Activity tests of immobilized TiO2 photocatalysts and Au/TiO2 plasmon photocatalysts for oxidative degradation of dissolved bisphenol A (BPA) were performed in a batch reactor with recirculation. Commercially available TiO2 nanoparticles were used as the base material for the photocatalysts, to which 1 wt. % Au was added by wet impregnation. Oxidative degradation was performed at three different flow rates under ultraviolet (UV) and visible (VIS) light on two types of immobilized photocatalysts, TiO2 and Au/TiO2. Each type of photocatalyst was immobilized in two ways, either by dip coater or spin coater. The efficiency of oxidative degradation of BPA was monitored using high precision liquid cromatography (HPLC) with a UV diode detector. The best degradation was achieved with spin coater immobolized Au/TiO2 photocatalyst under UV light and a flow rate of 60 mL/min. The relative concentration of BPA fell by 52.4%. The degree of BPA mineralization was determined using total carbon analysis (TOC). The highest percentage of total organic carbon removed was 51 % and was also achieved with oxidative degradation of BPA with spin coater immobolized Au/TiO2 photocatalyst under UV light and a flow rate of 60 mL/min.
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