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In this work, a nitrogen-doped activated mesoporous carbon aerogel (NAMC) for the removal of methyl orange from aqueous solution was prepared through carbonization and pickling using the chitosan and poly(vinyl alcohol) as the carbon source and AlCl3·6H2O as both the solvent for chitosan and the hard template for porous structure. The morphology and structural properties were characterized by N2 adsorption–desorption...
A type of carboxymethyl cellulose/chitosan composite sponge that is able to indicate pH changes was prepared and characterized. This sponge, dyed with the natural dye cyanine, showed a rather rapid response by changing from blue to green as the solution pH changed from 4 to 8. This visible color change indicated that the sponge could be a pH sensor with high sensitivity. The carboxymethyl cellulose/chitosan...
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