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Natural Honeycomb-like structure cork carbon with hierarchical Micro-Mesopores and N-containing functional groups for VOCs adsorption

发布时间：2024-09-30

点击次数：

DOI码：10.1016/j.apsusc.2021.150550

所属单位：中南大学

发表刊物：Applied Surface Science

关键字：Adsorption; Cork; DFT; GCMC; Porous carbon; VOCs

摘要：It can be said that most of the garbage were misplaced resources. And how to turn these resources into valuable products is extremely important. In this study, the cork wine stoppers were recovered and prepared into VOCs adsorption materials through ammonia activation. The prepared cork biomass carbon had abundant micropores and mesopores and rich N-containing functional groups, especially amino groups (3.6%). The obtained sample NC900 exhibited a good performance for the adsorption of acetone (1221 mg g−1 at 18 kPa), benzene (840 mg g−1 at 10 kPa) and toluene (720 mg g−1 at 3 kPa) at 25 °C. The adsorption effect of hierarchical porous carbon on VOCs under different pressures were calculated and analyzed through GCMC. Multilayer adsorption promoted the adsorption of VOCs molecules in mesopores under the high pressure. The promotion effects of nitrogen-containing functional groups (amino, pyrrolic, pyridine) based on adsorption energy calculations were evaluated via DFT. The amino functional groups obtained the strongest affinity for acetone (-0.64 eV), benzene (-0.66 eV) and toluene (-0.72 eV). This study achieved a guiding significance for the preparation of cork biomass carbon and its application in the VOCs adsorption.

论文类型：期刊论文

论文编号：150550

卷号：565

ISSN号：01694332

是否译文：否

发表时间：2021-11-01

收录刊物：SCI

发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0169433221016202?via%3Dihub