Corn plant leaf extract inhibits microbial growth with the photocatalytic activities of MB, MO, and RdB dye-mediated nano-Cr2O3

• Published in: Nano-Structures & Nano-Objects 2024-09, Vol.39, p.101257, Article 101257
• Main Authors: Ali, Saja Q., Aziz, Wisam J., Kadhim, Duha A., Abid, Muslim A., Sabry, Raad.S.
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Antifungal activity; Corn plant leaf; Cr2O3 NPs; MB dye; MO dye; Photocatalytic activity; RdB dye
• ISSN: 2352-507X
• DOI: 10.1016/j.nanoso.2024.101257

Two approaches were used to produce chromium oxide nanoparticles (Cr2O3 NPs) from corn plant leaf extract: the sol-gel (S-G) method and the simple chemical (S-C) method. These techniques were inexpensive and kind to the environment. Cr2O3 NPs were found to have an average crystallite size via XRD examination of 21 nm at 200 °C, 14–94 nm at 600 °C using the S-C approach, and, the via S-G method, 13–93 nm at 200 °C and 13–92 nm at 600 °C, respectively. Using the S-G approach and the S-C process at 200 and 600 °C, respectively, Cr2O3 NPs with particle sizes of 28–48 nm, 26–36 nm, 25–31 nm, and 78–200 nm were revealed by FE-SEM analysis. The optical band gap values of Cr2O3 NPs were determined via UV-Vis analysis to be 2.5 and 2.8 eV using a S-C technique at 200 and 600 °C, respectively, while the optical band gap values of Cr2O3 NPs were found to be 3 and 3.3 eV using a S-G method at 200 and 600 °C, respectively. The EDX spectra with their picture revealed Cr-O purity with Cr and O occurrences. FT-IR spectroscopy shows the significance of determining the chemical band strength, which was found to be 977 cm−1 of Cr2O3 NPs by the S-C method. While the chemical band strength of Cr2O3 NPs by the S-G method was found to be 642 cm−1. The width of the inhibition zone in the study demonstrated that Cr2O3 NPs made from corn extract exhibited potent antibacterial effects on the test isolates. It varied from 12 to 14 mm for gram-negative bacteria (E. coli and Klbesia) and from 15 to 20 mm for gram-positive bacteria (S. aureus and S. epidermidis) using a S-C method at 200 °C. It ranged from 15 to 17 mm for gram-negative bacteria (E. coli and Klbesia) to 19–22 mm for gram-positive bacteria (S. aureus and S. epidermidis) at 200 °C utilizing a S-G technique. The difference was 16 mm for antifungal (C. albicans) using Cr2O3 NPs via S-G at 200 °C and 15 mm for C. albicans using Cr2O3 NPs via a S-C technique at 200 °C. Using a S-G method, the bacterial suspension varied in diameter at 200, 400, and 600 °C, respectively, for gram-negative (E. coli and Klbesia) and gram-positive (S. aureus and Staphylococcus epidermidis) strains. The gram-negative strains varied in diameter from 20 to 22 mm, 20–21 mm, and 19–21 mm. An antifungal (C. albicans) inhibition zone was created utilizing Cr2O3 NPs in a S-G method at 200, 400, and 600 °C to be 23, 22, and 22 mm wide, respectively. The high degradation efficiency for MB, MO, and (RdB) dye was found from 97 % to 99 % of Cr2O3 NPs synthesis