Construction of novel spherical ZnIn_(2)S_(4)-Ag-LaFeO_(3) heterostructures for enhancing photocatalytic efficiency  

作　　者：Dongsheng Jia Jiaxuan Pan Dongliang Zhang Mitang Wang Ying Li 

机构地区：[1]School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai,200093,China

出　　处：《Journal of Rare Earths》2025年第2期295-303,I0003,共10页稀土学报(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(21101107,51173107);State Key Laboratory of Pollution Control and Resource Reuse Foundation(PCRRF19017)。

摘　　要：Herein we report novel photocatalysts ZnIn_(2)S_(4)-Ag-LaFeO_(3) with the core-shell structured materials prepared by hydrothermal method.In order to improve the efficiency of photocatalytic degradation of pollutants,LaFeO_(3) was prepared by hydrothermal followed by calcination,and further Ag nanoparticle(NP)was loaded onto the spherical structure of LaFeO_(3) by photolysis of silver nitrate,and finally the spherical Znln_(2)S_(4)-Ag-LaFeO_(3) photocatalyst was prepared by hydrothermal method again.The structure and properties of the as-prepared materials were characterized by X-ray photoelectron spectroscopy,ultraviolet-visible absorption spectroscopy,X-ray diffraction,scanning electron microscopy and fluorescence spectra.The results show that the synthesized composite photocatalysts display a significant improvement in photocatalytic efficiency relative to the single LaFeO_(3) and ZnIn_(2)S_(4)and form a core-shell structure.Furthermore,the effect of the ratio of each component on the photocatalytic efficiency was investigated in detail,and it is discovered that at an Methylene Blue(MB)concentration of 0.219 mol/L,the degradation rate of MB is 95%at 120 min using 0.02 g of catalyst with an ideal ZnIn_(2)S_(4):Ag:LaFeO_(3)ratio of 10:0.5:1.The possible mechanisms to improve the photocatalytic efficiency were explored.

关 键 词：ZnIn_(2)S_(4) LaFeO_(3) PHOTOCATALYSIS DEGRADATION Core-shell structure Rare earths 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]