三种氧化石墨烯-单宁凝胶制备及其吸附Pb(Ⅱ)性能  

Preparation and adsorption of Pb(Ⅱ)of three graphene oxide-Tannin gels

作　　者：张雪 何雨秋 武海棠[1] 黄晓华[1] 张强[1] ZHANG Xue;HE Yu-qiu;WU Hai-tang;HUANG Xiao-hua;ZHANG Qiang(College of Forestry,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《应用化工》2021年第3期588-593,共6页Applied Chemical Industry

基　　金：国家重点研发计划课题(2016YFD0600806);陕西省重点研发课题(2020NY-104)。

摘　　要：以石墨为原料,通过Hummers法制备了三种氧化石墨烯,采用原子力显微镜、红外光谱、热重分析仪进行结构表征。将氧化石墨烯与元宝枫壳单宁通过水热反应制备出六种复合气凝胶,研究了这六种气凝胶对水中Pb^(2+)的吸附能力。结果表明,不同方法制备的氧化石墨烯的厚度、热稳定性和官能团含量均有差别。制备的气凝胶对Pb^(2+)均有一定吸附效果,吸附容量最大可达379 mg/g,吸附性能良好。复合气凝胶具有较高的孔隙度和互联结构,并保留了一定量的含氧官能团,有利于对Pb^(2+)的吸附。Using graphite as raw material,three kinds of graphene oxides were prepared by the Hummers method,and the structure was characterized by atomic force microscope,infrared spectroscopy,and thermogravimetric analyzer.Six kinds of composite aerogels were prepared by graphene oxide and Acer truncatum Bunge shell Tannin through hydrothermal reaction,and the adsorption of Pb^(2+)in water solution by these six kinds of aerogels was studied.The results show that the thickness,thermal stability and functional group content of graphene oxide prepared by different methods are different.The prepared aerogel has a certain adsorption effect on Pb^(2+),the maximum adsorption capacity can reach to 379 mg/g,and the adsorption performance is good.The results of infrared analysis and scanning electron microscopy also show that the prepared aerogel has high porosity and interconnected structure,and retains a certain amount of oxygen-containing functional groups,which is conducive to the adsorption of Pb^(2+).

关 键 词：氧化石墨烯 单宁 元宝枫 吸附 水热反应 

分 类 号：TQ031[化学工程] TQ041