Journal
APPLIED SURFACE SCIENCE
Volume 440, Issue -, Pages 873-879Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.01.252
Keywords
Cellulose; TEMPO; Carbon aerogels; Surface structure; Mechanism
Categories
Funding
- National Natural Science Foundation of China [51302317, 51702360]
- Natural Science Foundation of Hunan Province [14JJ3008]
- Sichuan Provincial Research and Development [2017GZ0290]
- Project of Hunan Provincial Innovation Foundation for Postgraduate [CX2016B002]
- Project for Student Science and Technology Innovation of National University of Defense Technology
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Although carbon aerogels derived from naturally occurring materials have been developed extensively, a reasonable synthetic approach using cellulose-resource remains unclear. Here, we report a strategy to prepare carbon aerogels originated from cellulose position-selectively oxidized by TEMPO-oxidized process. Contrary to non-TEMPO-oxidized cellulose-derived carbon aerogels (NCCA) with relative loose structure, TEMPO-oxidized cellulose-derived carbon aerogels (TCCA) with tight fibrillar-continuous network are monitored, suggesting the importance of TEMPO-oxidized modification towards creating the architecture of subsequently produced carbon aerogels. TCCA endows a higher BET area despite owning slightly dense bulk density comparing with that of NCCA. The structural texture of TCCA could be maintained in a way in comparison to TEMPO-oxidized cellulose-derived aerogel, due to the integration and aggregation effect by losing the electric double layer repulsion via ionization of the surface carboxyl groups. FTIR and XPS analyses signify the evidence of non-functionalized carbon-skeleton network formation in terms of TCCA. Further, the mechanism concerning the creation of carbon aerogels is also established. These findings not only provide new insights into the production of carbon aerogels but also open up a new opportunity in the field of functional carbon materials. (C) 2018 Elsevier B.V. All rights reserved.
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