AgIn_(5)S_(8)/碳量子点/ZnIn_(2)S_(4)的多途径电子迁移与光催化性能  

Multi⁃pathway Photoelectron Migration and Photocatalytic Properties of AgIn_(5)S_(8)/Carbon Quantum Dots/ZnIn_(2)S_(4)

作　　者：祖雯琳 李莉[1] 黄继玮 孙英茹 马凤延[1] 曹艳珍[1] ZU Wen-Lin;LI Li;HUANG;Ji-Wei;SUN Ying-Ru;MA Feng-Yan;CAO Yan-Zhen(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar,Heilongjiang 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,齐齐哈尔161006

出　　处：《无机化学学报》2022年第6期1059-1072,共14页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21376126);黑龙江省自然科学基金(No.LH2021B031);黑龙江省教育厅基本科研业务专项(No.145109104);黑龙江省政府博士后科研启动经费(No.LBH-Q13172);齐齐哈尔大学研究生教育创新项目(No.YJSCX2020037)资助。

摘　　要：首先,借助碳量子点(CQDs)的上转换光致发光(UCPL)特性对ZnIn_(2)S_(4)进行了表面改性,再结合离子交换法制备了复合材料AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)。采用X射线衍射(XRD)、X射线光电子能谱(XPS)、紫外可见漫反射吸收光谱(UV-Vis DRS)、扫描电镜(SEM)、透射电镜(TEM)、氮气吸附-脱附、光致发光(PL)和电化学阻抗(EIS)等测试手段对复合材料的组成、结构、形貌以及表面物理化学性质等进行了表征。结果表明,该复合材料中不同组分间的协同作用导致其呈现宽光谱响应(250~800 nm)。与对比体系相比,复合材料AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)表现出明显增强的光电流密度,更小的电荷转移阻抗,较长的光生载流子寿命。以甲基橙为模型分子,在不同光源作用下进行的光催化活性研究结果显示,AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)呈现增强的光催化降解活性。同时,该复合材料在光解水性能研究中不仅表现较高的光解水制氢速率(312.09μmol·h^(-1)·g^(-1)),而且呈现良好的稳定性。Firstly,ZnIn_(2)S_(4)was modified by the up-conversion photoluminescence(UCPL)properties of carbon quantum dots(CQDs),and AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)composite was prepared by ion-exchange method.X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),UV-Vis diffuse reflectance spectroscopy(UV-VIS DRS),scanning electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen adsorption-desorption test,photoluminescence(PL),and electrochemical impedance(EIS)were used to characterize the composition,structure,morphology,surface physical,and chemical properties of the composite.The results show that the synergistic effect between the different components in the composite results in a broad spectral response(250-800 nm).Compared with the comparative system,AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)exhibited significantly enhanced photocurrent density,smaller charge transfer resistance,and prolonged photo-generated carrier lifetime.The photocatalytic activity of AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)was studied under different light sources using methyl orange as the model molecule.The results showed that AgIn_(5)S_(8)/CQDs/ZnIn_(2)S_(4)had an enhanced photocatalytic activity.At the same time,the composite not only had a high photolysis water hydrogen production capacity(312.09μmol·h^(-1)·g^(-1))but also had good stability.

关 键 词：碳量子点 上转换特性 宽光谱响应 硫铟化合物 光催化 

分 类 号：O643.36[理学—物理化学]