Industrial problems and solution towards visible light photocatalysis

Visible light photocatalysis for the remediation of water laden with effluents from industries has been the subject of extensive research over the past few decades, resulting in the production of many scientific reports. Though this technique is cost-effective, eco-friendly, and easily available, application on an industrial scale is far from being realized. In this chapter, we review the recent advancements in the photocatalysis in the direction of wastewater treatment from the viewpoint of three generations of photocatalysts, their drawbacks, and advantages. Several strategies proposed by various researchers aiming to bring in industrially relevant water treatment processes have been discussed. Further, an overview of prevalent industrial problems along with their solutions and advancements provided in the chapter will definitely enrich the literature and help to achieve a better future in terms of technology transfer from bench scale to industrial scale.