This reference text covers the recent developments in the synthesis of BiOX and their applications in the production of energy and the purification of wastewater. The book begins with an overview of bismuth as well as bismuth oxyhalides and the fabrication process. It then reviews the state-of-the-art improvements in bismuth oxyhalides including elemental doping, surface modification and many others. Photocatalytic applications of bismuth oxyhalides along with their experimental and theoretical studies are discussed. The book also explores bismuth oxyhalides for wastewater treatment, reduction of carbon dioxide, and nitrogen fixation and finally, the various issues and potential solutions that could help with the development of effective photocatalytic bismuth oxyhalides. Key Features Covers recent developments in the synthesis and photocatalytic applications of bismuth oxyhalides (BiOX) Discusses applications including photocatalytic degradation of organic dyes in wastewater and the production of hydrogen Discusses the detailed mechanism of carbon dioxide reduction, nitrogen fixation, and hydrogen production using BiOX semiconductor photocatalyst Reviews the state-of-the-art improvements in bismuth oxyhalides including elemental doping, surface modification and many others Discusses various issues and potential solutions that could help with the development of effective photocatalytic bismuth oxyhalides