Incorporation of silver nanoparticles on Cu‐BTC metal–organic framework under the influence of reaction conditions and investigation of their antibacterial activity

Abstract

In this work, silver nanoparticles were loaded on Cu‐BTC metal–organic framework (MOF) by chemical reduction method in the presence of NaBH4. Characterization of structures was performed by FT‐IR, XRD, SEM, TEM, ICP‐OES, N2 adsorption–desorption isotherm, and TGA techniques. Changes in the reaction conditions, especially the used solvent, in the synthesis of the compounds were investigated, and it was found that the amount of silver loaded, size, distribution, and morphology of the particles depended on it. Silver loading values of 1.76%–2% were calculated. The sample synthesized in a mixture of water and methanol (AC2) showed the highest amount of load with uniform and narrow distribution of about 20 nm for silver nanoparticles. The compounds' bactericidal potency was tested by agar well diffusion and broth dilution methods against Gram‐negative and Gram‐positive microorganisms. Silver loading amount, type of metal, solubility, particle size, and porosity were the factors influencing antibacterial activity. The physicochemical properties created in AC2 led to its best antibacterial performance.

Prolonged release of silver and iodine from ZIF-7 carrier with great antibacterial activity

“…Therefore, Ag@ZIF-7 can compete with silver-containing copper frameworks in the antibacterial properties. 65 In another study that was carried out on the loading of silver nanoparticles on titanium oxide (TiO 2 ) and zinc oxide (ZnO), it was shown that the maximum ZOI of synthesized materials is lower than the ZOI reported in this study, which indicates that Ag@ZIF-7 can serve as a highly suitable carrier for silver nanoparticles capable of inhibiting bacteria through the release of both Zn 2+ and Ag + ions. In addition, in cases such as loading on zinc oxide and titanium oxide nanoparticles, the presence or absence of LED irradiation can impact the final result and can affect the amount of antibacterial activity of the products; on the other hand it does not apply to ZIF-7, and Ag@ZIF-7 shows good antibacterial properties under both conditions.…”

“…This characteristic of metal–organic frameworks allows them to have a regulated release as antibacterial agent reservoirs or as carriers. 65 As seen clearly from the graphs, the first concentration of released Ag + ions is higher than that of Zn 2+ ions, even though the sampling was done at the same time and after the same period. The reason is that the released Zn 2+ ions are the result of the destruction of the framework, while the released Ag + ions can be attributed to the surface-adsorbed silver nanoparticles.…”

Electronic-Control Friction Behavior of Porous Metal–Organic Framework@Ag Nanocrystals as Self-Repairing Lubricant Additive

“…The sizes of NPs and mesopores increased with the addition of 20 wt % Ag NPs, and some aggregates attached onto the surface of the Cu-BTC. This finding indicated that adding Ag NPs can affect the structure and morphology of Cu-BTC Figure f reveals that the Ag element marked with purple color was homogeneously dispersed throughout the matrix of Cu-BTC nanocrystals, as for the nucleation effect of Ag NPs.…”

“…This finding indicated that adding Ag NPs can affect the structure and morphology of Cu-BTC. 30 Figure 2f reveals that the Ag element marked with purple color was homogeneously dispersed throughout the matrix of Cu-BTC nanocrystals, as for the nucleation effect of Ag NPs. With increased content of Ag NPs to 40 wt %, the pores enlarged and some macropores produced were 200 nm in size (Figure 2g).…”

Coordination Compounds of Cu, Zn, and Ni with Dicarboxylic Acids and N Donor Ligands, and Their Biological Activity: A Review

“…Very important compounds formed by carboxylic acids are metal–organic frameworks (MOFs). These were mostly applied for their physical properties but they were also studied as antibacterial agents or drug transporters [ 9 , 10 , 11 , 12 , 13 , 14 ]. Zinc carboxylates can be utilized as precursors for zinc oxide nanoparticles and are studied for their biological activities [ 15 , 16 , 17 ].…”