有序介孔硅材料的微量碳层修饰及VOCs吸附性能  

Carbon layer modification on the surface of ordered mesoporous silica-based materials and its VOCs adsorption

作　　者：柯权力 熊烨栋 卢梅 吴天浩 黄康康 闵炯 金传敏 崔国凯 赵博 卢晗锋[1] KE Quan-li;XIONG Ye-dong;LU Mei;WU Tian-hao;HUANG Kang-kang;MIN Jiong;JIN Chuan-min;CUI Guo-kai;ZHAO Bo;LU Han-feng(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310000,China;Zhejiang Environmental Technology Co.,Ltd.,Hangzhou 310000,China;Zhejiang Yuesheng Environmental Technology Company Limited,Huzhou 313300,China;Zhejiang TUNA Environmental Science&Technology Co.,Ltd.,Shaoxing 312000,China)

机构地区：[1]浙江工业大学化学工程学院,浙江杭州310000 [2]浙江省环境科技有限公司,浙江杭州310000 [3]浙江悦胜环境科技有限公司,浙江湖州313300 [4]浙江德创环保科技股份有限公司,浙江绍兴312000

出　　处：《中国环境科学》2024年第10期5388-5396,共9页China Environmental Science

基　　金：浙江省“尖兵”“领雁”研发攻关计划(2023C03127,2024C03114);国家自然科学基金资助项目(22208300);浙江省自然科学基金资助项目(LQ23B060007);浙江省属高校基本科研业务费专项资金资助(RF-A2023004);浙江省博士后科研择优资助项目(ZJ2023145)。

摘　　要：以孔道规整的介孔分子筛SBA-15和MCM-41作为硅基材料前驱体,以蔗糖作为生物质碳源,通过化学刻蚀方法将生物质碳引入两种介孔分子筛孔道中,从而制备获得碳-介孔分子筛复合材料.通过对蔗糖浓度条件的优化,可以获得比表面积、碳含量和甲苯吸附性能最佳的碳-介孔分子筛复合材料.经由TEM-EDS图谱可以证明,碳元素均匀存在于上述两种介孔硅材料的孔道.进一步通过孔径分析,发现碳层修饰后的介孔分子筛(C@MCM和C@SBA)中微孔比例显著提升,因而其甲苯吸附容量明显高于其对应的介孔分子筛(MCM-41和SBA-15).其中,C@SBA在5次吸脱附循环中容量基本保持不变,循环吸附性能相比C@MCM更为优越.此外,碳层修饰后的介孔分子筛具有良好的耐水性,其吸附容量不会随相对湿度的提高而大幅降低.最后,上述复合材料对其他含氧VOCs物种也具有较好的吸附性能,但对甲苯等弱极性分子的吸附效果更显著.Carbon-mesoporous molecular sieve composite materials were synthesized by introducing sucrose into the channels of mesoporous molecular sieves(SBA-15 and MCM-41)followed by chemical etching at high temperatures.By optimizing the sucrose concentration,a balance between surface area,carbon content,and toluene adsorption capacity was achieved.TEM-EDS characterization confirmed that the carbon generated through chemical activation was uniformly distributed within the channels of the mesoporous molecular sieves.Additionally,pore size distribution analysis revealed a significant increase in micropore fractions in both mesoporous materials after functionalization,leading to enhanced toluene adsorption capacity.Notably,compared to C@MCM,C@SBA maintained relatively higher toluene adsorption capacity even after five adsorption-desorption cycles,which translates to a better regenerability.Alongside their excellent adsorption performance,the carbon-mesoporous molecular sieve composites also exhibited remarkable moisture resistance,with no significant decrease in performance under increased humidity.Lastly,both composite materials demonstrated good adsorption performance for other oxygen-containing VOC species,although adsorption was more favorable for nonpolar adsorbates,such as toluene.

关 键 词：介孔分子筛 孔道修饰 碳硅复合材料 VOCs吸附 

分 类 号：X701[环境科学与工程—环境工程]