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Abstract
Viscose‐based activated carbon fibers (VACFs) were treated by a direct‐current (DC) discharge plasma at different conditions. The surface functional groups of VACFs were modified to improve the adsorption and catalysis capacity for SO2 and NOx. The surface properties of the untreated and treated VACFs which were modified in different feed gases (air, O2, N2 and NH3) were performed by scanning electron microscopy, BET, X‐ray photoelectron spectroscopy (XPS) and Fourier transform infrared attenuated total reflection spectroscopy (FTIR‐ATR). The results show that after being treated with plasma, more particles appeared on the external surface of the VACFs and the surface became rougher, the average pore size decreased but the pore volume and the surface area decreased first and then increased. XPS revealed that DC discharge plasma can remarkably change the distribution of functional groups on the surface of VACFs. FTIR‐ATR also indicated that more nitrogen atoms were introduced to the VACFs surface when the feed gas contained nitrogen atoms and N and O atoms were introduced to the surface of VACFs at the same time when the feed gas was air, but it did not happen in the feed gas of N2, or O2, or NH3. Discharge voltage and treatment time were important factors and for our experiment in the feed gas of nitrogen, the optimum modification conditions were 8 kV and 5 min, respectively. Copyright © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.
| Authors: | Zhou, Jia‐Yong; Wang, Zu‐Wu; Zuo, Rong; Zhou, Ye; Cao, Xiao‐Man; Cheng, Kang | |
| Journal: | Asia-Pacific Journal of Chemical Engineering | |
| Volume: | 7 | |
| Year: | 2012 | |
| Pages: | S245 | |
| DOI: | 10.1002/apj.570 | |
| Publication date: | 01-07-2012 |
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