采用维生素C作为还原剂处理氧化石墨烯制备了石墨烯粉末,用于水体中染料亚甲基蓝的吸附。通过不同反应接触时间、不同温度、不同浓度条件的控制对吸附性能进行了深入研究。利用动力学模型、热力学模型以及吸附等温线对吸附过程的内在机理进行了探讨。最大吸附量达到162.87 mg/g,并且具有优良的循环利用能力。显著的吸附量主要归结于石墨烯所具有的共轭大π键结构,可以通过π-π作用与亚甲蓝发生相互作用,以及亚甲基蓝作为阳极染料与石墨烯所带负电之间的静电作用。
Use vitamin C as the reducing agent to treat the graphene oxide and prepare graphene for the adsorption of MB in water solution. The effects of various contact time, temperatures, initial concentrations were studied to research the adsorption property. A deep discussion on the adsorption process was studied by adsorption kinetics, adsorption thermodynamic study, adsorption isotherms. The maximum adsorption capacity was 162.87 mg/g, and it also possessed excellent recycle ability. The big adsorption capacity was due to the π-π interactions between the graphene and MB, and MB as the anodic dye possesses the electrostatic force with the electronegative graphene.