Photothermal Materials and Membranes for Solar-Driven Water Treatment provides a comprehensive understanding of the chemistry of different photothermal materials, mechanistic pathways for light-to-heat energy conversion, design, and development of various 3D evaporation systems configurations, and photothermal membranes for water treatment. The book contributes to the understanding of photothermal materials to system design for efficient solar-to-heat conversion and solar-steam generation and paves the way forward to meet increasing freshwater demand through a sustainable and environmentally friendly approach. The book provides an in-depth introduction to emerging concepts such as steam generation; gives the basics of solar light and solar-light-adsorbing materials’ function, efficiency, and applications; discusses the preparation of photothermal materials and membranes; analyzes the key characteristic properties of photothermal materials; elaborates on water evaporation using nature-inspired system design; and highlights the key commercialization approaches and technologies. This book is an excellent resource for chemical engineers, materials scientists, energy technologists, environmentalists, policymakers, and regulatory bodies working on water treatment, wastewater decontamination, photothermal materials and membranes, photocatalytic materials, membrane separation, and membrane filtration.