Hydrothermally synthesized reduced graphene oxide and Sn doped manganese dioxide nanocomposites for supercapacitors and dopamine sensors
作者： Dhanush Shanbhag , K. Bindu , A.R. Aarathy , Martha Ramesh , M. Sreejesh
DOI: 10.1016/J.MTENER.2017.03.006
关键词: Nanowire 、 BET theory 、 Crystallite 、 Graphene 、 Chronoamperometry 、 Nanocomposite 、 Supercapacitor 、 Materials science 、 Nanotechnology 、 Oxide 、 Chemical engineering
摘要: Abstract α-MnO 2 nanowires and its nanocomposites (rGO-MnO Sn@rGO-MnO ) were synthesized by a facile hydrothermal technique. Two important electrochemical applications of nanocomposites, viz, electrodes for supercapacitor sensors biomolecule, dopamine are reported. The prepared have been characterized XRD, which reveals smaller crystallite size rGO- MnO composites compared to pristine the trend is supported BET analysis. wrapping NWs with rGO sheets increases surface area, as well as, creates more dislocations at interfaces. correlation between physicochemical properties leads an enhancement in performance materials. as-fabricated electrode superior performance. specific capacitance 139.05, 309.7 460.9 F/g scanning rate 20 mV/s, aqueous Na SO 4 solution (1 M) obtained , rGO-MnO 2, respectively. Also, reported show excellent towards detection dopamine. Among /GCE, /GCE based Dopamine detection, sensor exhibits highest sensitivity 433.6 μA/mM broad linear range, whereas lower limit 0.13 μM.
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