Textbook in PDF format This book presents the latest studies of metal oxide decorated nanophotocatalyst for pollutant removal from water bodies. Metal oxide-based nanophotocatalyst is currently considered an efficient material for pollutant removal as compared to other available materials due to its unique characteristics such as low cost, high regenerability, high photocatalytic degradation capacity, environmentally friendly and sustainability. This book elaborates on the basic synthetic route of the nanophotocatalyst to make it highly efficient such as; the presence of active sites, high mechanical strength, conductivity and thermal stability properties. These sustainable and efficient metal oxide-based nanophotocatalyst materials have significant environmental applications and can be applied in different fields. This material has the potential to clean up the different pollutants like volatile organic compounds, CO2 capture, organic and inorganic toxic pollutants, pesticides and colour compounds from the environment. This book gives a sound knowledge of metal oxide-based nanophotocatalyst to the audience regarding the modern design of photocatalytic degradation materials and manufacturing engineering with numerous example illustrations, methods and results for graduate students, researchers and industrialists. Readers will have a quick reference by exploring the research literature on the subject with commercial value-added research applications of metal oxide-based nanophotocatalyst materials. Introduction and Classification of Nanophotocatalysts Synthesis of Nanophotocatalysts Characterization of Nano Photocatalysts Zinc Oxide (ZnO) Based Catalyst for Wastewater Purification Cerium Oxide: Synthesis and Application for Wastewater Purification Study of Nickel Oxide (NiO) in Wastewater Treatment Study of Silver Oxide (Ag2O) in Wastewater Treatment Magnetic Hematite (α-Fe2O3) Photocatalyst in Wastewater Treatment CuO-Based Photocatalysts in Wastewater Purification Sol–Gel and Hydrothermal Synthesis of Zirconium-Based Photocatalysts for Environmental Applications Bimetallic Oxide-Based Photocatalysts in Wastewater Treatment Graphene Oxide-Based Metal Oxide Composites for Wastewater Purification Doped Metal Oxide-Graphene Oxide Nanocomposites: Advanced Materials for Heavy Metals Removal and Wastewater Purification Historical Development of Photocatalyst and Its Application in Water Purification Tin Oxide Materials for Water Purification: Synthesis and Applications