Bifunctional rGO incorporated NiSe2 nanocomposite as a photocatalyst and an electrode in supercapacitor

Abstract

The rGO incorporated NiSe2 nanocomposite (NC) has been synthesized by hydrothermal method and the photocatalytic and electrochemical performance were reported. From the VSM analysis, the magnetic properties such as coercivity, magnetic retentivity and saturation of the synthesized NC have been calculated. Since the synthesized NC has a high surface-to-volume ratio, the specific capacitance as well as absorption capability of dyes from the wastewater are enhanced. The rGO incorporated NiSe2 NC exhibits 98.8% degradation of Rhodamine B after 120 min. The synthesized NC shows superior photocatalytic performance and it can also be recovered after degradation by applying an external magnetic field. The rGO incorporated NiSe2 NC shows a high specific capacitance of 510 Fg−1 at 5 mV/sec with an ideal capacitive behavior using LiOH electrolyte. The synthesized NC retains 59% of its initial capacitance at the high current density of 10 Ag−1 indicating good charging and discharging capability. Results revealed that rGO incorporated NiSe2 NC is a promising material to be used in dye degradation and as an electrode material for supercapacitors.