Bifunctional Molybdenum Diselenide (MoSe2) Nanosheets for High-Performance Symmetric Supercapacitor Device and Photocatalytic Dye Degradation Application

In this study, MoSe2 nanosheets (NSs) have been prepared via a hydrothermal route. The formation of the as-prepared sample is confirmed through X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) coupled with energy-dispersive spectroscope (EDS). Electrochemical testing of the formed MoSe2NSs for a symmetric supercapacitor cell shows a specific capacitance (Csp) of 300 Fg−1 @ 10 mVs−1. It exhibits an energy density (ED) of 30.4 WhKg−1 @ power density (PD) of 1620 WKg−1. The photocatalytic performance of MoSe2 NSs is examined by the degradation of rhodamine B (RhB) dye. The MoSe2NSs exhibits superior catalytic performance with a 31% elimination efficiency for RhB after 70 min irradiation under natural sunlight. The results show that MoSe2 is an effective bifunctional material for energy storage and photocatalytic applications.