石墨烯的制备及其对甲苯的吸附性能

Preparation of graphene and its adsorption to toluene

采用改进的Hummers法制备了氧化石墨烯,利用SEM,FTIR,XRD等分析方法对制得的石墨烯进行表征,选取挥发性有机物中的甲苯为研究对象,进行了石墨烯吸附甲苯的实验,讨论了吸附温度及初始浓度对吸附性能的影响。表征结果显示,制得的石墨烯具有较大的比表面积及较好的吸附性能。实验结果表明,相同初始浓度下,随着温度的升高,吸附带长度增加,吸附时间缩短,吸附量降低;同一吸附温度下,随着甲苯初始吸附浓度的增加,甲苯达到吸附饱和点的时间逐渐缩短,平衡吸附量逐渐增大。

Graphene oxide was prepared by modified Hummers method. The graphene was characterized by SEM,FTIR and XRD. The toluene in volatile organic compounds was selected as the research object. The experiment of graphene adsorption to toluene was performed. The effects of adsorption temperature and initial concentration on adsorption performance was discussed. The characterization results show that the produced graphene has a large specific surface area and good adsorption performance. The experimental results show that at the same initial concentration,with the increase of temperature,the length of the adsorption tape increases,the adsorption time decreases,and the adsorption amount decreases. At the same adsorption temperature,with the increase of the initial concentration of toluene,the time for toluene to reach the adsorption saturation point is gradually shortened and the equilibrium adsorption quantity is gradually increased.