Construction of horizontal stratum landform-like composite foams and their methyl orange adsorption capacity

Published on Mar 1, 2017in Applied Surface Science6.182
· DOI :10.1016/J.APSUSC.2016.10.211
Jiajia Chen11
Estimated H-index: 11
(WHU: Wuhan University),
Xiaowen Shi40
Estimated H-index: 40
(WHU: Wuhan University)
+ 3 AuthorsHongbing Deng40
Estimated H-index: 40
(WHU: Wuhan University)
Abstract Chitosan (CS)/rectorite (REC)/carbon nanotubes (CNTs) composite foams with good mechanical properties were successfully fabricated by unidirectional freeze-casting technique. The morphology of the foam showed the well-ordered porous three-dimensional layers and horizontal stratum landform-like structure. The holes on the layers looked like the wings of butterfly. Additionally, the X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy results indicated the successful addition of CNTs and REC. The intercalated REC with CS chains was confirmed by small-angle X-ray diffraction. The surface structure of the foams was also analyzed by Raman spectroscopy. The adsorption experiments showed that when the mass ratio of CS to REC was 10:1 and CNTs content was 20%, the composite foam performed best in adsorbing low concentration methyl orange, and the largest adsorption capacity was 41.65 mg/g.
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