Ministry of Education of Key Laboratory of Energy Thermal Conversion and Control, School of Energy and Environment, Southeast University, Nanjing, 210096, China.
Environ Sci Pollut Res Int. 2019 Aug;26(22):22284-22294. doi: 10.1007/s11356-019-05456-9. Epub 2019 May 31.
The lignin-based carbon fibers were prepared by electrospinning followed by stabilization, carbonization, and activation (i.e., steam activation, one-step KOH activation, and metal activation). The effect of carbonization temperature on prepared carbon fibers (CFs) was investigated. As a result, 800 °C is the most suitable carbonization temperature because the prepared carbon fibers possess greater specific surface area and pore volume. With the help of various characterization methods, the structural characteristics of the activated carbon fibers (ACFs) prepared by the three activation methods and the adsorption performance of toluene were compared. It was observed that the activated carbon fibers prepared by KOH one-step activation method (ACFK) exhibited higher specific surface area (1147.16 m/g) and greater toluene adsorption (463 mg/g). Particularly, abundant microporous structures and surface functional groups play a vital role in the adsorption process. Further, the adsorption performance of toluene onto ACFK was further investigated in a gas-phase dynamic adsorption system and the results showed that ACFK has great potential application in adsorption of volatile organic compounds.
基于木质素的碳纤维是通过静电纺丝、稳定化、碳化和活化（即蒸汽活化、一步 KOH 活化和金属活化）制备的。研究了碳化温度对制备的碳纤维（CFs）的影响。结果表明，800°C 是最适合的碳化温度，因为制备的碳纤维具有更大的比表面积和孔体积。通过各种表征方法，比较了三种活化方法制备的活性炭纤维（ACFs）的结构特征和对甲苯的吸附性能。结果表明，KOH 一步活化法（ACFK）制备的活性炭纤维具有更高的比表面积（1147.16 m/g）和更大的甲苯吸附量（463 mg/g）。特别是，丰富的微孔结构和表面官能团在吸附过程中起着至关重要的作用。此外，在气相动态吸附系统中进一步研究了甲苯在 ACFK 上的吸附性能，结果表明 ACFK 在挥发性有机化合物吸附方面具有很大的潜在应用价值。
