Abstract
Bio-derived chitosan-molybdenum di sulfide (Cs–MoS2) nanocomposites are prepared by a simple and economical aqueous casting method with varying concentrations of MoS2. The structural, surface morphological, optical, and electrochemical properties of the nanocomposites were studied. FTIR analysis reveals the strong interaction between Cs and MoS2. FESEM micrograph showed an increment of the surface roughness due to the incorporation of MoS2 layers into Cs. The surface wettability of the nanocomposites was found to be decreased from 73° to 33° due to the incorporation of MoS2 into the chitosan. UV–vis spectroscopy study demonstrates a reduction of optical bandgap from 4.29 to 3.44 eV as the nanofiller, MoS2, introduces localized states within the forbidden energy bandgap. The incorporation of MoS2 was found to increase the specific capacitance of Cs from 421 mFg−1 to 1589 mFg−1 at a current density of 100 μAg-1. The EIS analysis revealed an increase in the pseudo-capacitance from 0.09 μF to 4.13 μF and a reduction of charge transfer resistance that comes from the nanofiller contribution. MoS2 nanoflower introduces more active sites and expands the electroactive zone, thus improving the charge storage property of Cs. The Cs–MoS2 may offer a new route for the synthesis of eco-friendly, biodegradable, and electrical storage devices.
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