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Multi-functionalized carbon aerogels derived from chitosan
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DOI：10.1016/j.jcis.2021.07.132.png)
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Abstract
En 中文
Carbon aerogels are prepared by a thermal treating-freeze drying approach from chitosan, with glycine hydrochloride ionic liquid (IL) acting as solvent and nitrogen source. Different post-treatments such as ball milling and high temperature carbonization are employed to functionalize the obtained carbon aerogels with tuned properties, making it promising candidates as fluorescence material (NACs-Q), electrode mate-rial (FDC-800) and catalyst support (NAC(Pd)-C). NACs-Q is water-soluble quantum dot with average particle sizes of 3.8 nm, presenting excitation-/emission-independent and pH-sensitive properties, which could be used as sensor for testing acetone vapor or an on-off-on sensor for detections of Fe3+ and vitamin C in fruits. FDC-800 exhibits fluffy lamellar structure with developed micro-mesopores and nitrogen-containing groups on their surfaces, which is beneficial for building flexible solid-state supercapacitor with excellent performance, delivering a capacitance of F-208/g at 0.5 A/g, and achieving an energy density of 7.2 W h/kg at a power density of 50 W/kg. Moreover, NAC(Pd)-C can be used as catalyst for phenol hydro-genation, and phenol conversion of 100% with cyclohexanone selectivity of 98.3% is achieved, due to the synergetic effects of the Pd active-site, the N-containing groups, and the Lewis acid sites on the support. (C) 2021 Elsevier Inc. All rights reserved.
Keywords:
Carbon aerogels
Ionic liquid
Carbon dots
Supercapacitors
Catalyst supports
Journal
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9.7
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3.7W
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14.7W