Visible-Light-Driven Photocatalytic Treatment by Environmental Minerals

Abstract

Naturally occurring semiconductor minerals can perform visible-light-driven (VLD) photocatalysis for environmental remediation that have attracted particular attention. Compared with frequently reported VLD photocatalysts that are tedious in fabrication procedure and expensive for massive production, these materials are readily obtained in large quantity at lower cost. Specially, some minerals containing iron, which makes the minerals become visible light responsive and magnetic, possess great potential for materials recycle. The acceptable performance with regard to photocatalytic activity and its superior properties enable them to be good candidates for cost-effective VLD photocatalytic treatment of toxic organics and infectious microbes in water and wastewater samples. This chapter presents an overview of current research activities that center on utilizing natural semiconductor minerals for water disinfection under visible light irradiation. It is organized into two major parts. One is the development of natural and natural magnetic materials for environmental remediation. The other part is the development and modification of materials to elevate its photocatalytic activity for application. Finally, we conclude with a discussion of what major advancements are needed to move the field of photocatalytic water disinfection forward.