Green Synthesis and Stability Evaluation of Ag Nanoparticles Using Bamboo Hemicellulose

Abstract

The unique physico-chemical properties of silver nanoparticles (Ag NPs) have opened up the opportunity for their use in many promising physicochemical and biomedical applications. In this study, an economically feasible approach to green synthesis of silver nanoparticles (Ag NPs) is described using hemicellulose from bamboo. Simultaneously, glucose was used as the reducing agent, and distilled water was used as the reaction medium. UV-vis spectroscopy and transmission electron microscopy were used to investigate the surface plasmon behavior, morphology, and particle size of the Ag NPs. Hemicellulose alone could not reduce Ag + to Ag 0 . The formation rate of the nanoparticles was accelerated when high amounts of glucose were added. Small particle sizes were obtained when high concentrations of hemicellulose were used. The stability of the Ag NPs synthesized using different concentrations of hemicellulose from 0.5 mg/mL to 8.0 mg/mL was also evaluated. Higher initial hemicellulose concentrations produced more stable Ag NPs. The average particle sizes of the NPs after storing for 160 days at 4 °C were still smaller than 10 nm when the initial hemicellulose concentrations were 6.0 and 8.0 mg/mL.

Plant celluloses, hemicelluloses, lignins, and volatile oils for the synthesis of nanoparticles and nanostructured materials

“…The extraction of hemicelluloses from plant sources is extensively applied as a primary step in the preparation of other significant nanoparticles. Using hemicellulose from bamboo as an additive and glucose as a reducing agent, the nanosized silver particles were synthesized 277 , by the addition of hemicellulose at high concentrations resulted in 5 to 20 nm-sized silver particles. Likewise, hemicelluloses are useful as a tumbling agent in nanosized metal (e.g.…”

Adsorption Characteristics of Ag Nanoparticles on Cellulose Nanofibrils with Different Chemical Compositions

“…Both were found to exhibit good reactivity for reducing these metals; however, the metal particles were observed to be reduced by the hemicelluloses aggregated toward larger particles. Pang et al [40] have reported that hemicellulose itself could not convert Ag + to Ag 0 and the formation rate of the nanoparticles increased with the addition of glucose. Oxygen atoms of the hydroxyl and carboxylate groups in hemicellulose contain a lone pair of electrons, enabling them to bind with Ag+ ions, which is subsequently reduced by the hemiacetal groups of glucose.…”

Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

“…Investigating the QTMC concentration effect before the formation of QTMC-AgNPs, the absorbance increased with a small blue shift as the concentration of the QTMC saccharide unit increased (Figure d) due to the higher capping efficiency of silver nanoparticles. This implies that the concentration of QTMC played a significant role in the optical property of the synthesized QTMC-AgNPs …”

“…This implies that the concentration of QTMC played a significant role in the optical property of the synthesized QTMC-AgNPs. 58 Figure 3 shows the ATR-FTIR spectra of CTS, QTMC, and QTMC-AgNPs. To begin, the absence of vibrational frequency at about 1577 cm −1 in the QTMC spectrum, which was induced by N−H bond angular deformation of amino groups on the CTS backbone, is the first evidence of CTS quaternization.…”