Abstract
? 2022 Elsevier B.V.In this study, BiPO4/CuBi2O4 (BPO-CBO) heterojunctions were prepared via hydrothermal method for singly and simultaneously degrading tetracycline (TC) and reducing Cr(VI) under simulated sunlight. The resultant 30% BPO-CBO heterojunction presented a 0D/1D trepang-like structure with a length of about 4 μm, a diameter about 1.5 μm and a size of 150–200 nm nanoparticles on the surface. It revealed outstanding removal efficiency of 92.0% and 60.3% for TC and Cr(VI) respectively, which were much higher than those results obtained when BiPO4 and CuBi2O4 were used individually. Moreover, the heterojunction displayed outstanding recyclability and reduced no more than 6% of initial time after five cycles. The remarkably enhanced photocatalytic properties were mainly ascribed to the unique trepang-like structure, the built-in electric field between p-n heterojunction and electron transfer the Z-Scheme pathways which was helpful to promote the separation of photogenerated carriers. Additionally, the corresponding reaction pathway and photocatalytic mechanism were further elucidated by the results of capturing experimental, ESR and LC-MS. This research provided a novel perspective for the construction of Z-Scheme p-n heterojunction with 0D/1D trepang-like structure in mixed contaminants purification.
NSTL
Elsevier