有序介孔硅材料的微量碳层修饰及VOCs吸附性能

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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

Received: 22 March 2024

PACS:

X701

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	Articles by authors
	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

Cite this article:

KE Quan-li,XIONG Ye-dong,LU Mei等. Carbon layer modification on the surface of ordered mesoporous silica-based materials and its VOCs adsorption[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5388-5396.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I10/5388

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