Synthesis of Cu-SnO<sub>3</sub> NCs by Photo Irradiation Method for Removal Tartrazine Dye Yellow in Aqueous Solutions

Background: Copper tin oxide (Cu-SnO3) is a cheap and easily accessible tunable that has a 2.5-5 eV bandgap. It is a desirable semi-conductor because of these components for a number of applications, including transparent conducting oxides, transistors, solar cells and photocatalytic. Objective: The aim of this research is to increase the rate of yellow dye removal percentage efficiency by using Photo Irradiation Method that rate was determined between (59 to 76) % by the simple chemical method. Methods: Photo irradiation method used to synthesis Cu-SnO3 from precursor materials, the solution is irradiated by photocell for 30min with cooling (5°C) then drop sodium hydroxide (4 g in 100 ml) then washed, isolated by centrifugation for 20 minutes, grinding the dried powder and calcinated at (450 °C). Results: The crystallite size and the crystal structure of Cu-SnO3 NPs are (43-8.2) nm with a tetragonal structure. Field Emission-Scanning Electron Microscopy (FESEM) results displayed the formation of spherical and semispherical and an average size of (35.97 - 74.43) nm. The optical energy gap value (Eg) is 5 eV. It is clear from the disappearance of tartrazine’s yellow hue in an aqueous solution that the combination was shaken at 298 K and 185 rpm. Conclusions: Prove that the removal percentage process by a photo-irradiation method is more effective than other used methods.