Effects of UV Radiation and pH of Tannic Acid Solution in the Synthesis of Silver Nanoparticles

Abstract

The reductions of silver nitrate by tannic acid at various pH with and without UV radiation at room temperature were done in order to study the effects of UV radiation and pH of tannic acid solution in the synthesis of silver nanoparticles. The results from UV-Visible spectroscopy, dynamic light scattering method and transmission electron microscopy indicated that using UV radiation resulted in silver nanoparticles with smaller particles and narrower size distribution at every pH. The results also revealed that smallest particles without agglomeration were obtained when alkali condition was applied. Therefore, the suitable condition for synthesizing silver nanoparticles in this research was to use UV radiation and tannic acid solution having pH of 8.0.

Green Synthesis of Gold Nanoparticles from Coprinus comatus, Agaricaceae, and the Effect of Ultraviolet Irradiation on Their Characteristics

“…These findings agree with Owaid et al [24], especially for the Cumulation of AuNPs. After one h, the best results were observed about the effect of UV irradiation on sizes of AuNPs, which reached smaller nanoparticles compared with times 2 and 3 h, and this agreed with the results of Watcharaporn et al [37]. In this study, only one h instead of more than three h was best to enhance small sizes of AuNPs but close of sizes of AuNPs without UV irradiation, as shown in Figures 4, 5, and 6.…”

“…As a result of the response of electrons to the high frequencies of ultraviolet waves, the material's electronic structure is destroyed because electrons move from lower energy levels to higher energy levels [41]. Also, the intensity of absorbance showed an increase with UV irradiation compared without the irradiation, as in Figures 8, 9, and 10, and that agreed with Watcharaporn et al [37].…”

Antibacterial activity of silver nanoparticles obtained by co-reduction with sodium citrate and tannic acid

“…The AgNPs modified with TA were proposed as microbicides and for wound healing [26][27][28]. TA was used for the preparation of AgNPs [22,24,[29][30][31][32][33][34]. TA was also used together with sodium citrate to prepare AgNPs [35,36] mainly for catalytic properties [35].…”