Hierarchical Z-scheme Bi2S3/CdS heterojunction: Controllable morphology and excellent photocatalytic antibacterial

The hierarchical nanostructure can significantly increase photocatalytic centers and enhance light harvesting. In this study, a series of hierarchical Z-scheme Bi2S3/CdS heterojunctions with solvent-dependent morphologies are synthesized by a solvothermal method. The Bi2S3/CdS nanostructures synthesized in ethylene glycol (BC-EG) and N, N-dimethylformamide (BC-DMF) are assembled by Bi2S3 nanowires and CdS nanoparticles. Notably, the photocatalytic efficiency of BC-DMF for the antibacterial of E.coli and S.aureus is 100.00 % and 93.85%, respectively. The improvement of photocatalytic activity by BC-DMF is mainly ascribed to the increased pho-tocatalytic active centers, enhanced photo-induced carriers separation and transfer between Bi2S3 and CdS as a Z-scheme heterojunction and the relatively suitable Bi2S3/CdS ratio. This study can provide an insight into constructing Z-scheme hierarchical photocatalysts for antibacterial.

Automated summary

Hierarchical nanostructures with solvent-dependent morphologies were synthesized in this study to form Z-scheme Bi2S3/CdS heterojunctions, with BC-DMF exhibiting significant photocatalytic efficiency towards E.coli and S.aureus. This improvement was attributed to increased photocatalytic active centers, enhanced photo-induced carriers separation and transfer, and a suitable Bi2S3/CdS ratio.