Abstract

Cuprous oxide nanoparticles-composed microspheres (Cu2O SPs) with rough surfaces and porous structures were prepared by a one-step reduction method at room temperature. The Cu2O SPs were characterized by SEM, XRD, EDS and XPS techniques, respectively. The adsorption removal of amaranth dye from aqueous solution by the as-prepared Cu2O SPs was studied. Kinetics and isotherms studies suggested that the adsorption process followed pseudo-second-order and Freundlich models. Dubinin–Radushkevich (D–R) model indicated that the adsorption was a physical process. The maximum adsorption capacity at 20 °C was estimated to be 7627 mg g−1, which was the highest reported value so far for amaranth adsorption. The thermodynamic parameters (free energy change, ΔG°; enthalpy change, ΔH° and entropy change, ΔS°) for the adsorption have been estimated. The results showed that the adsorption of amaranth onto Cu2O SPs could be considered as a spontaneous, exothermic and mainly physical adsorption process.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.