Journal of Industrial and Engineering Chemistry, Vol.75, 52-60, July, 2019
Adsorption of Cu(II) to mGO@Urea and its application for the catalytic reduction of 4-NP
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mGO@Urea was successfully fabricated and examined for Cu2+ adsorption from aqueous solutions. mGO@Urea was characterized by XRD, FT-IR, SEM, EDX and VSM. Furthermore, the effects of some factors such as pH, adsorbent type, Cu2+ concentration, adsorbent amount and time on adsorption capacity were studied. The isotherm analysis indicates that the sorption data were expressed by Langmuir isotherm model better than Freundlich and the adsorption kinetics was followed from the pseudo-second-order equation. After the adsorption process, the adsorbent could be effortlessly magnetically separated. Also, the catalytic performance of the mGO@Urea@Cu was evaluated for the reduction of p-nitrophenol with NaBH4.
Keywords:Magnetic graphene oxide;Cu(II) adsorption;p-Nitrophenol reduction;Adsorption isotherm;Adsorption kinetics
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