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Development of porous carbon nanofibers from electrospun polyvinylidene fluoride for CO2 capture

机译:电纺聚偏二氟乙烯用于捕获二氧化碳的多孔碳纳米纤维的开发

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Highly porous carbon nanofibers (CNFs) are successfully prepared for CO2 capture from the carbonization of electrospun polyvinylidene fluoride (PVDF). In the CNF preparation, different temperatures in the range 300-1000 degrees C are applied for carbonization, and the effect of temperature is investigated. Well-developed porosities and enhanced CO2 adsorption uptakes are achieved by applying a large degree of carbonization at temperatures of 400 degrees C or above. In the carbonization at high temperatures, narrow micropores (<0.7 nm) are predominantly developed in the PVDF-based CNFs, contributing to an increase of specific surface area and pore volume up to 1065 m(2) g(-1) and 0.61 cm(3) g(-1), respectively. The highest CO2 adsorption uptake of 3.1 mol kg(-1) is measured at 30 degrees C and similar to 1 atm for PVDF-based CNF carbonized at 1000 degrees C. PVDF-based CNFs also display excellent recyclability and rapid adsorption-desorption kinetics, which make PVDF-based CNFs promising adsorbents for CO2 capture.
机译:已成功制备出高度多孔的碳纳米纤维(CNF),用于从电纺聚偏二氟乙烯(PVDF)的碳化中捕获CO2。在CNF制备中,将300-1000摄氏度范围内的不同温度用于碳化,并研究了温度的影响。通过在400摄氏度或更高的温度下进行大量的碳化,可以实现充分发展的孔隙度和增强的CO2吸附吸收率。在高温下的碳化中,基于PVDF的CNF主要发展出狭窄的微孔(<0.7 nm),导致比表面积和孔体积的增加达到1065 m(2)g(-1)和0.61 cm (3)分别为g(-1)。在30摄氏度下测得的最高CO2吸附吸收量为3.1 mol kg(-1),对于在1000摄氏度下碳化的基于PVDF的CNF而言,其最大吸收量约为1 atm。基于PVDF的CNF还具有出色的可回收性和快速的吸附-解吸动力学,这使基于PVDF的CNF有望成为用于CO2捕集的吸附剂。

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