中南大学
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返回首页Solvent-free one-step simple synthesis of N, O-doped microporous carbon using K2CO3 as an activation agent and their application to CO2 capture: Synergistic effect of pore structure and nitrogen–oxygen functional groups
发布时间：2025-06-14
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- DOI码：
- 10.1016/j.ces.2025.121615
- 发表刊物：
- Chemical Engineering Science
- 关键字：
- CO2 adsorption; GCMC&DFT; N, O-doped microporous carbon materials; Nitrogen-oxygen functional groups; One-step synthesis; Sugarcane bagasse
- 摘要：
- Preparing N, O-doped microporous carbons requires a multi-step process, which is expensive and time-consuming. The preparation methods presented in this work are easy, solvent-free, and more sustainable, using sugarcane bagasse as a carbon precursor, melamine as a nitrogen source, potassium carbonate as an activator, and carbonization at a low temperature. The prepared carbons (BMK-1) showed the highest CO2 adsorption performance (3.24 mmol/g at 25°C and 4.90 mmol/g at 0°C, 1 bar). An in-depth study was performed to analyze the influence of narrow micropores with different pore ranges and nitrogen–oxygen atoms doping on CO2 adsorption performance. GCMC simulations and weak interaction analyses showed that a pore size of approximately 0.7 nm is suitable for CO2 adsorption. The existence of nitrogen–oxygen groups enhanced the Van der Waal interaction between samples and CO2 molecules. It showed that the pore structure and nitrogen–oxygen group are synergistic factors contributing to CO2 adsorption properties.
- 论文类型：
- 期刊论文
- 论文编号：
- 121615
- 卷号：
- 311
- 是否译文：
- 否
- 发表时间：
- 2025-06-01
- 收录刊物：
- SCI