点击次数：

论文类型：期刊论文

发表时间：2014-12-01

发表刊物：CHINESE SCIENCE BULLETIN

收录刊物：SCIE、PKU、ISTIC、Scopus

卷号：59

期号：34

页面范围：4752-4757

ISSN号：1001-6538

关键字：Hydrogenated graphene; 2,4-DCP; Kinetics; Isotherms

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 A degrees C. The specific surface area, layer number, zeta potential, surface defects, surface compounds groups and elemental ratio of H-Gr were investigated. Taking 2,4-dichlorophenol as a target pollutant, the adsorption ability of H-Gr was evaluated. The results showed that the adsorption kinetics followed the pseudo-second-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 to 287.01 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.