NDLI: Chitosan–silica composite aerogels: preparation, characterization and Congo red adsorption

Content Provider	Springer Nature Link
Author	Wang, Jianquan Zhou, Qiushi Song, Danqiao Qi, Bin Zhang, Yanjiang Shao, Yizhen Shao, Ziqiang
Copyright Year	2015
Abstract	A series of aerogels composed of chitosan and/or silica were fabricated by tuning their feeding ratios. They were characterized by FTIR, thermogravimetric analysis, and X-ray diffraction; pore structures were analyzed by Brunauer–Emmett–Teller (BET) nitrogen sorption and scanning electron microscopy (SEM); adsorption capacities to Congo red were explored as well. The incorporation of silica enhances the thermostabilization of chitosan in gels. And as silica content increases, bulk densities of aerogels decrease gradually, while porosities, pore volumes, and surface areas obtained via BET method increase consequently; as well, porous structure becomes more regular and pore size tends to be smaller that was observed by SEM. The adsorption capacities of chitosan-containing aerogels to Congo red reach as high as about 150 mg/g, much higher than that of pure silica (17 mg/g), demonstrating their potential as a class of novel adsorbent materials. A series of chitosan- and/or silica-based aerogels were fabricated, which were named as C5S0, C4S1, C1S1, C1S4, and C0S5, with different designed CS/SiO$_{2}$ mass ratios of 100/0, 80/20, 50/50, 20/80, and 0/100, respectively. Their compositions and structures as well as adsorption properties to Congo red were analyzed and compared in detail.
Starting Page	501
Ending Page	509
Page Count	9
File Format	PDF
ISSN	09280707
Journal	Journal of Sol-Gel Science and Technology
Volume Number	76
Issue Number	3
e-ISSN	15734846
Language	English
Publisher	Springer US
Publisher Date	2015-07-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aerogel Composites Chitosan Silica Adsorption Congo red Ceramics, Glass, Composites, Natural Methods Inorganic Chemistry Optical and Electronic Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Chemistry Materials Chemistry Biomaterials Condensed Matter Physics Electronic, Optical and Magnetic Materials

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