Synthesis and Adsorption Performance of a Hierarchical Micro-Mesoporous Carbon for Toluene Removal under Ambient Conditions

被引：15
作者：
An, Zhaohui [1 ]
Kong, Shulin [1 ]
Zhang, Wenwen [2 ]
Yuan, Ming [1 ]
An, Zhihao [1 ]
Chen, Donghui [1 ,3 ]
机构：
[1] Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China
[2] Donghua Univ, Coll Environm Sci & Engn, Shanghai 201620, Peoples R China
[3] Shanghai DianJi Univ, Inst Foreign Languages, Shanghai 201306, Peoples R China
来源：
MATERIALS | 2020年 / 13卷 / 03期
关键词：
ordered mesoporous carbons; activation; hierarchical pores; dynamic adsorption; toluene; SIDE-CHAIN ALKYLATION; METAL-ORGANIC FRAMEWORKS; KOH ACTIVATION; POROUS CARBON; DYNAMIC ADSORPTION; GASEOUS TOLUENE; VOC ADSORPTION; CO2; TEMPERATURE; NANOSHEETS;
D O I：
10.3390/ma13030716
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ordered mesoporous carbons (OMCs) were synthesized in this study through a soft template method and then activated by employing different mass ratios of KOH/OMCs to obtain KOH-activated ordered mesoporous carbons (KOMCs) with hierarchical pore structures. To verify the adsorption capacity, the KOMCs have been subjected to toluene emission-reduction experiments. The KOMCs were characterized by TEM, XRD, N-2 adsorption-desorption isotherms, and Raman spectroscopy. The pore structure of OMCs was found to be effectively optimized by the activation with KOH, with the BET-area and total pore volume values reaching as high as 2661 m(2) g(-1) and 2.14 cm(3) g(-1) respectively. Then, the dynamic adsorption capacity of toluene on KOMCs was investigated via breakthrough curves, which can be well described by the Yoon and Nelson (Y-N) model. The dynamic adsorption capacities of toluene exhibit the following order: OMC < KOMC-1 < KOMC-5 < KOMC-3. The sample activated by KOH/OMC with a mass ratio of 3:1 (KOMC-3) demonstrated the highest toluene adsorption capacity of 355.67 mg g(-1), three times higher in comparison with the untreated carbon (104.61 mg g(-1)). The modified hierarchical porous carbons also exhibited good recyclability. The KOMCs with rich pore structure, high toluene adsorption capacity, and superior reusability thus display a huge potential for volatile organic compound (VOC) elimination.
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页数：13
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