改性石墨烯对有机污染物的选择性吸附

Selective adsorption of organic contaminants by modified graphene

采用水合肼还原方法制得石墨烯.通过TEM,FTIR,BET,XRD等测试手段对其结构和形貌进行表征.石墨烯经聚二甲基硅氧烷改性修饰后具有超疏水性能,对水溶液中的苯酚具有优秀的吸附能力,在293K时最大平衡吸附量为153.8mg/g,吸附动力学研究表明改性石墨烯对苯酚的吸附为准二级吸附动力学模型.

Graphene was prepared by using hydrazine reduction method.Its structure and morphology were characterized by means of TEM,FTIR,BET and XRD.After its modification with polydimethylsiloxane,the graphene shows superhydrophobic properties,manifesting that the graphene is an excellent adsorbent for the absorption of phenol in aqueous solution and the maximum equilibrium adsorption capacity at 293 K was 153.8mg/g,The study of adsorptiveknoetics indicated that the adsorption of phenol onto graphene could meet the pseudo second-order adsorptive kinetic model.