Abstract
This study uses the submerged arc discharge method (SADM) and the concentrated energy of arc to melt silver metal in deionized water (DW) so as to prepare metal fluid with nanoparticles and submicron particles. The process is free from any chemical agent; it is rapid and simple, and rapid and mass production is available (0.5 L/min). Aside from the silver nanoparticle (Ag0), silver ions (Ag+) exist in the colloidal Ag prepared by the system. In the preparation of colloidal Ag, polyvinyl alcohol (PVA) is used as an additive so that the Ag0/Ag+ concentration, arcing rate, peak, and scanning electron microscopic (SEM) images in the cases with and without PVA can be analyzed. The findings show that the Ag0/Ag+ concentration increases with the addition level of PVA, while the nano-Ag and Ag+ electrode arcing rate rises. The UV-Vis absorption peak increases Ag0 absorbance and shifts as the dispersity increases with PVA addition. Lastly, with PVA addition, the proposed method can prepare smaller and more amounts of Ag0 nanoparticles, distributed uniformly. PVA possesses many distinct features such as cladding, dispersion, and stability.
Highlights
Academic Editor: Claudio Pettinari is study uses the submerged arc discharge method (SADM) and the concentrated energy of arc to melt silver metal in deionized water (DW) so as to prepare metal fluid with nanoparticles and submicron particles. e process is free from any chemical agent; it is rapid and simple, and rapid and mass production is available (0.5 L/min)
In the preparation of colloidal Ag, polyvinyl alcohol (PVA) is used as an additive so that the Ag0/Ag+ concentration, arcing rate, peak, and scanning electron microscopic (SEM) images in the cases with and without PVA can be analyzed. e findings show that the Ag0/Ag+ concentration increases with the addition level of PVA, while the nano-Ag and Ag+ electrode arcing rate rises. e UV-Vis absorption peak increases Ag0 absorbance and shifts as the dispersity increases with PVA addition
E silver (99.99% pure) wires with a diameter of 1 mm are used as anode and cathode and are submerged in DW or ethanol. e 200 ml DW is loaded, the positive and negative electrodes are manually xed and aligned, and the discharge parameters are set before discharge. e discharge is nished after a period of time, and the product is taken out. e system framework is shown in Figure 3 [3]
Summary
Kuo-Hsiung Tseng ,1 Chih-Ju Chou, To-Cheng Liu, Der-Chi Tien ,1 Tong-chi Wu, and Leszek Stobinski. With PVA addition, the proposed method can prepare smaller and more amounts of Ag0 nanoparticles, distributed uniformly. PVA (Mw 89,000–98,000, 99+% hydrolyzed, 341584, 9002-89-5, MDL: MFCD00081922) was the eligible polymer since it stands out for its viscoelastic behavior, hydrophilicity, chemical stability [4] and biocompatibility [5]. PVA contains a large amount of –OH functional groups, which can form chelate composed of metal ions [6]. It is a white powdered resin polymer, with features of viscoelasticity, hydrophilicity, chemical stability, and biocompatibility [7,8,9]. There were only two articles about PVA/TiO2 nanocomposite prepared by the ultrasonic irradiation
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