Application of Ag-doped TiO2 nanoparticle prepared by photodeposition method for nitrate photocatalytic removal from aqueous solutions

AbstractNitrate pollution in surface and groundwater resources is considered as an environmental challenge because of the potential risks of nitrate in diseases such as methemoglobinemia, lymphatic disturbances, and blood cancer. On the other hand, nanomaterials have been recently applied for the control of water pollutants. The objective of this research was to investigate the efficiency of silver-doped TiO2 nanoparticles prepared by photodeposition method under UV irradiation for nitrate removal. Ag-doped TiO2 nanomaterials (Ag/Ti = 0.1 at %) were characterized by scanning electron microscope-energy dispersive X ray, transmission electron microscope, X-ray diffraction, and BET and used in doses of 0.1, 0.4, 0.8, and 1.2 g/L. Three nitrate concentrations of 20, 50, and 100 mg/l were considered in the pH range of 5–9. The effect of Ag-doped TiO2 nanoparticles both in dark and with UV irradiation was studied. Nitrite and ammonia, as intermediates of photocatalytic degradation of nitrate, were detected by s...

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