Rational Design of LDH/Zn_(2)SnO_(4) Heterostructures for Efficient Mineralization of Toluene Through Boosted Interfacial Charge Separation  

作　　者：Ben Lei Wen Cui Peng Chen Ruimin Chen Yanjuan Sun Ki-Hyun Kim Fan Dong 

机构地区：[1]Research Center for Environmental and Energy Catalysis,Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 611731,China [2]College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China [3]Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313001,China [4]School of Resources and Environment,University of Electronic Science and Technology of China,Chengdu 611731,China [5]Department of Civil and Environmental Engineering,Hanyang University,222 Wangsimni-Ro,Seoul 04763,Korea [6]State Centre for International Cooperation on Designer Low carbon and Environmental Materials(CDLCEM),School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Energy & Environmental Materials》2023年第1期317-324,共8页能源与环境材料（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(21822601,22176029,22172019);the Sichuan Natural Science Foundation for Distinguished Scholars(2021JDJQ0006);the 111 Project(B20030);the Funda-mental Research Funds for the Central Universities(ZYGX2019Z021);KHK acknowledges support made by a grant from the National Research Foundation of Korea(NRF)funded by the Ministry Of Science And ITC(MSIT)Of The Kor-ean Government(Grant No:2021R1A3B1068304).

摘　　要：It is crucial to efficiently separate and transport photo-induced charge carriers for the effective implementation of photocatalysis toward environmental remediation.A rational design strategy is proposed to validate such proposition through the construction of an interfacial structure in the form of LDH/Zn_(2)SnO_(4) heterostructures in this research.The interfacial charge transfer on LDH/Zn_(2)SnO_(4) is greatly promoted via the unique charge transfer pathway,as characterized by transient photocurrent responses,X-ray photoelectron spectroscopy,electron paramagnetic resonance spectrum,and photoluminescence analysis.As such,it contributes to the generation of reactive oxygen species(ROS)and the activation of reactants for the mineralization of toluene.According to the in situ DRIFTS spectra analysis,the accumulation of benzoic acid takes place possibly through the partial oxidation of the methyl group on toluene at the interface of the LDH/Zn 2 SnO 4 heterostructure.This process can greatly promote the photocatalytic oxidation of toluene with the enhanced ring-opening efficiency.The LDH/Zn 2 SnO 4 is thus demonstrated as superior photocatalyst against toluene(removal efficiency of 89.5%;mineralization of 83.1%;and quantum efficiency of 4.55×10^(−6) molecules/photon).As such,the performance of this composite far exceeds that of their individual components(e.g.,P25,pure Mg-Al LDH,or Zn_(2)SnO_(4)).This study is expected to offer a new path to the interfacial charge transfer mechanism based on the design of highly efficient photocatalysts for air purification.

关 键 词：HETEROSTRUCTURE interfacial charge transfer photocatalysis toluene degradation 

分 类 号：TB332[一般工业技术—材料科学与工程]