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UiO-66-NH₂/氧化石墨烯复合材料：合成、表征及二氧化碳吸附性能

UiO-66-NH₂/GO Composite: Synthesis, Characterization and CO₂ Adsorption Performance.

作者信息

Cao Yan, Zhang Hongmei, Song Fujiao, Huang Tao, Ji Jiayu, Zhong Qin, Chu Wei, Xu Qi

机构信息

School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224000, China.

School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

出版信息

Materials (Basel). 2018 Apr 11;11(4):589. doi: 10.3390/ma11040589.

DOI:10.3390/ma11040589
PMID:29641476
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5951473/
Abstract

In this work, a new composite materials of graphene oxide (GO)-incorporated metal-organic framework (MOF)(UiO-66-NH₂/GO) were in-situ synthesized, and were found to exhibit enhanced high performances for CO₂ capture. X-ray diffraction (XRD), scanning electron microscope (SEM), N₂ physical adsorption, and thermogravimetric analysis (TGA) were applied to investigate the crystalline structure, pore structure, thermal stability, and the exterior morphology of the composite. We aimed to investigate the influence of the introduction of GO on the stability of the crystal skeleton and pore structure. Water, acid, and alkali resistances were tested for physical and chemical properties of the new composites. CO₂ adsorption isotherms of UiO-66, UiO-66-NH₂, UiO-66/GO, and UiO-66-NH₂/GO were measured at 273 K, 298 K, and 318 K. The composite UiO-66-NH₂/GO exhibited better optimized CO₂ uptake of 6.41 mmol/g at 273 K, which was 5.1% higher than that of UiO-66/GO (6.10 mmol/g). CO₂ adsorption heat and CO₂/N₂ selectivity were then calculated to further evaluate the CO₂ adsorption performance. The results indicated that UiO-66-NH₂/GO composites have a potential application in CO₂ capture technologies to alleviate the increase in temperature of the earth's atmosphere.

摘要

在这项工作中，原位合成了一种新型的氧化石墨烯（GO）掺杂金属有机框架（MOF）（UiO-66-NH₂/GO）复合材料，发现其在二氧化碳捕集方面表现出增强的高性能。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、N₂物理吸附和热重分析（TGA）来研究该复合材料的晶体结构、孔结构、热稳定性和外部形态。我们旨在研究引入GO对晶体骨架和孔结构稳定性的影响。对新型复合材料的物理和化学性质测试了其耐水、耐酸和耐碱性。在273K、298K和318K下测量了UiO-66、UiO-66-NH₂、UiO-66/GO和UiO-66-NH₂/GO的CO₂吸附等温线。复合材料UiO-66-NH₂/GO在273K时表现出更好的优化CO₂吸收量，为6.41 mmol/g，比UiO-66/GO（6.10 mmol/g）高5.1%。然后计算了CO₂吸附热和CO₂/N₂选择性，以进一步评估CO₂吸附性能。结果表明，UiO-66-NH₂/GO复合材料在CO₂捕集技术中具有潜在应用，可缓解地球大气温度的升高。

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