The use of ZnCl<sub>2</sub> activation to prepare low-cost porous carbons coated on glass fibers using mixtures of Novolac, polyethylene glycol and furfural as carbon precursors

WEI Xiao-qun; LI Qi-han; LI Hai-chao; LI Hui-jun; CHEN Shui-xia

doi:10.1016/S1872-5805(15)60206-2

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Article Navigation > New Carbon Mater. > 2015 > 30(6): 579-586

WEI Xiao-qun, LI Qi-han, LI Hai-chao, LI Hui-jun, CHEN Shui-xia. The use of ZnCl2 activation to prepare low-cost porous carbons coated on glass fibers using mixtures of Novolac, polyethylene glycol and furfural as carbon precursors. New Carbon Mater., 2015, 30(6): 579-586. doi: 10.1016/S1872-5805(15)60206-2

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WEI Xiao-qun, LI Qi-han, LI Hai-chao, LI Hui-jun, CHEN Shui-xia. The use of ZnCl₂ activation to prepare low-cost porous carbons coated on glass fibers using mixtures of Novolac, polyethylene glycol and furfural as carbon precursors. New Carbon Mater., 2015, 30(6): 579-586. doi: 10.1016/S1872-5805(15)60206-2

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The use of ZnCl₂ activation to prepare low-cost porous carbons coated on glass fibers using mixtures of Novolac, polyethylene glycol and furfural as carbon precursors

doi: 10.1016/S1872-5805(15)60206-2

1.
PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
2.
Materials Science Institute, Sun Yat-Sen University, Guangzhou 510275, China;
3.
Inspection and Quarantine Technology Center of Guangdong Entry-Exit Inspection and Quarantine Bureau, Guangzhou 510623, China

Funds: Science and Technology Project of Guangdong Province (2014A030313192).

Accepted Date: 2016-01-05
Publish Date: 2015-12-28

Abstract

Abstract

Using ZnCl₂ as an activation agent,low-cost porous carbonswere prepared using mixtures of Novolac, polyethylene glycol (PEG) and furfural in alcohol as carbon precursorsthat were coated onto glass fiber mats. The morphology, microcrystalline structure, pore structure, surface chemistry, mechanical strength and adsorption properties of the porous carbons were characterized. Results show that the addition of furfural and PEG to the carbon precursors greatly improves pore development. The specific surface area of the porous carbons is as high as 2 023 m²/g when PEG and furfural are added, otherwise it is only 404 m²/g. It is found that the addition of PEG to the precursors can increase the solubility of ZnCl₂ in alcohol, and thus facilitate the activation of the carbon precursors. The formation of a crosslinked structure of furfural with Novolac is responsible for the improvement in the thermal stability of the precursors and the increase in the carbon yield, which favors the increase in the surface area and the reduction of the production cost. The porous carbons have similar adsorption performance and microcrystalline structure to conventional activated carbon fibers.
- Activated carbon,
- Glass fiber,
- ZnCl₂,
- Phenolic-resin

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