Photocatalytic Degradation of Rhodamine-B and Water Densification via Eco-Friendly Synthesized Cr2O3 and Ag@Cr2O3 Using Garlic Peel Aqueous Extract

• Published in: Nanomaterials (Basel, Switzerland) Vol. 14; no. 3; p. 289
• Main Authors: Alqarni, Laila S., Alghamdi, Maha D., Alshahrani, Aisha A., Alotaibi, Nasser F., Moustafa, Shaima M. N., Ashammari, Khulaif, Alruwaili, Ibtihal A., Nassar, Amr Mohammad
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.02.2024
• Subjects: Absorption spectra; Allium sativum; antimicrobial; Antimicrobial activity; Antimicrobial agents; Biosynthesis; Catalytic activity; Chromium; Chromium oxides; Cr2O3-NPs; Densification; E coli; Electron microscopes; Electron microscopy; Energy dispersive X ray analysis; Garlic; Gravimetric analysis; Infrared analysis; Infrared spectra; Irradiation; Metal oxides; Nanoparticles; Nitrates; Photocatalysis; photocatalyst; Photodegradation; Photoelectron spectroscopy; Photoelectrons; Phytochemicals; Plant extracts; Recycling; Rhodamine; Scanning electron microscopy; Silver; Silver nitrate; Solar radiation; Strains (organisms); Synergistic effect; Thermal analysis; Thermogravimetric analysis; Transmission electron microscopy; Water reuse; X ray analysis; X ray photoelectron spectroscopy; X-ray diffraction; United States > US; Japan
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano14030289

The purification and densification of wastewater play an important role in water recycling, especially if the materials used in water recycling are other types of recycled waste. Therefore, considering this view in this study, the biosynthesis of silver-decorated chromium oxide nanoparticles utilizing a wasted Allium sativum (garlic) peel extract is investigated. The aqueous extract of garlic peel (GPE) was treated with silver nitrate, chromium nitrate, and a mixture of silver nitrate and chromium nitrate to synthesize silver nanoparticles (Ag-garlic), chromium oxide nanoparticles (Cr2O3-garlic), and silver-decorated chromium oxide nanoparticles (Ag@Cr2O3-garlic), respectively. The synthesized nanoparticles were elucidated via thermal gravimetric analysis (TGA), infrared spectra (FT-IR), absorption spectra (UV-Vis), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Antimicrobial activity studies were conducted against waterborne germs, bacterial strains (Bacillus subtilis, Enterococcus faecium, Escherichia coli, and Pseudomonas aeruginosa), and fungal strains (Alternaria porri, Aspergillus flavus, Aspergillus niger, Fuserium oxysporum, and Trichoderma longibrachiatum) and showed significant levels of antimicrobial activity. The results revealed that Ag@Cr2O3 significantly improved antimicrobial activity due to their synergistic effect. The photocatalytic activity of nanoparticles was assessed using Rhodamine B dye (5 ppm) under solar irradiation. Cr2O3-garlic exhibited the best activity as a photocatalyst among the studied nanoparticles, with 97.5% degradation efficiency under optimal conditions.