Athira Krishnan is an Assistant Professor at Government Polytechnic College Punalur, Kerala, India. Her research interests lie in designing and developing transition metals-based catalytic materials and fabricating cost-effective catalytic electrodes for green hydrogen production. Sundaram Ganesh Babu is an Assistant Professor in the Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Tamil Nadu, India. His interests include development of nanocatalytic systems for organic transformation, fabrication of visible light active photocatalysts for water splitting, establishment of electrochemical platforms for sensor application, and design of visible light active photocatalysts for environmental remediation.Venkata Ravi Kumar Darbha is an Assistant Professor of Chemistry in the Department of Sciences, Amrita University, Tamil Nadu, India. His research interests include design and synthesis, characterization, and applications of new functional materials, hybrid and porous materials, size- and shape-controlled synthesis of nanomaterials, materials for energy, environmental, and sensor applications, 2D and 1D materials, green photocatalytic technology, and development of photocatalysts for water oxidation and reduction reactions.Yunus Ahmed is an Associate Professor in the Department of Chemistry at Chittagong University of Engineering and Technology, Chattogram, Bangladesh. His research covers a multidisciplinary area, especially catalysis and reaction engineering, bio-reaction engineering, environmental remediation, wastewater treatment, development of biosensors, and nanotechnology.Kishore Sridharan is an Assistant Professor in the Department of Nanoscience and Technology at the University of Calicut, Kerala, India. His research focuses on the fabrication of functional nanostructured materials for applications in visible light-driven photocatalysis.Viswanathan S. Saji is an Associate Professor at the Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia. His current research interest lies in electrochemistry and energy materials.

• Part I – Photocatalysis1. Photocatalysis - Fundamental2. Critical parameters and Performance evaluation3. Metal oxide-based photocatalysts4. Strategies for improving photocatalytic efficiency5. Photocatalysis from lab to industryPart II – Ferric oxide-based photocatalysts6. Ferric oxide – Structure, synthesis, properties and advantages for application in photocatalysis7. Mechanism of ferric oxide photocatalysis8. Approaches to improvement of ferric oxide photocatalytic performances9. Summary and future trends in ferric oxide-based photocatalysisPart III – Zinc oxide-based photocatalysts10. Zinc oxide – Structure, synthesis, properties and advantages for application in photocatalysis11. Mechanism of zinc oxide photocatalysis12. Strategies to improve the performance of zinc oxide photocatalysts13. Summary and future trends in zinc oxide-based photocatalysis