TPA and PET Photo-Degradation by Heterogeneous Catalysis Using a (Al<sub>2</sub>O<sub>3</sub>)<sub>0.75</sub>TiO<sub>2</sub> Coating
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The combination of the catalytic properties of Al2O3/TiO2 formed an efficient system to degrade the ubiquitous pollutants TPA and PET. The coating (Al2O3)0.75TiO2 was characterized by X-ray diffraction. Stainless steel disks with photo-catalyst coating were placed transversely in a 3.0-L vertical glass reactor with ascending airflow for supplying oxygen to the reaction medium and visible light lamps for photo-activation. The analysis of the coating homogeneity, morphology and particle size distribution of the TiO2 coatings and (Al2O3)0.75TiO2 system were confirmed by SEM. Optical properties and band-gap energy were calculated by using the Tauc equation. UV-Vis spectrophotometry (UV-Vis) and chemical oxygen demand (COD) were the quantitative techniques to measure the reduction of the initial TPA and PET concentrations.