The advancement in the treatment technology for wastewater containing recalcitrant pollutants to lower the overall cost and time of the treatment processes is the prime demand. Biochar (BC) based photocatalyst have proved their potential application in the photo-degradation of a wide range of organic pollutants. The structural and chemical properties of the BC enhance the efficacy of photocatalyst, improving its optical properties with increased stability. This review gives an overview of the progress that occurred during the last five years in BC-based photocatalyst for degradation of recalcitrant organic waste in the aqueous system, emphasizing the role of BC in the photocatalytic performance with a brief discussion regarding the various sources of BC and different strategies used to modify the BC. Further, the critical challenges are discussed, which would be confronted during the scaling up and real-time application in wastewater treatment.

改进含有顽固性污染物的废水处理技术以降低处理过程的总体成本和时间是主要需求。生物炭（BC）基光催化剂已证明其在光降解多种有机污染物中的潜在应用。BC 的结构和化学性质增强了光催化剂的功效，改善了其光学性质并增加了稳定性。本综述概述了过去五年中基于 BC 的光催化剂用于降解水系统中顽固有机废物的进展，强调了 BC 在光催化性能中的作用，并简要讨论了 BC 的各种来源以及用于修改 BC 的不同策略。此外，讨论了关键挑战，