“…Recently, various approaches have been employed to improve the chemical and physical properties of nanomaterials. − In order to overcome the above-expressed drawbacks of Cu 2 (PO 4 )(OH) and Cu 2 O structures, formation of a p–n heterojunction nanocomposite can be a potential solution to increase the photocatalytic efficiency. Prior to this, various heterojunction composites of Cu 2 (PO 4 )(OH) and Cu 2 O materials have been fabricated, such as Cu 2 (OH)PO 4 /g-C 3 N 4 , TiO 2 –Cu 2 (OH)PO 4 , Cu 2 (OH)PO 4 /reduced graphene oxide, Cu 2 (OH)PO 4 /Cu, Cu 2 O/CdS/ZnO, Cu 2 O/ZnO/Ag 3 PO 4 , and Cu 2 O/Bi/Bi 2 MoO 6 . ,,,,− The combination of Cu 2 (PO 4 )(OH) and Cu 2 O, due to the generation of the p–n junction heterostructure, can induce a synergistic effect between them and subsequently produce more strong oxidizing agents for outstanding photocatalytic performance under sunlight irradiation.…”