摘要
采用改进的Hummers法制备了氧化石墨烯,将其采用水合肼还原获得石墨烯,以氧化石墨烯和石墨烯为吸附剂,分别采用透射电镜(TEM),傅里叶变换红外光谱(FT-IR),拉曼光谱(RS)和X射线衍射光谱(XPS)对阴阳离子的不同吸附性能进行了分析表征.结果表明:两吸附剂对罗丹明B的吸附能力较甲基橙强,最大吸附容量分别为551.2 mg/g和476.2 mg/g,各吸附体系中的吸附行为都符合Langmuir等温吸附模型和二级动力学反应特征.
Graphene oxide was prepared by a modified Hummer＇s method and reduced by hydrazine to prepare graphene. The graphene oxide and graphene were used as adsorbents for anionic and cationic dyes. The system was characterized by TEM, FF-IR, Raman spectroscopy and XPS and the results showed that the maximum adsorption capacities of graphene oxide and graphene for Rhodamine B were 551.2 mg/g and 476.2 mg/g respectively, higher than that for methyl orange. The adsorption isotherms fitted well with the Langmuir isotherm model and the adsorption processes followed a pseudo second-order model.
出处
《中南民族大学学报（自然科学版）》
CAS
2014年第2期5-9,共5页
Journal of South-Central University for Nationalities：Natural Science Edition
基金
国家自然科学基金资助项目(21077037
21107027
21177044)
