Synthesis of Silver Nanoparticles Templated by TEMPO-Mediated Oxidized Bacterial Cellulose Nanofibers

Abstract

We have prepared silver nanoparticles on the surface of bacterial cellulose (BC) nanofibers. The synthesis of silver nanoparticles incorporates 2,2,6,6-tetramethylpiperidine-1-oxyradical (TEMPO)-mediated oxidation to introduce carboxylate groups on the surface of BC nanofibers. An ion exchange of the sodium to the silver salt was performed in AgNO(3) solution, followed by thermal reduction. By using oxidized BC nanofibers as a reaction template, we have prepared stable silver nanoparticles with a narrow size distribution and high density through strong ion interactions between host carboxylate groups and guest silver cations, which have been investigated by scanning electron microscopy, UV-visible spectroscopy, and a small-angle X-ray scattering method.

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

“…It indicated that TEMPO was not as effective as APS on cellulose oxidation. Moreover, CNCs from TEMPO oxidation are highly carboxylated [114,115], which provides the opportunity for functionalization [116,117].…”

Bacterial cellulose in the field of wound healing and regenerative medicine of skin: recent trends and future prospectives

“…Few solutions were proposed for that phenomenon, which are controlled deposition of metal particles through hybridization using nanoporous materials serving as templates, which preserve the well-defined spatial distribution [87]. The shape of bacterial cellulose may ease the incorporation of nanoparticles of metals [88]. Few studies were done to determine such possibility like impregnation the bacterial cellulose with silver nanoparticles by triethanolamine (TEA) [89]; NaBH4 and UV radiation [64]; moreover by application of hydrazine, hydroxyl amine or ascorbic acid [90] as well as by self-polymerized polydopamine [91] and TEMPO-mediated oxidized BC followed by thermal reduction [88].…”

Functionalization of Nanofibrillated Cellulose with Silver Nanoclusters: Fluorescence and Antibacterial Activity

“…Additionally it is well known that silver is strongly attracted by cellulose and this has been widely used to synthesize large and plasmonic silver nanoparticles. [50,[58][59][60] In this regard, the formation of the composite NFC/AgNC could hypothetically be due to a transfer of AgNC from PMAA chains to cellulose nanofibers. However, this hypothesis is unlikely because the transfer of AgNC reported in literature is typically accompanied with a large shift in the optical bands, whereas in the present case, the shift observed in the emission peak of AgNC when mixed with NFC dispersions is small (not shown).…”