Effective adsorption of 2,4-dichlorophenol on hydrogenated graphene: kinetics and isotherms
Effective adsorption of 2,4-dichlorophenol on hydrogenated graphene: kinetics and isotherms作者机构:Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology
出 版 物:《Chinese Science Bulletin》 (Chin. Sci. Bull.)
年 卷 期:2014年第59卷第34期
页 面:4752-4757页
核心收录:
学科分类:081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金:supported by the National Basic Research Program of China(2011CB936002)
主 题:吸附能力 吸附动力学 吸附等温线 二氯苯酚 石墨 氢化 Freundlich模型 Langmuir模型
摘 要:The effective adsorption capability of a hydrogenated graphene(H-Gr) was demonstrated. The H-Gr was firstly prepared by heating graphene(Gr) in a hydrogen flow at 1,000 °C. The specific surface area, layer number, zeta potential, surface defects, surface compounds groups and elemental ratio of H-Gr were *** 2,4-dichlorophenol as a target pollutant, the adsorption ability of H-Gr was evaluated. The results showed that the adsorption kinetics followed the pseudosecond-order equation well. For the adsorption isotherms,the equilibrium data of H-Gr were found to fit to Langmuir model, which was different from the Freundlich model of Gr. The adsorption capacity of H-Gr was high to287.01 mg/g, almost three times as much as that of Gr,which was benefit from the increase of specific surface area and zeta potential. This work suggests that H-Gr may be a potential candidate for the adsorption of aromatic compounds from water and has great prospect for practical application.