Comparative Studies on Synthesis, Characterization and Photocatalytic Activity of Ag Doped ZnO Nanoparticles

Abstract

In this work, silver (Ag) doped zinc oxide (ZnO) nanoparticles were synthesized using zinc chloride, zinc nitrate, and zinc acetate precursors with (0 to 10) wt % Ag doping by a simple reflux chemical method. The nanoparticles were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet visible spectroscopy, and photoluminescence spectroscopy. The nanoparticles are studied as a photocatalyst for visible light driven annihilation of methylene blue and rose bengal dyes. The 5 wt % Ag doped ZnO displayed optimum photocatalytic activity toward methylene blue and rose bengal dye degradation at the rate of 13 × 10 −2 min −1 and 10 × 10 −2 min −1 , respectively. Here we report antifungal activity for the first time using Ag doped ZnO nanoparticles against Bipolaris sorokiniana, displaying 45% efficiency for 7 wt % Ag doped ZnO.

Visible-Light-Driven Mentha spicata L.-Mediated Ag-Doped Bi2Zr2O7 Nanocomposite for Enhanced Degradation of Organic Pollutants, Electrochemical Sensing, and Antibacterial Applications

“…The BZOP nanomaterial exhibited FTIR bands at 433, 916, 1123, 1562, and 3530 cm –1 . The peak at 400–600 cm –1 corresponds to Bi–O and Zn–O vibrational bands, and the peaks at 916 and 1123 cm –1 revealed the C–H vinyl and bending vibrations, respectively. , The FTIR peaks at 460 cm –1 indicated the Zr–O–Zr bond (deformation mode), with the peaks at 1002 and 1109 cm –1 corresponding to the stretching vibrations of the terminal Zr–O bond. − The FTIR bands at 1562 and 3530 cm –1 matched the –OH stretching and bending present in the adsorbed water molecule (Figure a). The peaks at 3450, 1685, and 1505 cm –1 concern the hydroxyl, carbonyl, and double-bonded (CC) carbons of aromatic compounds present in the pudina leaf extract.…”

“…The doping of Ag nanoparticles on ZnO enhanced the photocatalytic process by foiling the electron−hole pair recombination, and the process exhibited an excellent antibacterial potential even after the cutoff of the UV light. 15,16 On the global market, pudina has played a remarkable role as a medicine, diaphoretic, antiseptic, stomachic, antispasmodic, food flavoring, and spicing agent. 17,18 It is also used as medicine for cold, fever, flu, motion sickness, food poisoning, poor digestion, rheumatism, hiccups, stings, earaches, flatulence, sinusitis, and so forth.…”

Silver Nanoparticles Embedded ZnO Foam and its Surface Photoinduced Charge Transfer Behaviors

“…Wagh and co-workers prepared AgÀ ZnO NPs by a simple reflux chemical method. [13] The aggregation of Ag led to a significant increase in absorbance over the entire visible region at higher concentrations of Ag. The 5 wt % Ag doped ZnO displayed optimum photocatalytic activity.…”

“…ZnO NPs with 4 wt % Ag doping showed a maximum degradation of ~95 % in 1.5 h of malachite green dye under visible light. Wagh and co‐workers prepared Ag−ZnO NPs by a simple reflux chemical method [13] . The aggregation of Ag led to a significant increase in absorbance over the entire visible region at higher concentrations of Ag.…”

“…To overcome limitation and make ZnO useful for solar energy applications, various strategies have been developed to modify its optical and photoinduced charge transfer properties, such as doping, [7] heterojunction, [8] noble metal deposition [9,10] . Silver nanoparticles (AgNPs) have shown great potential for enhancing the photocatalytic activity of ZnO due to its high electrical conductivity and non‐toxic [11–15] . Recently, Vikal and co‐workers fabricated functionalized Ag/ZnO NPs via a hydrothermal method for wastewater treatment [12] .…”