Factors Affecting Photocatalytic Activity

This chapter aims to explore various aspects that influence photocatalytic activity, with a particular focus on effluents, pollutant reduction, pharmaceuticals, and fuel generation. It will delve into factors such as material properties (whether suspended or supported), effluent characteristics, and instrumental factors involved in the process, including the sources and intensity of light, as well as the effect of different reactor types (flow or batch). The chapter will examine the potential effects of these factors and emphasize their significant impact on the results. It will provide a comprehensive description of the influence of physicochemical variables, the use of additives like hole scavengers, the characteristics of the medium, and the properties of the photocatalyst. These properties include particle size, surface area, sensitivity to poisoning, possible reactivation, as well as the selection of appropriate electrode materials and applied voltage (in the case of photoelectrocatalysis). Additionally, the chapter will highlight the importance of selecting an appropriate photocatalyst for a specific application, considering factors such as catalytic activity, stability, selectivity toward target pollutants, and the lifespan of the photocatalyst. Furthermore, it will address the challenges and limitations associated with photocatalysis, including the degradation or deactivation of the photocatalyst. These challenges need to be carefully considered during the design of photocatalytic systems and the development of methods to mitigate their impact. By addressing these aspects, the chapter aims to provide a comprehensive understanding of the factors influencing photocatalytic activity and offer insights for optimizing photocatalytic processes in various applications.