Macroporous Activated Carbon Fibers from Rayon Precursors Impregnated with Phosphoric Acid |
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| Authors: | Qi‐Lin Wu Zhi‐Hai Zhang Shu‐Ying Gu Jing‐Hua Gong |
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| Institution: | 1. State Key Lab. for Modification of Synthetic Fibers and Polymer Materials , Donghua University , Shanghai, P. R. China wql@mail.dhu.edu.cn;3. College of Material Science and Engineering , Donghua University , Shanghai, P. R. China;4. Institute of Nano‐ and Bio‐Polymeric Materials, School of Materials Science and Engineering , Tongji University , Shanghai, P. R. China;5. State Key Lab. for Modification of Synthetic Fibers and Polymer Materials , Donghua University , Shanghai, P. R. China |
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| Abstract: | Novel activated carbon fibers (ACFs) from rayon precursors impregnated with phosphoric acid (H3PO4), containing abundant macropores (pore size>50 nm), were successfully obtained. The physical properties of these ACFs were examined. The BET surface was obtained; SEM observations showed that the concentration of H3PO4 impregnation strongly influenced the surface morphology and the porous texture of the resulting ACFs. The shape of the pores was nearly round and we could estimate the pore size was distributed between 20 and 150 nm. Infrared spectroscopy (IR) was applied to investigate the pyrolysis process of the rayon precursors with H3PO4. In addition, P‐containing substances, which should perhaps be acid phosphates or polyphosphates, can be observed on the surface of the resulting ACFs from SEM photos. Impregnation made the dehydration become more predominant during the pyrolysis process. |
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| Keywords: | activated carbon fibers macropores BET surface area SEM IR TGA |
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