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素调节的MOF@lignocellulose气凝用于增强选择性二氧化碳吸附

Jiaqing Zhang¹, Bin Wu², Shaoning Wang¹

¹Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.

Carbohydrate polymers

|July 30, 2025

概括

这项研究增强了金属有机框架 (MOFs),使用纤维素气凝来改善二氧化碳捕获. 经过修改的MOF显示,二氧化碳吸附能力增加了102.83%,稳定性更好.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

金属有机框架 (MOF) 由于其多孔结构,具有出色的气体吸附性能.
然而,MOF的机械稳定性较差,在回收过程中存在挑战,这限制了它们的实际应用.
纤维素复合气凝为提高MOF性能提供了一个有前途的基材.

研究的目的:

通过将它们与基纤维素复合物气凝集成来改善MOF的机械性能和回收.
通过添加素来控制形态,固化和尺寸,优化MOFs在气凝基板上的现场生长.
评估开发的基于MOF的气凝对选择性二氧化碳 (CO2) 吸附的性能.

主要方法:

制造MOF-@CNFs/DESL气凝,其中含有不同数量的深度欧性溶剂提取的红素 (DESL).
气凝的特定表面积和多孔性的特征.
对二氧化碳选择性吸附能力和对甲 (CH4) 的选择性进行评估.
评估材料在多个吸附-脱附周期中的稳定性.

主要成果:

在MOF@CNFs/DESL气凝中加入30重%的DESL显著增加了特定表面积,达到379.43 m2/g.
与未经修改的MOF相比,CO2吸附能力提高了102.83%.
通过CH4对CO2的高选择性吸附系数达到7.5.
气凝在六个循环后保持了70%的初始二氧化碳吸附能力,这表明稳定性得到了改善.

结论:

纤维素复合气凝有效地提高了气体吸附应用的MOF的性能.
开发的MOF@CNFs/DESL气凝表现出卓越的二氧化碳捕获能力和选择性.
这些复合材料的增强机械性能和稳定性为实际的二氧化碳捕获技术铺平了道路.

关键词:

碳二氧化碳 (CO2) 吸附方式在Lignin的基础上.红纤维素气凝是纤维素的气凝.金属有机框架的框架.

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