TY - EJOUR
AU - Rostami-Vartooni, Akbar
AU - Moradi-Saadatmand, Abolfazl
AU - Bagherzadeh, Mojtaba
AU - Mahdavi, Mohammad
PY - 2024
DA - February
TI - Green synthesis of Ag/Fe3O4/ZrO2 nanocomposite using aqueous Centaurea cyanus flower extract and its catalytic application for reduction of organic pollutants
T2 - Iranian Journal of Catalysis
VL - 9
L1 - https://oiccpress.com/iranian-journal-of-catalysis/article/green-synthesis-of-ag-fe3o4-zro2-nanocomposite-using-aqueous-centaurea-cyanus-flower-extract-and-its-catalytic-application-for-reduction-of-organic-pollutants/
N2 - In this work, at first, nano ZrO2 and Fe3O4/ZrO2 nanocomposite were prepared by sol-gel and co-precipitation methods, respectively. Then, Ag nanoparticles (Ag NPs) were mixed with themin environmentally friendly and mild conditions using C. cyanus flower extract as a reducing and stabilizing agent. The synthesized nanocomposites were characterized by FT-IR, XRD, FE-SEM, EDS, and VSM techniques. The experimental results confirmed formation of the Ag nanoparticles with the 30-90 nm diameter on the surface of supports at room temperature within a few minutes. After that, the catalytic activity of the prepared nanocomposites in reduction of 4-nitrophenol (4-NP) and methyl orange (MO) have been studied and our results showed that they have following sequence: Ag/ZrO2 > Ag/Fe3O4/ZrO2 > ZrO2 > ZrO2 (550 °C) > Fe3O4/ZrO2. Finally, the magnetically recoverable Ag/Fe3O4/ZrO2 nanocomposite could be reused three times without a considerable decrease in its catalytic activity. Observed results were presented here and the probable catalytic mechanism was discussed.
IS - 1
PB - OICC Press
KW - Ag Nanoparticles, Centaurea cyanus, Zirconia, Magnetic support, Green synthesis. Organic pollutant 
EN -