From the fundamentals to recent developments, this book introduces scientists and engineers to photocatalysis and demonstrates its potential for improving water quality. It also points out strategies to increase the photocatalytic efficacy: synthesis of better photocatalysts, combination of photocatalysis with other technologies, and the correct design of photocatalytic reactors. Applications and a chapter on design approaches for photocatalytic reactors round off the book. A must-have read for materials scientists, water chemists, environmental scientists and chemical engineers, whether established researchers or newcomers to the topic.