有序介孔硅材料的微量碳层修饰及VOCs吸附性能

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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.

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	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

关键词 ：介孔分子筛, 孔道修饰, 碳硅复合材料, VOCs吸附

Abstract：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.

Key words： mesoporous molecular sieves pore modification carbon-silica composites VOCs adsorption

收稿日期: 2024-03-22

PACS:

X701

基金资助: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)

通讯作者: 赵博,教授级高级工程师,patrickzhao17@zj-tuna.com;卢晗锋,教授,luhf@zjut.edu.cn E-mail: patrickzhao17@zj-tuna.com;luhf@zjut.edu.cn

作者简介: 柯权力(1990-),男,浙江桐庐人,讲师,博士,主要从事功能化分子筛合成和吸附应用研究.发表论文20余篇.quanlike@zjut.edu.cn.

引用本文:

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. 有序介孔硅材料的微量碳层修饰及VOCs吸附性能[J]. 中国环境科学, 2024, 44(10): 5388-5396. 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. Carbon layer modification on the surface of ordered mesoporous silica-based materials and its VOCs adsorption. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5388-5396.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I10/5388

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