Effect of capping methods on the morphology of silver nanoparticles: study on the media-induced release of silver from the nanocomposite β-cyclodextrin/alginate

Abstract

Novel multi-functional nanocomposites were fabricated from polysaccharides, alginate (Alg) and β-cyclodextrin (β-CD) via the ionotropic gelation mechanism.

Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity

“…Our recent work has demonstrated the successful synthesis of AgNPs using a two-step process involving loading and reduction, resulting in nanocomposites composed of alginate and cyclodextrins [ 36 , 38 ]. In the first step, silver ions were loaded onto the nanocomposite [ 37 , 39 ], followed by reduction using plant extract [ 36 , 38 ]. In the present work, we have developed an in situ synthesis method for AgNPs using an alginate composite with lactose as reducing sugar.…”

“…For RhB degradation, the calculated values at 1.0 μg/mL, 2.0 μg/mL, and 3.0 μg/mL of AgNPs@Lac/Alg are 6.41 × 10 −3 s −1 ( R 2 = 0.96), 21.05 × 10 −3 s −1 ( R 2 = 0.98), and 21.98 × 10 −3 s −1 ( R 2 = 0.89), respectively. The rate constants of AgNPs@Lac/Alg are found to be higher than the values of metal NPs loaded on alginate-based nanocomposites used in the solid state [ 36 – 38 ]. These results suggest that amount and carrier property of the metal NPs play a significant role in the catalytic degradation of organic dyes.…”

“…This method allows for the loading of metallic ions onto the nanocomposite, followed by their reduction to nanoparticles [ 36 – 37 ]. The nanocomposite matrix can release silver in appropriate environments, exhibiting pH-dependent antibacterial activity [ 38 ].…”

Two-dimensional noble metal-based intermetallics for electrocatalysis

“…As Bi atoms diffused, the horizontal dimensions of the NSs decreased, and the edges of NSs changed from angular to rounded, accompanied by an increase in edge thickness [71] . Similarly, Guo et al [72] reported the seed-mediated growth of Pd-based (Pd-M, M = Pb, Sn, and Cd) ultrathin, porous IMC NSs (UPINs). Pd NS seeds were initially synthesized using the CO-assisted method (Fig.…”

Synthetic Application of Cyclodextrins in Combination with Metal Ions, Complexes, and Metal Particles

“…[56] The Nguyen group has made three additional βCD-alginate samples differing in the capping methods that is in the order of mixing the components. [191] The best catalyst was prepared by adding an aqueous solution of AgNO 3 and βCD to calcium alginate hydrogel followed by forming Ag 0 particles (2-22 nm) upon treatment with Lactuca indica extract (85°C, 180 min). TEM, SEM, and EDAX were used for characterization.…”