Piezoelectric potential activated interfacial electric field in BiFeO_(3)@BaTiO_(3)heterojunction for rapid and round-the-clock photocatalytic degradation of organic pollutants  

作　　者：Mingtong Li Jianhua Zhou Rui Di Zhixiang Zhang Xiaojiang Mu Xiaoyang Wang Yufei Gu Lifen Su Jing Liu Chengyan Liu Changlai Yuan Lei Miao 

机构地区：[1]Guangxi Key Laboratory of Information Materials,Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials,School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China [2]Novel Battery Materials Research Center of Engineering Technology,State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [3]School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China [4]Anhui Province Key Laboratory of Environment-friendly Polymer Materials,School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China

出　　处：《Journal of Advanced Ceramics》2024年第12期2030-2042,共13页先进陶瓷(英文)

基　　金：supported by the National Natural Science Foundation of China(Nos.52173094 and U21A2054);the Natural Science Foundation of Guangxi Province(No.2019GXNSFFA245010)l the Scientific and Technological Plan of Guilin City(No.20220110-1).

摘　　要：The highly efficient degradation and purification of organic pollutants in wastewater by photocatalysis is still challenging.In this study,a piezoelectric potential-activated interfacial electric field(IEF)was constructed to endow BiFeO_(3)@BaTiO_(3)(BFO@BTO)heterojunction with the ability to serve as a round-the-clock photocatalyst for polluted water remediation.BFO@BTO heterojunction is composed of BiFeO_(3)nanoparticles decorated on the surface of BaTiO_(3)nanorods,which shortens the carrier migration path.More importantly,the IEF can be activated and reconstructed under ultrasonic wave irradiation,leading to a lower potential barrier and enhanced separation efficiency for photogenerated carriers.The degradation rate constant k value of BFO@BTO heterojunction reached 0.038 min^(−1),which was 1.9 and 7.0 times greater than that of piezocatalysis and photocatalysis alone,respectively.It also exhibited excellent stability in three light‒dark cycles for high concentrations(25 mg·L^(−1))of rhodamine B(RhB)and tetracycline hydrochloride(TC).This study provides a promising strategy for designing highly active photoassisted piezocatalysts for environmental energy utilization and round-the-clock catalysis.

关 键 词：photoassisted piezocatalyst BiFeO_(3)@BaTiO_(3)(BFO@BTO)heterojunction interfacial electric field(IEF) roundthe-clock catalysis organic pollutant degradation 

分 类 号：TB3[一般工业技术—材料科学与工程]