A Green Approach for the Synthesis of Silver Nanoparticles Using Ultrasonic Radiation’s Times in Sodium Alginate Media: Characterization and Antibacterial Evaluation

Abstract

The synthesis of silver nanoparticles (Ag-NPs) was achieved by a simple green chemistry procedure using sodium alginate (Na-Alg) under ultrasonic radiation as a stabilizer and physical reducing agent. The effect of radiation time on the synthesis of Ag-NPs was carried out at room temperature until 720 min. The successful formation of Ag-NPs has been confirmed by UV-Vis, XRD, TEM, FESEM-EDX, zeta potential, and FT-IR analyses. The surface plasmon resonance band appeared at the range of 452–465 nm that is an evidence of formation of Ag-NPs. The XRD study showed that the particles are crystalline structure in nature, with a face-centered cubic (fcc) structure. The TEM study showed the Ag-NPs have average diameters of around 20.16–22.38 nm with spherical shape. The FESEM-EDX analysis confirmed the spherical shape of Ag-NPs on the surface of Alg and the element of Ag with the high purity. The zeta potential showed high stability of Alg/Ag-NPs especially after 720 min irradiation with value of −67.56 mV. The FT-IR spectrum confirmed that the Ag-NPs have been capped by the Alg with van der Waals interaction. The Alg/Ag-NPs showed the antibacterial activity against Gram-positive and Gram-negative bacteria. These suggest that Ag-NPs can be employed as an effective bacteria inhibitor and can be applied in medical field.

Solution printable multifunctional polymer-based composites for smart electromagnetic interference shielding with tunable frequency and on–off selectivities

“…In the case of Ag@BN particles, new peaks at 38° (111), 44° (200), 64° (220), and 77° (311) (JCPDS No. 04-0783) appeared, which are typical features of face-centered cubic silver [22].…”

Properties of Haemostatic Powders Based on Dispersed Silica, Sodium Alginate and Silver Nanoparticles

“…Тому інтенсивність смуги ППР за всіх однакових умов і концентрацій для НЧ, відновлених АН, менша, ніж така для НЧ, відновлених боргідридом натрію. Слабка відновлювальна здатність АН, порівняно з NaBH 4 , приводить до того, що в присутності альгінату натрію утворюються НЧ срібла з широким розподілом за розміром [12,13]. На рисунку 3, а наведено спектри НЧ срібла у водному розчині АН (8,5% мас.…”

Radiation Induced Silver Nanoparticles in Ionically Crosslinked Alginate Beads for Efficient Catalytic Degradation of Basic Dye

“…Synthesized metal nanoparticles are carried out by various chemical, physical, and biological methods, such as pyrolysis [5], chemical vapor deposition and sol-gel [6]; that is, most of them use toxic reagent and are expensive. Therefore, high efforts in the synthesis of noble metal nanoparticles using environmentally friendly methods are required.…”