Study on the Influence of Ni2+ Doping on the Photocatalytic Performance of ZnGa2O4

In the realm of green chemistry, the pursuit of proficient ZnGa ₂ O ₄ photocatalysts emerges as a crucial endeavor. Photocatalytic process serves as a cornerstone in addressing urgent environmental challenges, encompassing tasks such as hydrogen generation through water splitting, the reduction of pollutants, and the decomposition of organic dyes. This study specifically investigates the photocatalytic activity of ZnGa ₂ O ₄ in the decomposition of Rhodamine B and the photolysis of water, which are critical for environmental remediation. Despite the promising potential of ZnGa ₂ O ₄ in photocatalysis, its wide bandgap presents limitations to light absorption efficiency, necessitating refined enhancements to its catalytic performance. This scholarly investigation delineates the synthesis and evaluation of a meticulously engineered Ni ²⁺ -doped ZnGa ₂ O ₄ photocatalyst. Through systematic optimization of synthesis parameters, our study unveils that Zn _0.9985 Ni _0.0015 Ga ₂ O ₄ , with a Ni ²⁺ doping concentration of 0.15%, subjected to calcination at 700°C and annealed for 0.5 hours, represents the pinnacle of photocatalytic activity. This finding charts a trajectory towards sustainable remediation strategies, embodying a significant step forward in environmental stewardship.