氧化石墨烯/海藻酸钙复合纤维对水溶液中亚甲基蓝的吸附研究  

Removal of Methylene Blue from Aqueous Solution by Graphene Oxide/calcium Alginate Composite Fibers

作　　者：王永昊[1] 孙清华 杜秋菊[1] 孙建坤[1] 杨晓霞[1] 李延辉[1] 王宗花[1] 夏延致[1] 

机构地区：[1]青岛大学纤维新材料与现代纺织国家重点实验室培育基地,青岛266071 [2]青州市水利局,青州262514

出　　处：《青岛大学学报（自然科学版）》2013年第2期51-56,共6页Journal of Qingdao University(Natural Science Edition)

基　　金：国家重点基础研究计划"973"项目(批准号:2012CB722705);青岛市科技发展计划(批准号:12-1-4-2-23-jch)资助

摘　　要：采用湿法纺丝法制得氧化石墨烯/海藻酸钙复合纤维。研究了接触时间、溶液pH值和温度对复合材料吸附亚甲基蓝性能的影响。在室温下,初始质量浓度为80mg/L氧化石墨烯/海藻酸钙复合纤维对亚甲基蓝的吸附量可达114.9mg/g。采用Langmuir和Freun-dlich模型对等温吸附数据进行拟合发现,等温吸附数据更符合Freundlich模型。动力学研究表明吸附过程符合准二级模型。Graphene oxide/calcium alginate （GO/CA） composite fibers were prepared by wet spinning. Ad- sorption of methylene blue （MB） onto GO/CA composite fibers were studied by investigating the influencing factors such as contact time, pH values, initial concentration of the dye and temperature. The adsorption capacity of MB onto CA/GO fibers could reach 114.90 mg/g at the initial MB concentration of 80 mg/ L and 298 K. Experimental data fit the Freundlich model better than the Langmuir model. Kinetics study showed that adsorption process of MB onto CA/GO fits the pseudo-second-order model. Thermodynamic study revealed that the adsorption reaction was a spontaneous and exothermic process.

关 键 词：氧化石墨烯 纤维 亚甲基蓝 吸附 动力学 

分 类 号：O647.3[理学—物理化学] O636[理学—化学]