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Synthesis and characterization of silver nanoparticles impregnated into bacterial cellulose

2009; Elsevier BV; Volume: 63; Issue: 9-10 Linguagem: Inglês

10.1016/j.matlet.2009.01.007

1873-4979

Luiz Cláudio de Santa Maria, Ana L. C. Santos, Philippe C. Oliveira, Hernane da Silva Barud, Younès Messaddeq, Sidney J. L. Ribeiro,

Nanomaterials for catalytic reactions

This article presents a study about the synthesis of colloidal silver (Ag)/biopolymer where Ag submicron particles were prepared in situ on bacterial cellulose (BC) produced by Gluconacetobacter xylinus. Different reducing agents were compared (hydrazine, hydroxylamine or ascorbic acid) together with the influence of gelatin or polyvinylpyrrolidone (PVP) employed as colloid protectors. Particle size distribution and morphology were investigated by scanning electron microscope (SEM). SEM images show silver nanoparticles (40–100 nm) size range attached on (BC) microfibrils. XRD analyses confirmed the Ag cubic phase deposited on to BC fibrils. The ash contents determined by thermogravimetric analyses have indicated high level of silver loading on the obtained composites.