A facile novel synthesis of AgCuO2 delafossite nanoparticles and evaluation of their antimicrobial activity

Abstract

Bi-functional nano-oxides are of growing interest to address environmental issues. In the present study, the structural and magnetic data are presented together with the antimicrobial activities (AMA). For the first time, silver delafossite oxide (AgCuO2) is successfully fabricated using a simple, low-cost technique to target antibiotic photodegradation and inactivation of model waterborne pathogens. It is prepared with an equimolar initial Ag+:Cu+ concentration ratio. The structure, morphology, and magnetic properties are studied by different characterization techniques. The size and shape of AgCuO2 NPs, in addition to their structural polytypes of 2H (hexagonal) or 3R (rhombohedral), are dependent on the preparation conditions. The existence of Cu, Ag, and O in the synthesized delafossite AgCuO2 NPs with no evidence of any impurity is ratified by the XPS spectrum. AFM measurements are taken to characterize the surface morphologies of AgCuO2. The distributed spiks are evaluated by roughness kurtosis (Rku). The roughness kurtosis has a value of 2.65 (< 3), indicating that the prepared sample is classified as bumpy. The prepared sample has 13.0, 10.0, 14.0, and 14.0 mm Inhibition Zone Diameter (IZD) antimicrobial activity against gram-positive Bacillus subtilis (B. subtilis), Bacillus cereus (B. cereus), Enterococcus faecalis (E. faecalis), and Staphylococcus aureus (S. aureus), respectively. The IZD for gram-negative Escherichia coli (E. coli), Neisseria Gonorrhoeae (N. Gonorrhoeae), Pseudomonas aeruginosa (P. aeruginosa), and Salmonella typhimrium (S. typhimrium) were found to be 12.0, 13.0, 14.0, and 13.0 mm, respectively. Therefore, the AgCuO2 NPs reveal excellent antimicrobial efficiency, and they can be effortlessly separated using a tiny magnet or a simple magnetic separator. The adequate cytotoxicity and magnetic characteristics of the antimicrobial sample suggest a promising future for it in biomedical applications.

Multi-susceptible single-phased hexaferrite with significant magnetic switching properties by selectively doping

“…The other two peaks at 936.7 eV and 956.6 eV are related to Cu (II) 2p 3/2 and 2p 1/2 , respectively. Three satellite peaks are detected; the peaks at 940.7 eV and 943.8 eV correspond to Cu 2+ 2p 3/2 , and the other one at 961.7 eV corresponds to Cu 2+ 2p 1/2 , as shown in figure 7(e) [46,47]. ) is caused by the adsorbed oxygen element during sample synthesis [48].…”

Designing bi-functional Ag-CoGd0.025Er0.05Fe1.925O4 nanoarchitecture via green method

“…As starting ingredients, stoichiometric concentrations of high purity (99.9%, Fisher chemicals) nitrates of iron, cobalt, gadolinium, erbium, and citric acid were utilized. Further details about the preparation method can be found in previous works [25][26][27].…”

In Vitro Bactericidal Activity of Biogenic Copper Oxide Nanoparticles for Neisseria gonorrhoeae with Enhanced Compatibility for Human Cells

“…21 A few reports in the literature cite the development of nanoparticles as antimicrobials against gonococci, namely chitosan nanoparticles, 22 silver nanoclusters, 23 and recently silver delafossite oxide (AgCuO 2 ) nanoparticles synthesized using the citrate combustion method. 24 Copper itself is already known as an antimicrobial against the gonococcus. 25 However, there are no reports of the antigonococcal activity of biogenic copper oxide nanoparticles (CuO NPs).…”