Low-cost, simple and eco-friendly biosynthesis of CeO2-NPs using extract of Pelargonium hortorum for the photocatalytic and antioxidant applications

Autor: Ali Ganbarianzade Mahabadi, Abbas Mirzakhani, Saied Chavoshi, Shahab Khaghani, Amir Azizi
Rok vydání: 2021
Předmět:
Popis: In this paper, firstly the phytochemical composition in the aqueous extract of Pelargonium, growing wildly in the center of Iran, was studied. Folin–Ciocalteu and Aluminum chloride methods and the GC/MS technique were used to determine the total phenolic, flavonoid contents, and volatile constituents in the extract, respectively. The amounts of the total phenolic and flavonoid contents in the extract were found to be 136.5 mg GA/g and 63.9 mg RU/g, respectively. Twenty-one compounds, representing 15 (about 80.0%) of the total volatile constituents were identified. The main components of the volatile constituent were α-pinene (25.28%) and fenchyl acetate (20.63%). Secondly, a fast, simple, and eco-friendly biosynthesis of cerium oxide nanoparticles (CeO2-NPs) were investigated using the extract of Pelargonium as a natural reducing and stabilizing agent. Several advance techniques such as Ultraviolet-Visible (UV–Vis) spectroscopy, X-ray diffraction (XRD), Scanning electron microcopy (FESEM), Dynamic light scattering (DLS), and Brunaure Emmett-Teller (BET) were used for the analysis and characterization of the synthesized nanoparticles. The results of the characterization analysis showed that the prepared nanoparticles were spherical in shape, with an average size of 28 nm and zeta potential of -25.8 mV, and had 33.84 m2/g BET surface area, 9.31 nm mane diameter pore, and a total pore volume of 0.078 cm3/g. Finally, the practical applications including the antioxidant and photocatalyst activity of the biosynthesized CeO2-NPs were evaluated. An analysis of antioxidant and catalytic activities showed that the biosynthesized CeO2-NPs have a good ability of scavenging of 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical with the IC50 value of 42.7 µg/mL and also good reduction ability of hexavalent chromium {Cr(VI)} ions with a reduction efficiency of 94% in an aqueous solution containing 10 mg/L of Cr(VI) of ion with natural pH of 5.5 and CeO2-NPs dose of 200 mg/L during 60 min.
Databáze: OpenAIRE