Biosynthesis of silver nanoparticles through tandem hydrolysis of silver sulfate and cellulose under hydrothermal conditions

Abstract

BACKGROUND Biosynthesis of Ag nanoparticles (AgNPs) utilizing renewable materials and nontoxic chemicals has become highly desirable and is currently receiving tremendous attention. In this study, a facile and cellulose‐based approach was developed to biosynthesize AgNPs through tandem hydrolysis of silver sulfate and cellulose under hydrothermal conditions. RESULTS Well‐defined AgNPs of about 72.0 nm in size were biosynthesized with 0.30 g of cellulose at 200°C for 10 h. The particle sizes of the as‐synthesized AgNPs were positively affected by the reaction temperature and time, but on the contrary were negatively affected by the amount of cellulose employed. The results from Fourier transform infrared spectroscopy showed that the cellulose‐hydrolyzed products (saccharides or aldehydes) were accountable for the bioreduction of the Ag ions, and the C = O (C–O) groups in the aldehydes or saccharides played critical roles in capping the AgNPs. Additionally, in the presence of the as‐synthesized AgNPs, enhanced surface fluorescence of methyl orange was achieved. CONCLUSION A biological and maneuverable strategy was successfully developed for the synthesis of AgNPs by a hydrothermal route through tandem hydrolysis of silver sulfate and cellulose. Thus, this environmentally friendly method is anticipated to be utilized for the biosynthesis of AgNPs and opens up avenues to prepare other metal nanoparticles from metal sulfates. © 2013 Society of Chemical Industry

Silver nanoparticles: Synthesis, medical applications and biosafety

“…There are several alternative silver precursors continuously providing monomers for nucleation, such as silver nitrate 69 , silver ammonia ( ie. Tollens reagent) 72 , silver sulfate 73 , and silver chlorate 74 . Frequently used reducing agents may affect the growth of nuclei, including NaBH4, hydrazine, N, N-dimethylformamide, TSC, ascorbic acid, ethylene glycol, polysaccharides, and formaldehyde.…”

Biosynthesis of Ag–Pd bimetallic alloy nanoparticles through hydrolysis of cellulose triggered by silver sulfate

“…The linear relationship of ln( A t / A 0 ) versus time (where A t and A 0 are the absorbance at 400 nm of 4-nitrophenol at time t and initial concentration ( t = 0), respectively) indicates that, the catalytic reaction follows first-order kinetics, and the rate constant of 0.996 s −1 can be directly obtained from the slope of the straight line. 32 For comparison, the catalytic activity of monometallic AgNPs synthesized previously by our research group 29 was examined using the same model reaction. Nevertheless, the Ag NPs almost showed no catalytic activity.…”

“…It has already been evidenced by our research group that, cellulose can be used as green raw material for fabricating AgNPs, because the cellulose-hydrolyzed products of saccharides or aldehydes can reduce silver ions to corresponding AgNPs. 29 However, there have been no reported communications by far about synthesizing bimetallic alloy NPs with cellulose. In this work, the hydrolysis of cellulose and the bioreduction of the metal ions were originally combined together to prepare Ag–Pd bimetallic alloy NPs.…”

Sugarcane Bagasse Hydrolysis by Metal Ions Mediated Synthesis of Perovskite LaCoO3and the Photocatalytic Performance for Hydrogen from Formaldehyde Solution under Visible Light

“…Recently, there are many reports that metal ions hydrolyze cellulose and other insoluble biomass macromolecules to make them into soluble biomass small molecules to further synthesize silver nanoparticles. , It is known that sugarcane bagasse is mainly composed of hemicellulose, cellulose, and lignin, which can be hydrolyzed, breaking the macromolecule into small molecular units. − The rich functional groups such as carboxyl and hydroxyl could provide binding sites and play a dominant role in complexing and interaction with metal ions, which are beneficial to the synthesis of composite catalysts. , Perovskite oxide LaCoO 3 as a typical photocatalyst has been extensively investigated because of its interesting physicochemical properties. , As reported, the structure and property of this material are closely correlative to the synthesis of precursor and/or dopant, − which could bring lattice defects and tune the amount of oxygen vacancy. A certain number of oxygen vacancies acting as a defect level could narrow the band gap and retard the recombination of photogenerated electrons and holes effectively on the surface of the photocatalyst so as to affect the material properties. − Therefore, how to efficiently synthesize LaCoO 3 with promising performance through constructing oxygen vacancy is taken into consideration.…”

“…Recently, there are many reports that metal ions hydrolyze cellulose and other insoluble biomass macromolecules to make them into soluble biomass small molecules to further synthesize silver nanoparticles. 25,26 It is known that sugarcane bagasse is mainly composed of hemicellulose, cellulose, and lignin, which can be hydrolyzed, breaking the macromolecule into small molecular units. 27−29 The rich functional groups such as carboxyl and hydroxyl could provide binding sites and play a dominant role in complexing and interaction with metal ions, which are beneficial to the synthesis of composite catalysts.…”