Facile synthesis of graphene-based hyper-crosslinked porous carbon composite with superior adsorption capability for chlorophenols  

作　　者：Yanyang Liu Bin Men Aibin Hu Qingliang You Guiying Liao Dongsheng Wang 

机构地区：[1]Engineering Research Center of Nano-Geomaterials of Ministry of Education,Faculty of Material Science and Chemistry,China University of Geosciences,Wuhan 430074,China [2]State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [3]Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,China

出　　处：《Journal of Environmental Sciences》2020年第4期395-407,共13页环境科学学报（英文版）

基　　金：financially supported by the Major Science and Technology Program for Water Pollution Control and Treatment of China(No.2018ZX07110004);the National Natural Science Foundation of China(Nos.21677156 and 21477118)

摘　　要：In this work,we proposed a green and cost-effective method to prepare a graphene-based hyper-cross-linked porous carbon composite(GN/HCPC)by one-pot carbonization of hyper-cross-linked polymer(HCP)and glucose.The composite combined the advantages of graphene(GN)and hyper-cross-linked porous carbon(HCPC),leading to high specific surface area(396.93 m^2/g)and large total pore volume(0.413 cm^3/g).The resulting GN/HCPC composite was applied as an adsorbent to remove 2,4-dichlorophenol(2,4-DCP)from aqueous solutions.The influence of different solution conditions including pH,ionic strength,contact time,system temperature and concentration of humic acid was determined.The maximum adsorption capacity of GN/HCPC composite(calculated by the Langmuir model)could reach 348.43 mg/g,which represented increases of 43.6%and 13.6%over those of the as-prepared pure GN and HCPC,respectively.The Langmuir model and pseudo-second-order kinetic model were found to fit well with the adsorption process.Thermodynamic experiments suggested that the adsorption proceeded spontaneously and endothermically.In addition,the GN/HCPC composite showed high adsorption performance toward other organic contaminants including tetracycline,bisphenol A and phenol.Measurement of the adsorption capability of GN/HCPC in secondary effluent revealed a slight decrease over that in pure water solution.This study demonstrated that the GN/HCPC composite can be utilized as a practical and efficient adsorbent for the removal of organic contaminants in wastewater.

关 键 词：GRAPHENE Hyper-cross-linked polymer Adsorption 2 4-DICHLOROPHENOL 

分 类 号：X703[环境科学与工程—环境工程]