Ag/AgBr/AgI@SiO_(2) 复合气凝胶的制备与吸附/光催化性能  

Preparation and adsorption/photocatalytic performance of Ag/AgBr/AgI@SiO_(2) composite aerogel

作　　者：马闯闯 史非 刘敬肖 朱珂雅 万佳翔 崔郭昊 MA Chuangchuang;SHI Fei;LIU Jingxiao;ZHU Keya;WAN Jiaxiang;CUI Guohao(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2024年第5期330-334,共5页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金项目(51778098);辽宁省教育厅高校基本科研项目(LJKZZ20220067).

摘　　要：为了充分利用SiO_(2)气凝胶的优异吸附性能和AgBr/AgI异质结的光催化性能,通过原位合成和超临界干燥工艺制备了具有吸附/可见光催化性能的Ag/AgBr/AgI@SiO_(2)复合气凝胶材料。利用XRD、SEM、BET、DRS和电化学等表征手段对制备的复合气凝胶的晶体结构、表面形貌、孔结构、光学及电化学特性进行了表征。对四环素(TC)的吸附/可见光催化降解实验表明,复合气凝胶对四环素具有较高的吸附能力和可见光催化性能,复合气凝胶较高的可见光催化活性可归功于其拓宽了可见光吸收范围以及其高效的光生载流子分离和迁移效率。复合气凝胶表现出良好的稳定性和可循环利用性,在水处理和环境净化领域具有广阔的应用前景。In order to make full use of the excellent adsorption performance of SiO_(2) aerogel and the photocatalytic performance of AgBr/AgI heterojunction, Ag/AgBr/AgI@SiO_(2) composite aerogel (ABIS) materials with adsorption/visible light catalytic performance was prepared by in-situ synthesis and supercritical drying process. The crystal structure, surface morphology, pore structure, optical and electrochemical properties of the prepared composite aerogels were characterized by XRD, SEM, BET, DRS and electrochemical methods. The adsorption/visible light photocatalytic degradation experiment of tetracycline (TC) showed that the composite aerogel had higher adsorption capacity and visible light catalytic performance for tetracycline. The higher visible light photocatalytic activity of the composite aerogel could be attributed to its broadened visible light absorption range and its efficient photogenerated carrier separation and migration efficiency. The composite aerogels show good stability and recyclability, and have broad application prospects in the field of water treatment and environmental purification.

关 键 词：气凝胶 二氧化硅 异质结 光催化 四环素 

分 类 号：X703[环境科学与工程—环境工程]