Engineered g-C 3 N 5 -Based Nanomaterials for Photocatalytic Energy Conversion and Environmental Remediation.

Photocatalysis plays a vital role in sustainable energy conversion and environmental remediation because of its economic, eco-friendly, and effective characteristics. Nitrogen-rich graphitic carbon nitride (g-C 3 N 5 ) has received worldwide interest owing to its facile accessibility, metal-free nature, and appealing electronic band structure. This review summarizes the latest progress for g-C 3 N 5 -based photocatalysts in energy and environmental applications. It begins with the synthesis of pristine g-C 3 N 5 materials with various topologies, followed by several engineering strategies for g-C 3 N 5 , such as elemental doping, defect engineering, and heterojunction creation. In addition, the applications in energy conversion (H 2 evolution, CO 2 reduction, and N 2 fixation) and environmental remediation (NO purification and aqueous pollutant degradation) are discussed. Finally, a summary and some inspiring perspectives on the challenges and possibilities of g-C 3 N 5 -based materials are presented. It is believed that this review will promote the development of emerging g-C 3 N 5 -based photocatalysts for more efficiency in energy conversion and environmental remediation.