The efficient utilization of solar energy through photocatalysis is ideal for solving environmental issues and the development sustainable future.BiOBr-based semiconductors possess unique narrowed bandgaps and layered structures,thereby widely studied as photocatalysts for environmental remediation.However,a little has been focused on the comprehensive reviewing of BiOBr despite its extensive and promising applications.In this review,the state-of-the-art developments of BiOBr-based photocatalysts for environmental remediation are summarized.Particular focus is paid to the synthetic strategies for the control of the resulting morphologies,as well as efficient modification strategies for improving the photocatalytic activities.These include boosting the bulk phase by charge separation,enhancing the spatial charge separation,and engineering the surface states.The environmental uses of BiOBr-based photocatalysts are also reviewed in terms of purification of pollutants and CO2 reduction.Finally,future challenges and opportunities of BiOBr-based materials in photocatalysis are discussed.Overall,this review provides a good basis for future exploration of high-efficiency solar-driven photocatalysts for environmental sustainability.