In this study, silver/reduced graphene oxide (Ag/RGO) coated polyester (PET) fabrics with dopamine as adhesive agent were prepared through an efficient chemical reduction method under microwave irradiation.
A novel
CO2-responsive cotton as an eco-friendly adsorbent
derived from poly(4-acryloyloxybenzophenone-co-2-(dimethylamino)
ethyl methacrylate) and cotton was fabricated via a facile and fast
dip-coating method. As expected, upon CO2 stimulation,
the protonated cotton presented CO2-induced “on–off”
selective adsorption behaviors toward anionic dyes owing to electrostatic
interactions. The adsorption isotherms and kinetics of the CO2-responsive cotton toward anionic dyes obeyed the Langmuir
isotherm and pseudo-second-order kinetics models, respectively. It
is noteworthy that the CO2-responsive cotton exhibited
high adsorption capacity and ultrafast adsorption rate toward anionic
dyes with the maximum adsorption capacities of 1785.71 mg g–1 for methyl orange (MO), 1108.65 mg g–1 for methyl
blue (MB), and 1315.79 mg g–1 for naphthol green
B (NGB), following the adsorption equilibrium times of 5 min for MO,
3 min for MB, and 4 min for NGB. Moreover, the CO2-responsive
cotton also exhibited high removal efficiency toward anionic dyes
in synthetic dye effluent. Additionally, the CO2-responsive
cotton could be facilely regenerated via heat treatment under mild
conditions and presented stable adsorption properties even after 15
cycles. Finally, the as-prepared CO2-responsive cotton
exhibited outstanding antibacterial activity against E. coli and S. aureus. In summary, this novel CO2-responsive cotton can be viewed as a promising eco-friendly adsorbent
material for potential scalable application in dye-contaminated wastewater
remediation.
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