Fabrication of Cr-ZnFe 2 O 4 /S-g-C 3 N 4 Heterojunction Enriched Charge Separation for Sunlight Responsive Photocatalytic Performance and Antibacterial Study.

There has been a lot of interest in the manufacture of stable, high-efficiency photocatalysts. In this study, initially Cr doped ZnFe 2 O 4 nanoparticles (NPs) were made via surfactant-assisted hydrothermal technique. Then Cr-ZnFe 2 O 4 NPs were modified by incorporating S-g-C 3 N 4 to enhance their photocatalytic efficiency. The morphological, structural, and bonding aspects were analyzed by XRD, FTIR, and SEM techniques. The photocatalytic efficiency of the functional Cr-ZnFe 2 O 4 /S-g-C 3 N 4 (ZFG) heterostructure photocatalysts was examined against MB under sunlight. The produced ZFG-50 composite has the best photocatalytic performance, which is 2.4 and 3.5 times better than that of ZnFe 2 O 4 and S-g-C 3 N 4 , respectively. Experiments revealed that the enhanced photocatalytic activity of the ZFG nanocomposite was caused by a more effective transfer and separation of photo-induced charges. The ZFG photocatalyst can use sunlight for treating polluted water, and the proposed modification of ZnFe 2 O 4 using Cr and S-g-C 3 N 4 is efficient, affordable, and environmentally benign. Under visible light, Gram-positive and Gram-negative bacteria were employed to ZFG-50 NCs' antimicrobial activity. These ZFG-50 NCs also exhibit excellent antibacterial potential.