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The work focuses on the synthesis of Sm2(WO4)3 nanoparticles through a reagent-free aqueous-phase sonochemical reaction between samarium nitrate hexahydrate and Na2WO4.2H2O solutions. The prepared Sm2(WO4)3 nano-structures were also characterized by XRD, EDS and SEM to evaluate their structures and morphology. The magnetic properties of as-prepared Sm2(WO4)3 nanoparticles were also investigated with vibrating sample magnetometer (VSM). Cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) have been used to investigate the supercapacitive property of the samarium(III) tungstate electrode. The samarium(III) tungstate electrode shows high specific capacitance of 326 F g−1 at scan rate of 2 mV s−1 in 2.0 M H2SO4 electrolyte. Thus, the prepared electrode could be potential electrode materials for supercapacitors.
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