Microwave assisted ultrafast synthesis of graphene oxide based magnetic nano composite for environmental remediation |
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Affiliation: | 1. School of Nano Sciences, Central University of Gujarat, Gandhinagar, Gujarat, 382021, India;2. Facilitation Centre for Industrial Plasma Technologies, Institute for Plasma Research, Gandhinagar, India |
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Abstract: | We have successfully synthesized multi-layer graphene oxide and graphene oxide based magnetic nanocomposite (M/GO) by microwave-assisted modified Hummers’ method for removal of toxic lead (Pb2+) and cadmium (Cd2+) ions from aqueous solution. The X-ray diffraction spectra of synthesized graphene oxide and M/GO confirm increased interlayer spacing along c-axis. Raman spectra revealed the good quality of synthesized GO and M/GO. The wrinkles were seen in the SEM images of synthesized graphene oxide. The presence of conjugated double bond (C C) and carbonyl (C O) were confirmed by using the UV–Vis spectroscopic spectra. Brunauer–Emmett–Teller (BET) analysis showed high (126 m2/g) surface area M/GO composite which accounts for large number of active binding sites for the adsorption of heavy metal ions. The adsorption studies revealed that Pb2+ ions were efficiently adsorbed on GO sheets. Interestingly, M/GO showed better adsorption for cadmium ions. |
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Keywords: | Heavy metal ions Expanded graphite Graphene oxide Microwave-assisted method |
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