Photocatalytic Degradation of Dye Acid Orange Seven on Titanium Dioxide Photocatalysts Immobilized on Stainless Steel Coated Layers: Role of Catalyst Loading and Ultrasonic Treatment

Supported titanium dioxide (TiO2) was investigated for potential application in photocatalytic degradation of dye acid Orange 7 textile wastewater. Two commercial powder photocatalysts, Degussa (P25) and Precheza (AV01), were immobilized on stainless steel plates dimensions (75 mm × 25 mm) through Electrophoretic Deposition Process (EPD) from aqueous colloidal suspensions n-TiO2, c=10 g.L-1 produced methanol. sets coated layers prepared - using ultrasonically treated TiO2 without ultrasonic treatment. The fitted onto a four-hole reactor operating under batch-mode conditions. As source UV light, Sylvania LynxS, 11W lamps emitting light wavelength between 320-400 nm with maximum at λ=355 used. current study aimed to evaluate the effect treatment catalyst’s suspension electrophoretic deposition loading (mg/cm2) its surface area resultant Acid 7. monitored by changes absorbance 120 minutes an interval 30 minutes. Changes concentration determined ultraviolet spectrophotometry λ = 485 nm. initial used experiments c=1×10-4 mol. L-1. findings show that 61.1 % mineralization achieved after degradation. optimum catalytic 0.75 mg/cm2 two catalysts (P25/AV01) non-ultrasonically (AV01). Ultrasonic before immobilisation positively influenced activity, whereas negatively affected photoactivity Overall, (AV01) proved be more efficient 28.6%, compared (P25). results UV-TiO2 model remediation coloured