Well-constructed CeO2-coated CuBi2O4 heterojunction: Enhanced charge carriers transportation

Addressing the issues of hazardous organisms and their facilitated diffusion is crucial for ensuring the long-term viability of maritime industries and safeguarding marine ecosystems. In this study, a p-n heterostructure scheme of CuBi 2 O 4 @CeO 2 photocatalysts was established by a facile wet chemical in-situ deposition for marine bacteria inactivation, experimental results demonstrate that the introduction of CeO 2 enhances overall bacterial sterilization efficacy, 15%CuBi 2 O 4 @CeO 2 exhibits the priority sterilization efficiency about 3.3, and 2.8 times to pure CeO 2 and pure CuBi 2 O 4 , respectively, and the inactivation effects of •OH is superior to the other mainstream active species. Moreover, incorporating CeO 2 film on the surface of CuBi 2 O 4 contributes to the selectively production of active species, shorten the electron transfer distance, and improves light response efficiency which derive from the innovative heterostructure design, a rational connection bridge between CeO 2 and CuBi 2 O 4 based on the band structure positioning, facilitates faster separation and transfer of photo-generated carriers while simultaneously suppressing charge carriers recombination. This paper offers an methodology and construction of harmless heterostructure photocatalysts for ballast water treatment and fosters a deeper understanding of the underlying photocatalytic mechanisms.