interface electric field Heterojunction photoanode 

摘      要：Ti-Fe2O3 photoanode has received widespread attention in photoelectrochemical(PEC)water spilling because of its optimized oxidative and reductive capability of composites ***,its low efficiency could limit its ***,in order to improve the efficiency of PEC water spilling,the all-solid-state direct Z-scheme Ti-ZnFe2O4/Ti-Fe2O3(TZFO/Ti-Fe2O3)nanorod arrays composited with the ideal energy band structure are synthesized by modulating the Fermi level of TZFO for PEC water *** photophysical methods in this work,including the Kelvin probe measurement and transient photovoltage spectroscopy(TPV)measurement,are applied to explore the migration behavior of electric charges at the enhanced interface electric ***,the Z-scheme charge transfer mechanism of TZFO/Ti-Fe2O3 photoanode is proved *** from the desirable charge transfer at interface electric field,the TZFO/Ti-Fe2O3 exhibits the outstanding photocatalytic oxygen evolution reaction(OER)performance,and the photocurrent of 60TZFO/Ti-Fe2O3 photoanode reaches 2.16 mA/cm^2 at 1.23 V *** hydrogen electrode(RHE),which is three times higher than that of pure Ti-Fe2O3 *** work provides a facile approach of modulating interface electric field to optimize the Z-scheme charge-transfer process.