Any semiconductor assisted photocatalytic reaction depends on various parameters like nature and concentration of the organic substrate, concentration and type of the semiconductor, nature of the light source and its intensity, pH of the reaction medium, etc [13–16]. The influence of such rate determining factors on the photodegradation of acid violet has been studied in detail and discussed. In all these studies to ensure a constant illumination and
intensity, a UV light was considered as the source of light.