Influence of surfactant on the preparation of silver nanoparticles by polyol method

Abstract

In this study, silver nanoparticles were synthesized from silver nitrate via a polyol method in ambient atmosphere. In our synthesis route, polyvinylpyrrolidone (PVP) is used as both size controller and capping agent, ethylene glycol acts both as solvent and reducing agent. The obtained silver nanoparticles were characterized by ultraviolet-visible spectrophotometry which indicated the formation of nanoparticles. Investigation of Fourier transform infrared spectroscopy clearly demonstrated the coordination between silver nanoparticles and PVP. Transmission electron microscopy (TEM) contributed to the particle size analysis. The surface plasmon resonance peak in absorption spectra of silver colloidal solution showed absorption from 406 to 409 nm. The average size of the resulting silver nanoparticles was below 10 nm with a dependency on the PVP concentration.

Silver micro- and nano-particles obtained using different glycols as reducing agents and measurement of their conductivity

“…The absorbance bands at 447, 441 and 436 nm are attributed to the surface plasmon resonance phenomenon of free electrons in the conduction bands of silver nanoparticle suspensions, respectively synthesized by EG, DEG and PG. These results are in agreement with that of silver nano-particles prepared with PVP chemical reaction by many authors, such as Dung Dang et al [30] and Slistan-Grijalva et al [42]. The morphology and the particle size may play an important role in the absorption spectra of Ag/PVP nano-particles.…”

“…The particle size and particle aggregation decrease with an increasing of PVP/ /AgNO 3 weight ratio [20,21]. Several works focused on the synthesis of micro-and/or nano-sized silver particles using ethylene glycol [17,[22][23][24][25][26][27][28][29][30].…”

Powerful colloidal silver nanoparticles for the prevention of gastrointestinal bacterial infections

“…As a natural antibiotic, silver has been widely applied in water purification, aqueous paints, textiles and antibacterial coatings [12,13]. Special attention has been focused on the production of nanoscale silver particles (silver NPs) because of their exhibited stronger antimicrobial activity and wider range of green applications [14,15]. Silver NPs were found to exhibit very strong antimicrobial activity against a wide range of micro-organisms including bacteria, viruses, fungi as well as microbial strains that are resistant to multiple antibiotics.…”

Enhancing the efficiency of dye-sensitized solar cell by increasing the light trapping and decreasing the electron-hole recombination rate due to Ag@TiO2 core-shell photoanode structure

“…But low amount of PVP can cause agglomeration due to incomplete coverage of Ag NPs. It can be clearly shown from the figures 2(B) and (C) that the higher amount of PVP increases the distance between Ag NPs and results in reducing of aggregation and size of NPs [37,38]. Figure 2(D) presents the SEM image of powder Ag@TiO 2 C-S NPs with 0.5 g of PVP.…”