富含硫空位ZnIn_(2)S_(4)微米球的制备及其光催化还原Cr(VI)的研究  

Synthesis of sulfur-rich vacancy ZnIn_(2)S_(4) microspheres and study on photocatalytic reduction of Cr(VI)

作　　者：高娟 常春[1,2] GAO Juan;CHANG Chun(College of Chemistry and Materials Engineering,Bohai University,Jinzhou 121013;College of Environment and Chemical Engineering,Dalian University,Dalian 116622)

机构地区：[1]渤海大学化学与材料工程学院,锦州121013 [2]大连大学环境与化学工程学院,大连116622

出　　处：《环境科学学报》2024年第4期36-47,共12页Acta Scientiae Circumstantiae

基　　金：兴辽英才计划青年拔尖人才项目(No.XLYC1907173);辽宁省教育厅面上项目(No.LJKMZ20221835)。

摘　　要：构建空位是提高金属硫化物光催化活性的有效途径.本研究以廉价的硫脲作为硫源,通过简单的一步水热法,在160℃、6 h条件下成功制备了富含硫空位ZnIn_(2)S_(4)微米球,并通过XRD、SEM、TEM、XPS和EPR等表征手段分析了材料的组成、形貌、化学价态和硫空位等结构与性质.结果表明:具有适当的硫空位的ZI-S_(6)具有较强的可见光响应以及较高的稳定性和良好的抗干扰能力,在4 h内可还原100%的Cr(VI),其反应速率常数是ZIS-6的1.23倍.此外,通过捕获剂实验可知e^(-)和·O^(2-)在Cr(VI)还原中起主要作用.本研究为制备和改进基于ZnIn_(2)S_(4)光催化剂提供了一种有效的方法,同时也为开发高效、可持续的光催化剂提供了新的思路.The construction of vacancies is an effective strategy for enhancing the photocatalytic activity of metal sulfides.In this study,the sulfurvacancy-rich ZnIn_(2)S_(4) microspheres were successfully synthesized via a simple one-step hydrothermal method using inexpensive thiourea as the sulfur source at 160℃for 6 h.XRD,SEM,TEM,XPS,and EPR were employed for sample characterization.The results demonstrated that ZI-S_(6) with appropriate sulfur vacancy had strong visible light response,high stability and good anti-interference ability.It could reduce 100%of Cr (VI) within 4h,and its reaction rate constant was 1.23 times that of ZIS-6.In addition,it was found that e^(-)and·O^(2-)played a major role in the reduction of Cr (VI).This study can provide an effective approach for preparing and enhancing ZnIn_(2)S_(4)-based photocatalysts,and offering new insights into the development of efficient and sustainable photocatalysts.

关 键 词：ZnIn_(2)S_(4) 硫脲 硫空位 光催化 CR(VI) 

分 类 号：O643.3[理学—物理化学] X703[理学—化学]