In
this work, a new nanocomposite based on octa-amino polyhedral
oligomeric silsesquioxanes (POSS), carbon nanotubes (CNTs), and chitosan
(CS) was synthesized and used for wastewater treatment. The properties
and morphologies of the prepared composite were analyzed by X-ray
diffraction, scanning electron microscopy, transmission electron microscope,
thermogravimetric, and atomic force microscopy. The results showed
that POSS, CNTs, and CS formed a stable composite through intermolecular
forces, and the modification of CS by POSS and CNTs improved its stability.
In addition, the obtained composite showed good adsorption performance
for the degradation of methyl orange and Congo red dyes. The pseudo-first-order
model and pseudo-second-order model were used to analyze the adsorption
data, and the results showed that the adsorption process conforms
to the kinetic model. Moreover, the maximum adsorption capacity of
the composite to methyl orange and Congo red reached 63.23 and 314.97
mg/g, respectively. This work provides new ideas for the preparation
of self-assembled multi-composite and their potential applications
in wastewater treatment.
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