二硫代氨基甲酸盐改性GO材料及其对Cu^(2+)的吸附性能  

Dithiocarbamate Modified GO Material and Its Adsorption Performance for Cu^(2+)

作　　者：杨伟杰 李杰 李艳霞 赵辉 YANG Weijie;LI Jie;LI Yanxia;ZHAO Hui(School of Chemistry and Chemical Engineering,Zhoukou Normal University,Zhoukou 466001,Henan Province,China)

机构地区：[1]周口师范学院化学化工学院,河南周口466001

出　　处：《吉林大学学报（理学版）》2024年第2期444-451,共8页Journal of Jilin University:Science Edition

基　　金：河南省自然科学基金青年科学基金(批准号:232300420397);周口师范学院高层次人才科研启动经费研究项目(批准号:ZKNUC2016024)。

摘　　要：将三乙烯四胺(TETA)接枝到氧化石墨烯(GO)表面,再与CS+(2)反应,制备得到基于TETA的二硫代氨基甲酸盐改性GO材料(GO-TETA-DTC).采用红外光谱仪、元素分析仪和扫描电子显微镜对GO-TETA-DTC进行表征分析,并研究该材料对Cu^(2+)的吸附性能,考察溶液pH值、Cu^(2+)初始质量浓度、吸附时间和温度对吸附效果的影响.结果表明:GO-TETA-DTC对水中Cu^(2+)的吸附过程遵循准二级动力学方程、颗粒内扩散方程以及Langmuir方程;从Langmuir方程计算得到的GO-TETA-DTC对Cu^(2+)的最大吸附量为294.12 mg/g;吸附过程以吸热和熵增的形式进行.The dithiocarbamate modified graphene oxide(GO)material(GO-TETA-DTC)based on triethylenetetramine(TETA)was prepared by grafting TETA onto the surface of GO firstly and then reacting it with CS+(2).The GO-TETA-DTC was characterized and analyzed by infrared spectrometer,element analyzer and scanning electron microscope.We studied the adsorption performance of the material on Cu^(2+),and investigated the effects of pH values of solution,initial mass concentration of Cu^(2+),adsorption time and temperature on adsorption effects.The results show that the adsorption process of Cu^(2+)in water by GO-TETA-DTC follows the quasi-second order kinetic equation,the intra-particle diffusion equation and Langmuir equation.The maximum adsorption capacity of GO-TETA-DTC for Cu^(2+)calculated from Langmuir equation is 294.12 mg/g.The adsorption process takes place in the form of heat absorption and entropy increase.

关 键 词：石墨烯 二硫代氨基甲酸盐 铜离子 吸附 

分 类 号：O69[理学—化学] X506[环境科学与工程—环境工程]