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可持续的气体储存:CO2激活边缘功能化的石墨纳米板块

Seok-Jin Kim^1,2, Min Hui Kim³, Se Jung Lee³

¹Advanced Membranes & Porous Materials Center (AMPMC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia.

|April 5, 2024

概括

研究人员使用CO2激活开发了多孔石墨纳米板块 (GnPs),显著增加了表面积. 这种绿色化学方法为先进材料生产的传统方法提供了可持续的替代方案.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
绿色化学绿色化学

背景情况:

边缘选择性碳氧化石墨纳米板 (ECGnPs) 提供了更好的分散性,但在基底平面上功能有限.
现有的增强石墨纳米板块性能的方法通常涉及严厉的化学处理.

研究的目的:

开发一种创新方法,以显著增加表面积的多孔石墨纳米板块.
调查使用二氧化碳 (CO2) 作为绿色化学框架中的活性剂的可行性.
为了探索激活石墨纳米板块的孔隙结构演变.

主要方法:

石墨纳米板块被边缘选择性碳化形成ECGnPs.
通过流动的CO2在900°C时激活ECGnPs,通过Boudouard反应诱导蚀刻.
由此产生的多孔结构通过使用CH4,Ar,CO2,H2和N2的气体吸附分析来表征.

主要成果:

在CO2激活后,石墨纳米板的表面积从579 m2/g增加到最多2462 m2/g.
成功地研究了激活石墨纳米板块的孔隙结构.
该过程证明了在石墨纳米板块结构上有效的蚀刻和孔隙生成.

结论:

在900°C的CO2激活有效地产生多孔的石墨纳米板块,其表面积增加.
这种方法提供了一种绿色化学替代方案,利用二氧化碳从制造到激活.
这项研究突出了生产先进多孔碳材料的可持续途径.

关键词:

二氧化碳利用率的使用情况气体吸附吸附方式图形纳米小板, 激活有孔的碳是多孔的碳.

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