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Villegas-Fuentes, A.; Rosillo-de la Torre, A.; Vilchis-Nestor, A.R.; Luque, P.A.
Chemosphere (Oxford), 10/2023, Letnik: 339Journal Article
Peppers are fruits that grow on plants of the genus Capsicum and are popular for their use in gastronomy as a condiment and for their anti-inflammatory and anti-cancer properties due to their phytocompounds such as flavonoids, polyphenols, or alkaloids. Semiconductor zinc oxide (ZnO) nanoparticles (NPs) were synthesized using a green approach employing natural aqueous extracts of several varieties of peppers (jalapeño, morita, and ghost). The obtained NPs were characterized by different techniques, and their photocatalytic and antibacterial activity was studied. The signal at 620 cm−1 in the FTIR spectra belonging to the Zn–O bond, the appearance of the main peaks of a hexagonal wurtzite structure in the XRD pattern, and the characteristic signals in the UV–Vis spectra confirm the correct formation of ZnO NPs. The photocatalytic activity was analyzed against Methylene Blue (MB), Rhodamine B (RB), and Methyl Orange (MO) under UV and sunlight. All syntheses were able to degrade more than 93% of the pollutants under UV light. Antibacterial assays were performed against gram-positive and gram-negative bacteria. All syntheses exhibited antibacterial activity against all bacteria and maximum growth inhibition against Bacillus subtilis. The prominent results demonstrate that natural aqueous extracts obtained from peppers can be used to synthesize ZnO NPs with photocatalytic and biomedical applications. Display omitted •ZnO NPs were synthesized using natural extracts obtained from different peppers.•The optical properties of the NPs are directly linked to the variety of pepper used.•NPs eliminated more than 93% of organic dyes under UV light.•Antibacterial assay showed prominent growth inhibition against B. subtilis.
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