Photocatalytic degradation of oxamyl pesticide by adsorption using bentonite/titanium dioxide nanocomposite doped with nickel

The insecticide Oxamyl is available in two forms: granulated and liquid. Eliminating spoilage bacteria in food, drinking water, and sewage treatment is one of the crucial uses of titanium dioxide nanoparticles. Bentonite/TiO2 nanocomposite Ni doping composite and synthetic bentonite/TiO2 composite were produced. The produced nanocomposite were identified using X-ray diffraction, Scanning electron microscopy, elemental analysis, TGA and reflection spectroscopy. The inclusion of Nickel significantly boosts the antibacterial and photocatalytic activity of titanium dioxide/bentonite nanocomposite, may be this is the cause of reaction Nickel ions with nanocomposite. The composites showed thermal stability up to 1000 °C. The produced materials were used in the Oxamyl degradation process. A variety of degrading process parameters were examined. Oxamyl was found to photodegrade in a pH-dependent manner, with pH 12 causing the greatest clearance. The fact that the percentage of removal decreased as catalyst concentration increased indicates that a very small amount of catalyst is required for the degradation. When bentonite and TiO2 composite was present, the maximum degradation rate was 89.5% in 120 min, but when Bentonite/TiO2 composite with Ni doping was included, the maximum degradation rate was 99% for a maximum of 120 min. It is noted that first order kinetics principles apply to the photodegradation. The decrease in the energy gap of titanium dioxide nanoparticles in nanocomposite was associated with the rise in the generation of free radicals and active oxygen brought on by the increase in photocatalytic activity.