New Journal of Chemistry p. 1436 - 1442 (2016)
Update date:2022-08-25
Topics:
Kadam, Mahesh M.
Dhopte, Kiran B.
Jha, Neetu
Gaikar, Vilas G.
Nemade, Parag R.
A facile low temperature approach was used to synthesize γ-MnO2 on the surface of graphene oxide (GO) through a simple wet precipitation method using MnSO4 as a precursor. X-ray diffraction analysis and Raman spectroscopy confirmed the formation of γ-phase MnO2 in the MnO2/GO nanocomposites. Transmission electron microscopy studies showed that γ-MnO2 exists as flower and needle structures in GO with an average size of approximately 15 nm. Inductively coupled plasma atomic emission spectroscopy studies confirmed a 62.5 wt% loading of γ-MnO2 in the GO nanocomposites. The γ-MnO2/GO catalyst shows good activity for the selective aerobic oxidation of benzyl alcohols to corresponding carbonyl compounds even when present in sub-stoichiometric amounts giving 91% yield over 3 h under mild reaction conditions. The catalyst showed high activity even after three cycles indicating good recyclability.
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