石墨烯吸附处理甲苯气体在环境综合大实验中的应用  

Application of Grapheme Adsorbing Toluene in Environmental Comprehensive Experiment

作　　者：刘芳[1] 姜国飞 赵朝成[1] 王永强[1] 孙娟[1] 

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580

出　　处：《实验室研究与探索》2017年第8期5-9,33,共6页Research and Exploration In Laboratory

基　　金：山东省自然科学基金项目(ZR2014EEM011);中国石油大学(华东)教改项目(QN201408)

摘　　要：采用氧化石墨还原法制备出石墨烯并进行了红外光谱、XRD、SEM及N_2吸脱附表征,考察了石墨烯吸附甲苯的性能,采用Langmuir和Freundlich模型对吸附等温线进行了拟合。结果表明,制备的石墨烯呈片层状态,表面多层重叠;石墨烯的N_2吸脱附等温线符合IUPAC分类中的第Ⅳ类型;孔径主要分布在2~6 nm。初始甲苯浓度提高,吸附量变大,吸附的穿透时间和饱和时间变短;床层高度的升高,导致甲苯的穿透时间、饱和时间及吸附量变大;温度越高,达到吸附饱和的时间越快。石墨烯吸附甲苯可用Langmuir和Freundlich模型来描述,但Freundlich模型比用Langmuir模型的相关性更好。The grapheme was prepared using graphite oxide reduction method and characterized by IR,XRD,SEM and N2 adsorption-desorption. The toluene adsorption capacity of grapheme was investigated. In addition,Langmuir and Freundlich models were applied for equilibrium adsorption isotherms fitting. The results show that grapheme has the layer structure. According to International Union of Pure and Applied Chemistry（ IUPAC） classification,grapheme is typical type IV isotherm. The grapheme possesses mesopores with peaks at around 2-6 nm. The performance study of grapheme adsorbing toluene shows that with the increase of toluene concentration,the adsorption capacity increases and the penetration time and saturation time reduce. In addition,the adsorption capacity,penetration time and saturation time all increase with the increase of bed height. The higher temperature results in shorter saturation time. The toluene adsorption by grapheme can be simulated by Langmuir and Freundlich models,while the Freundlich model is more suitable for fitting grapheme adsorbing toluene.

关 键 词：环境综合实验 石墨烯 甲苯 吸附 实践教学 

分 类 号：X511[环境科学与工程—环境工程]