Use of Co3O4 nanoparticles with different surface morphologies for removal of toxic substances and investigation of antimicrobial activities via in vivo studies

• Published in: Environmental science and pollution research international Vol. 30; no. 48; pp. 106585 - 106597
• Main Authors: Kurnaz Yetim, Nurdan, Hasanoğlu Özkan, Elvan, Öğütçü, Hatice
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2023; Springer Nature B.V
• Subjects: Aminophenol; Antibacterial activity; Antibiotics; Antimicrobial activity; Antimicrobial agents; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Bacteria; Biocompatibility; Biomedical materials; Catalysts; Cobalt oxides; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Gram-negative bacteria; Gram-positive bacteria; In vivo methods and tests; Medical wastes; Methylene blue; Microorganisms; Morphology; Nanoparticles; Nitrophenol; p-Aminophenol; p-Nitrophenol; Rate constants; Reduction; Research Article; Sodium hydroxide; Toxic substances; Urea; Waste Water Technology; Wastewater treatment; Water Management; Water Pollution Control; X ray photoelectron spectroscopy; Antimicrobial activity; Hydrothermal synthesis; Co; p-NP; O; Methylene blue
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-023-29879-7

Co 3 O 4 nanoparticles (NPs) were formed using hydrothermal synthesis method and various surfactants to study the effect of changing surface morphology on catalytic and antibacterial activities. FT-IR, TEM, SEM, BET, XRD, and XPS analyses were performed to characterize the NPs. It was observed that as the morphology of Co 3 O 4 changes, it creates differences in the reduction efficiency of organic dyes and p-nitrophenol (p-NP), which are toxic to living organisms and widely used in industry. The reaction rate constants ( K app ) for Co 3 O 4 -urea, Co 3 O 4 -ed, and Co 3 O 4 -NaOH in the reduction of p-NP were found to be 1.86 × 10 −2  s −1 , 1.83 × 10 −2  s −1 , and 2.4 × 10 −3  s −1 , respectively. In the presence of Co 3 O 4 -urea catalyst from the prepared nanoparticles, 99.29% conversion to p-aminophenol (p-AP) was observed, while in the presence of the same catalyst, 98.06% of methylene blue (MB) was removed within 1 h. The antibacterial activity of Co 3 O 4 particles was compared with five standard antibiotics for both gram-positive and gram-negative bacteria. The results obtained indicate that the antimicrobial activity of the synthesized Co 3 O 4 particles has a remarkable inhibitory effect on the growth of various pathogenic microorganisms. The current work could be an innovative and beneficial search for both biomedical and wastewater treatment applications.