巯基化石墨烯对水中Pb(Ⅱ)的吸附性能研究  

Removal of Pb(Ⅱ) Ions from Aqueous Solution by Thiol-Functionalized Graphene Oxide

作　　者：周方[1] 李琼[1] 蒋新宇[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《化学通报》2017年第4期361-366,共6页Chemistry

基　　金：国家自然科学基金项目(21571191)资助

摘　　要：采用改进的Hummers法制备氧化石墨烯,在交联剂EDC作用下,巯基乙胺与氧化石墨烯上的羧基进行缩合反应,合成巯基化石墨烯。运用FTIR、SEM及XPS等手段对合成材料进行表征,结果表明,巯基乙胺成功接枝在氧化石墨烯表面。将巯基化石墨烯用于吸附去除水中的Pb(Ⅱ),结果表明,合成的巯基化石墨烯对Pb(Ⅱ)的吸附效果好,吸附量高达205.25mg/g。吸附动力学遵循准二级模型,且等温吸附数据可用Langmuir吸附等温线很好地拟合。本文报道的巯基化石墨烯对废水处理和净化有很大的潜在应用。The graphene oxide were prepared via modified Hummers method. Thiol-functionalized graphene oxide （GO-SH） was synthesized by condensation reaction of cysteamine with graphene oxide. The synthesized materials were characterized by FT-IR, SEM and XPS. The results indicated that cysteamine has been successfully grafted on the surface of graphite oxide. And then the synthesized GO-SH was used to simulate the adsorption of Pb （ Ⅱ ） in aqueous solution. Under the optimized condition, GO-SH exhibited a maximum adsorption capacity for Pb （ Ⅱ ） of 205.25 mg/g. The adsorption isotherms and kinetics matched well with the Langmuir isotherm model and pseudo-second-order equation. The GO-SH reported in this paper has great potential application in wastewater treatment and purification.

关 键 词：氧化石墨烯 巯基乙胺 铅离子 吸附 

分 类 号：O647.3[理学—物理化学] X703[理学—化学]