Abstract
In this research, we synthesized 2D-corrugated sheet-like nanostructure of MoSe2 (MS) and selenium-enriched MoSe2 (MS-S) using a hydrothermal method to evaluate the electrochemical and photocatalytic performance. Electrochemical assessments revealed that MS-S exhibits an outstanding specific capacitance of 275 F g−1 at a scan rate of 10 mV s−1, showcasing its suitability as a symmetric supercapacitor. Particularly noteworthy is the outstanding energy density observed in MS-S, reaching 36.72 Wh kg−1, a value nearly seven times higher than that of MS (5.33 Wh kg−1). Furthermore, MS-S demonstrated remarkable capacitance retention, retaining 68 % of its initial capacitance even after 2000 cycles. In contrast, MS exhibited only 17 % retention over the same cycle count. Additionally, we evaluated the photocatalytic efficacy of the MS and MS-S samples in degrading rhodamine B (RhB) dye in a solution utilizing a 30 W white LED light source. Impressively, after 50 minutes of light exposure, MS-S displayed an outstanding degradation efficiency of up to 86 %, significantly surpassing the performance of MS. These results emphasize the immense potential of MS-S as a highly promising material suitable for a range of applications, including supercapacitors and dye degradation.
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