The most pressing concerns in environmental remediation are the design and development of catalysts with benign, low-cost, and efficient photocatalytic activity. The present study effectively generated a flower-like indium oxide (In2O3-MF) catalyst employing a convenient MOF-based solvothermal self-assembly technique. The In2O3-MF photocatalyst exhibits a flower-like structure, according to morphology and structural analysis. The enhanced photocatalytic activity of the In2O3-MF catalyst for 4-nitrophenol (4-NP) and methylene blue (MB) is likely due to its unique 3D structure, which includes a large surface area (486.95 m2 g-1), a wide spectrum response, and the prevention of electron-hole recombination compared to In2O3-MR (indium oxide-micro rod) and In2O3-MD (indium oxide-micro disc). In the presence of NaBH4 and visible light, the catalytic performances of the In2O3-MF, In2O3-MR, and In2O3-MD catalysts for the reduction of 4-NP and MB degradation were investigated. Using In2O3-MF as a catalyst, we were able to achieve a 99.32 percent reduction of 4-NP in 20 min and 99.2 percent degradation of MB in 3 min. Interestingly, the conversion rates of catalytic 4-NP and MB were still larger than 95 and 96 percent after five consecutive cycles of catalytic tests, suggesting that the In2O3-MF catalyst has outstanding catalytic performance and a high reutilization rate.
The surface morphologies of the active electrode materials have a significant impact on the electrochemical performance of supercapacitors. The Ni-mixed CuCo2S4 materials were successfully prepared on Ni-Foam using the hydrothermal method followed by the sulfidation process. CuCo1.5Ni0.5S4 has a nanoneedle structure, whereas CuCo1.0Ni1.0S4 has a vertically aligned nanograss structure. Due to the high theoretical capacity and redox behavior of Ni, Co, and Cu elements, the low electronegativity of S atoms, favorable structural behavior, and low hydration sphere radius with high ionic mobility character of OH– ions, the resulting CuCo1.0Ni1.0S4 nanograss was used as a binder-free electrode for supercapacitor application. It has delivered outstanding specific capacity, rate capability, and cycle performance characteristics. The CuCo1.0Ni1.0S4 electrode produced a maximum specific capacity of 325.5 mA h/g at a current density of 1 A/g, while maintaining good rate capability. After 5000 cycles at 20 A/g, the CuCo1.0Ni1.0S4 electrode retains 86% of its initial capacity. Furthermore, the asymmetric supercapacitor device is made with CuCo1.0Ni1.0S4 as the positive electrode material and activated carbon as the negative electrode material. The fabricated ASC has a maximum energy density of 38.5 W h/kg at a power density of 356 W/kg. In summary, the CuCo1.0Ni1.0S4 electrode is a promising material for electrochemical energy storage and conversion applications.
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