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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 improved Hummers method was used to prepare graphene oxide. Under the action of cross-linking agent EDC, mercaptoethylamine was condensed with carboxy groups of graphene oxide to synthesize thiol-graphene. The synthesized materials were characterized by FTIR, SEM and XPS. The results showed that the mercaptoethylamine was successfully grafted on the graphene oxide surface. The results showed that the adsorption of Pb (Ⅱ) by the synthesized thiol graphene was good and the adsorption capacity was up to 205.25mg / g. Adsorption kinetics follows a quasi-two-stage model, and isothermal adsorption data are well fit using the Langmuir adsorption isotherm. The thiolated graphene reported in this paper has great potential applications for wastewater treatment and purification.