Clean environment and green energy are the basic requirements of a sustainable human life. Semiconductor materials play a crucial role in addressing the issues related to increased global energy demand and environmental remediation. The development of photocatalysts has experienced almost exponential progress since their popularization in the early 1970s. Therefore, researchers have started to consider the diversity of photocatalysts globally by approaching this domain from a materials science perspective for applications in various areas. Recently, heterojunction photocatalytic materials have attracted a great amount of multidisciplinary research to face the global concerns of energy production and environmental protection. The unique potential of these technologies has been the stimulus to develop heterojunction photocatalysts with improved structural, morphological, and electronic properties, effectively increasing their efficiency. This book overviews the latest advances in this field, offering insights into the materials and applications of the latest generation of photocatalytic materials. It presents the challenges, future directions, and strategies for design within the area of heterojunction photocatalysts and will be a useful resource to enhance understanding of students, researchers, and academicians for promoting research in this field.

A. Pandikumar is a scientist in the Organic and Materials Electrochemistry Division of the CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, India. He obtained his PhD in chemistry (2014) from the Madurai Kamaraj University, Madurai, India. He successfully completed his postdoctoral fellowship (2014-2016) from the University of Malaya, Malaysia, under its High Impact Research grant. He then joined the Functional Materials Division of the CSIR-Central Electrochemical Research Institute as a scientist. His current research involves development of novel materials with graphene and graphitic carbon nitride, in combination with metals, metal oxides, polymers, and carbon nanotubes, for photocatalysis, photoelectrocatalysis, dye-sensitized solar cells, and electrochemical sensor applications.

K. Jothivenkatachalam is head and a professor at the Department of Chemistry, Anna University-BIT Campus, Tiruchirappalli, India. He obtained his PhD in chemistry from the University of Madras, Chennai, India. His current research focuses on photocatalysis for energy and environmental applications and his other research interests are functional materials, photocatalysis, photoelectrochemistry, photoelectrocatalysis, and dye-sensitized solar cells.

S. Moscow is an assistant professor at the Department of Chemistry, University College of Engineering, BIT Campus, Tiruchirappalli, India. He has been a lecturer at AVVM Sri Pushpam College and an assistant professor at SASTRA University and Anna University-BIT Campus. He has authored and co-authored book chapters and papers in publications of international repute. His areas of research are photochemistry, geochemistry, environmental sciences, and materials chemistry.