Microstructure and Antibacterial Properties of Chitosan-Fe3O4-AgNP Nanocomposite

Abstract

The goal of this research is to synthesize and characterize Fe3O4@Chitosan-AgNP nanocomposites in order to determine their antibacterial activity. The research methods include the synthesis of Fe3O4@Chitosan-AgNP nanocomposites, as well as the characterization of nanoparticles using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) analysis, and subsequent antibacterial activity tests. The study’s findings demonstrated the successful synthesis of Fe3O4@Chitosan-AgNP nanocomposites, followed by nanoparticle characterization using SEM, TEM, XRD, and FTIR. Based on the XRD results, the conjugation of Fe3O4@Chitosan-AgNP nanocomposites has been successfully formed, as evidenced by the appearance of characteristic peaks of Fe3O4, chitosan, and AgNPs. According to the FTIR results, the interaction between chitosan-AgNPs and conjugated Fe3O4 occurred via the N atom in the NH2 group and the O atom in the OH group, and C=O. The SEM and TEM images also show that the Fe3O4@Chitosan-AgNP conjugation is a nanoparticle-based composite material. The combination of nanocomposites Fe3O4@Chitosan-AgNPs has antibacterial activity, inhibiting the growth of bacteria such as Bacillus cereus and Escherichia coli.

Exploring Dielectric and Magnetic Properties of Ni and Co Ferrites through Biopolymer Composite Films

“…For the sample CG11, four distinct peaks, located at 2θ = 11.9 • , 18.5 • , 23.4 • and 29.4 • , can be observed. These peaks are specific characteristic functional peaks of semi-crystalline chitosan, as shown in the literature [37,38].…”

Precipitation‐Based Silk Fibroin Fast Gelling, Highly Adhesive, and Magnetic Nanocomposite Hydrogel for Repair of Irregular Bone Defects

“…These results demonstrated the formation of metal–phenolic coordination bonds between Fe 3 O 4 NPs and TA. [ 33 ] XRD analysis was used to further verify the existence of Fe 3 O 4 and the structural change upon formation of the hydrogel (Figure 1F), which exhibited the characteristic absorption peaks representing Fe 3 O 4 NPs and their 2θ values (25.0°, 35.8°, 43.4°, 57.3°, and 63.0°) releated to the standard Fe 3 O 4 reflections, including the highest peak, with a crystallographic plane (311) at 2θ = 35.8°, which was similar to the results of Hartati et al.. [ 34 ] The characteristic absorption peaks of Fe 3 O 4 also existed in the RSF/TA/Fe 3 O 4 hydrogels, with increasing Fe 3 O 4 concentrations resulting in higher intensities, demonstrating the existence of Fe 3 O 4 NPs. Moreover, the 2θ peak at 20.9° in the RSF/TA/Fe 3 O 4 hydrogels indicated the formation of a β‐sheet structure.…”

Silver Nanoparticles-Chitosan Nanocomposites: A Comparative Study Regarding Different Chemical Syntheses Procedures and Their Antibacterial Effect

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