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

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。

Rapid Synthesis of Mesoporous Silica Graphene Aerogel Composite and the Application in Benzene Removal

A rapid hydrothermal method was proposed to synthesize ultralight mesoporous silica graphene aerogel (MSGA)composite. The texture of MSGA exhibited high uniformity, and the mesopore structure was well preserved after hydrothermal reaction and lyophilization. The specific surface area reached 395.5 m_²/g when the maximum MS content was 88.2%. The adsorption capacity of benzene vapor at room temperature and normal pressure was 10.77 mL/g, and the adsorption penetration time is 34.4 times that of graphene aerogel. The MSGA composite achieved higher benzene removal performance of 11.07 mL/g under ambient humidity. More importantly, the MSGA composites exhibited great potential in applications with high gas fluidity of 500 mL/min.