Abstract
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 m2/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.
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This work was supported by the National Key R&D Program of China (2018YFC1803100). The authors are grateful for Natural Science Foundation of Jiangsu Province (BK20181142).
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Song, M., Yu, L., Song, B. et al. Alkali promoted the adsorption of toluene by adjusting the surface properties of lignin-derived carbon fibers. Environ Sci Pollut Res 26, 22284–22294 (2019). https://doi.org/10.1007/s11356-019-05456-9
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DOI: https://doi.org/10.1007/s11356-019-05456-9