Photocatalytic Applications of Fe–Ag Co-Doped TiO2 Nanoparticles in Removal of Flumioxazin Pesticide Residues in Water

Fe-Ag co-doped TiO2 nanoparticles (NPs) were prepared as a photo-catalyst using a precipitation method for the removal of flumioxazin pesticide in water. The analytical method has been validated with specificity, linearity, recovery, precision, the limit of quantification and detection limit. Linearity was determined by different known concentrations of standard solutions. Detection Limit has been identified as the lowest concentration resulting in a 3-fold response to baseline noise. Photolytic and photocatalytic studies were conducted in borosil glass bottles under sunlight at a single fortification level (1.0 μg/mL) in Milli Q water with varying pH proportions (pH 4.0, 7.0 and 9.0). The optimum catalyst concentration recommended for complete degradation was found to be 50 mg/L under sunlight. The HPLC-UV method was used to determine flumioxazin residues in water and the rate constant, DT50 and DT90 values were calculated from the data obtained. The photolytic results do not indicate a significant residue loss due to adsorption. Fe-Ag co-doped TiO2 NPs are an outstanding decontaminating catalyst in various water samples.