2.5. Photocatalytic Experiments

The investigation focused on evaluating the photocatalytic efficiency of the photocatalyst through the examination of the degradation process of oxytetracycline hydrochloride (OTC) antibiotics. This evaluation was conducted under controlled conditions using simulated visible light generated by a Xenon lamp with a power output of 15 W. The experimental procedure involved the illumination of the antibiotic solution in the presence and absence of the BiVO₄ photocatalyst. The investigation on photodegradation was conducted using an aqueous solution containing an OTC antibiotic at a concentration of 10 ppm and a total volume of 200 cm³. A quantity of 50 mg of the BiVO₄ catalyst was employed. After the process of photo illumination, a sample of 5 cm³ was obtained. UV Standard spectrophotometric analysis was used to determine the precise concentration of OTC antibiotics.