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Open AccessArticle

Adsorption of Sb (III) on Oxidized Exfoliated Graphite Nanoplatelets

National Research & Development Institute for Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independentei Street, 060021 Bucharest, Romania
Faculty of Applied Chemistry and Material Science, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independentei Street, 060021 Bucharest, Romania
“Horia Hulubei” National Institute for Physics and Nuclear Engineering—IFIN HH, 30 Reactorului Street, P.O. Box MG-6, 077125 Bucharest-Magurele, Romania
Authors to whom correspondence should be addressed.
Nanomaterials 2018, 8(12), 992;
Received: 31 October 2018 / Revised: 13 November 2018 / Accepted: 27 November 2018 / Published: 30 November 2018
In this work, Sb (III) adsorption on oxidized exfoliated graphite nanoplatelets (ox-xGnP) was evaluated for the first time, to the best of our knowledge. The ox-xGnP were characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmet–Teller (BET) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM) equipped with energy-dispersive X-ray spectroscopy (EDX), and Zeta potential analysis. The adsorption parameters, such as pH and contact time, were optimized, and the best adsorption capacity obtained was 8.91 mg g−1 at pH = 7.0, 1.0 mg ox-xGnP/100 mL solution, T = 293 K, 1.0 mg L−1, Sb (III), 25 min contact time. The best correlation of the kinetic data was described by a pseudo-first-order kinetic model, with R2 = 0.999. The adsorption isotherms of Sb (III) onto ox-xGnP were best described by the Langmuir isotherm model. The thermodynamic parameters showed that the adsorption process was exothermic and spontaneous. View Full-Text
Keywords: Sb(III); adsorption; oxidized exfoliated graphite nanoplatelets Sb(III); adsorption; oxidized exfoliated graphite nanoplatelets
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Capra, L.; Manolache, M.; Ion, I.; Stoica, R.; Stinga, G.; Doncea, S.M.; Alexandrescu, E.; Somoghi, R.; Calin, M.R.; Radulescu, I.; Ivan, G.R.; Deaconu, M.; Ion, A.C. Adsorption of Sb (III) on Oxidized Exfoliated Graphite Nanoplatelets. Nanomaterials 2018, 8, 992.

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