SiO2/Ag2S复合物制备及其去除亚甲基蓝性能研究  

Preparation of SiO2/Ag2S Composites and Its Removal Properties of Methylene Blue

作　　者：徐泽忠 曹显志 韩成良[3] 谢劲松[3] XU Zezhong;CAO Xianzhi;HAN Chengliang;XIE Jingsong(Analysis and Testing Center, Hefei University, Hefei 230601, China;School of Materials Science and Engineering, Southeast University, Nanjing 211189, China;Department of Chemical and Materials Engineering, Hefei University, Hefei 230601, China)

机构地区：[1]合肥学院分析测试中心,合肥230601 [2]东南大学材料科学与工程学院,南京211189 [3]合肥学院化学与材料工程系,合肥230601

出　　处：《硅酸盐通报》2020年第3期980-985,共6页Bulletin of the Chinese Ceramic Society

基　　金：2018年合肥学院自然科学发展基金重点项目(18ZR08ZDB)。

摘　　要：采用直接沉淀法在室温下成功制备了SiO2/Ag2S复合物。采用XRD,SEM和BET等手段对复合产物的物相、形态和吸附性能进行了表征与分析。结果表明,SiO2/Ag2S复合物是以链状Ag2S颗粒为基体,通过SiO2微球包覆在其表面或者嵌入到颗粒内部而形成的。比表面积测试结果表明,随着SiO2含量的增加,SiO2/Ag2S复合物的比表面积也相应增大。对上述制备的SiO2/Ag2S复合物进行吸附染料的动力学和热力学实验研究。结果显示,室温下SiO2/Ag2S复合物脱除亚甲基蓝吸附动力学曲线符合准一阶动力学方程,吸附热力学规律满足Freundlich模型。SiO2/Ag2S composites were successfully prepared by direct precipitation method at room temperature.The phase,morphology and adsorption properties of as-prepared composites were characterized and analyzed by XRD,SEM and BET.Results show that SiO2/Ag2S composites are formed from coating SiO2 microspheres on the surface or embedding into chain-like Ag2S particles.The specific surface area tests indicate that the specific surface area of SiO2/Ag2S composites increase with the increasing contents of SiO2.Adsorption kinetics and thermodynamics experiments were carried out on SiO2/Ag2S composites for removal of dyes in water.Results show that the adsorption kinetics curves of SiO2/Ag2S composites for removing methylene blue at room temperature conforms to the quasi-first-order kinetic equation,and the adsorption thermodynamics law satisfies Freundlich model.

关 键 词：SiO2/Ag2S复合物 直接沉淀法 亚甲基蓝 吸附 

分 类 号：TQ034[化学工程]