Preparation of Reduced ZnO/Ag Nanocomposites by a Green Microwave‐Assisted Method and Their Applications in Photodegradation of Methylene Blue Dye, and as Antimicrobial and Anticancer Agents

Abstract

In this present study, we report a facile microwave assisted green synthesis of ZnO/Ag nanocomposites (denoted as G‐ZnO/Ag NCs) by employing Tridax procumbens leaf extract as a green solvent for photocatalytic, antimicrobial and cytotoxicity activities. The prepared nanocomposites was characterized by various techniques to study its crystallinity, morphology, structure, chemical composition, optical properties, and so on. The nanocomposites exhibited excellent photocatalytic performance (90.2 %) toward methylene blue degradation when irradiated under visible light (120 min). Furthermore, the G‐ZnO/Ag NCs showed good reusable properties up to four consecutive cycles. In addition, the resultant nanocomposites showed significant antimicrobial activity with the zones of inhibition of 9.85±0.12 and 10.51±0.63 mm against gram positive (Staphylococcus aureus) and 11.98±0.22 and 13.76±0.12 mm against gram‐negative (Escherichia coli), bacteria respectively, as measured using the well diffusion method. Although, the in‐vitro cytotoxicity test showed 39.58 % viability of MCF‐7 cells. In summary, this study suggest that G‐ZnO/Ag NCs as a promising tool for wastewater treatment and nano biomedical applications using low cost and eco‐friendly approach.

Structural and optical properties of silver supported α-Fe2O3nanocomposite fabricated bySaraca asocaleaf extract for the effective photo-degradation of cationic dye Azure B

“…As efficient scavengers for ˙OH, h + , and ˙O 2 − , respectively, isopropyl alcohol (IPA), disodium-EDTA, and para -benzoquinone (BZQ) have been employed to identify the primary active radical species participating in sunlight-driven deterioration process. 42,66 The photocatalytic reaction is observed to be suppressed by all scavengers; however, the scavenging capacity of the species is reduced in the order Na 2 -EDTA > BZQ > IPA. Using the scavengers IPA, BZQ, and Na 2 -EDTA, the percentage photocatalytic degradation of AzB was determined to be 77.8%, 48.4%, and 28%, respectively (Fig.…”

“…This fast recovery is essential for its practical use in the further utilization of photocatalyst. 66…”

Sustainable bioactivity enhancement of ZnO–Ag nanoparticles in antimicrobial, antibiofilm, lung cancer, and photocatalytic applications

“…Many studies have been conducted to prove the cytotoxicity potential of ZnO-Ag and ZnO NPs in reducing cancer progression. [65][66][67] Saranya et al created ZnO and Ag-ZnO NPs and evaluated them against the A549 cancer cell line, and they found that their product has cytotoxic ability over the A549 cell line. 67 Selvan et al utilized green synthesis techniques to generate Ag/ZnO nanocomposites and evaluated their anticancer efficacy on multiple cancer cell lines, including breast (MCF-7 and MDA-MB-231), colon (HCT-15), and lung (A549) cells.…”

“…[65][66][67] Saranya et al created ZnO and Ag-ZnO NPs and evaluated them against the A549 cancer cell line, and they found that their product has cytotoxic ability over the A549 cell line. 67 Selvan et al utilized green synthesis techniques to generate Ag/ZnO nanocomposites and evaluated their anticancer efficacy on multiple cancer cell lines, including breast (MCF-7 and MDA-MB-231), colon (HCT-15), and lung (A549) cells. Using the MTT assay, the researchers found that their product had signicant anticancer potential against all tested cancer cell lines tested.…”

Surface parametric influences on the photocatalytic behaviour of zinc oxide nanoparticles

“…The crystalline nature of the ZnO photocatalyst is reflected in the broadness of a peak, and the absorption band at 2333.83 cm -1 is created by the asymmetric and symmetric stretching mode vibrations of an air-absorbed CO 2 molecule [9]. Also, the wide peak at 3419.97 cm -1 and 1378.07 cm -1 , 1553.14 cm -1 may be due to stretching and bending vibrations of-OH group absorbed from the environment on the surface of the catalyst during FTIR measurement [10].…”