氧化硅-石墨烯气凝胶介孔复合材料的合成及其对苯的吸附性能  

Synthesis of Mesoporous Silica Graphene Aerogel Composite and Its Adsorption Performance for Benzene

作　　者：李琳 辛智慧 秦君[3] 冯锋 Li Lin;Xin Zhihui;Qin Jun;Feng Feng(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan,030024;School of Chemistry and Materials Science,Shanxi Normal University,Linfen,041004;College of Chemistry and Chemical Engineering,Shanxi Datong University,Datong,037009)

机构地区：[1]太原理工大学化学化工学院,太原030024 [2]山西师范大学化学与材料科学学院,临汾041004 [3]山西大同大学化学化工学院,大同037009

出　　处：《化学通报》2021年第10期1054-1059,共6页Chemistry

基　　金：山西省应用基础研究计划(201801D221056);山西省研究生教育改革研究项目(2020YJJG296)资助。

摘　　要：采用水热法快速合成了一种新型介孔氧化硅-石墨烯气凝胶复合吸附材料(MSGA)。通过X射线衍射、扫描电镜等方法对MSGA进行表征。结果表明,经过水热反应和冻干处理后的MSGA材料的介孔结构保持完好,介孔氧化硅在MSGA中的分散具有高度均一性。当介孔氧化硅的含量达到88.2(wt)%时,MSGA的比表面积可达395.5m^(2)/g。MSGA材料对苯蒸汽的常温常压吸附量为10.77mL/g,是石墨烯气凝胶的13倍,吸附穿透时间达到石墨烯气凝胶的34.4倍。在0.8%的环境湿度下,由于材料表面羟基的亲和性,进一步提升了对苯的吸附。得益于超低密度和丰富的内部孔隙结构,MSGA能够适应高达500mL/min的气流量。上述结果表明,该复合材料在VOCs消除领域具有广阔的应用前景。A novel mesoporous silica-graphene aerogel composite material(MSGA) was synthesized by a rapid hydrothermal method, and characterized by XRD and SEM methods. Results showed that the mesoporous structure of MSGA remains intact after hydrothermal reaction and lyophilization, and the dispersion of mesoporous silica in MSGA is highly uniform. When the content of mesoporous silica reaches 88.2(wt)%, the specific surface area of MSGA is 395.5 m^(2)/g;the adsorption capacity for benzene vapor at room temperature and pressure is 10.77 mL/g, which is 13 times that of graphene aerogel, and the adsorption penetration time is 34.4 times that of graphene aerogel. At the ambient humidity of 0.8%, the adsorption of benzene is further improved due to the affinity of hydroxyl groups on the surface of the material. Owing to its ultra-low density and abundant internal pore structure, MSGA can easily be adapted to gas flows of up to 500 mL/min. The above results indicated that the composite material has a broad application prospect in the field of VOCs elimination.

关 键 词：复合材料 石墨烯气凝胶 介孔氧化硅 VOCs吸附 

分 类 号：X701[环境科学与工程—环境工程] TQ424[化学工程] TB332[一般工业技术—材料科学与工程]