Journal
IET NANOBIOTECHNOLOGY
Volume 13, Issue 4, Pages 407-415Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-nbt.2018.5089
Keywords
silver; X-ray chemical analysis; X-ray diffraction; nanocomposites; reduction (chemical); nanofabrication; nanoparticles; transmission electron microscopy; catalysts; Fourier transform infrared spectra; iron compounds; field emission scanning electron microscopy; zeolites; magnetometry; particle size; Ag-Fe3O4; temperature 293 K to 298 K; green synthesis; catalyst material; 4-nitrophenol reduction; methyl orange reduction; particle size; vibrating sample magnetometry; Brunauer-Emmett-Teller method; field-emission scanning electron microscopy; X-ray diffraction; FT-IR spectroscopy; silver nanoparticles; Juglans regia L; leaf extract; organic pollutant reduction; magnetically recoverable nanocomposites; energy-dispersive spectroscopy
Funding
- University of Qom
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In this work, an Fe3O4/HZSM-5 nanocomposite was synthesised in the presence of Juglans regia L. leaf extract. Then, silver nanoparticles (Ag NPs) were immobilised on the surface of prepared magnetically recoverable HZSM-5 using selected extract for reduction of Ag+ ions to Ag NPs and their stabilisation on the surface of the nanocomposite. The reduction of Ag+ ions occurs at room temperature within a few minutes. Characterisation of the prepared catalysts has been carried out using fourier transform infrared (FT-IR), X-ray diffraction, field-emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy, Brunauer-Emmett-Teller method, and a vibrating sample magnetometer. According to the FESEM images of the nanocomposites, the average size of the Ag NPs on the Fe3O4/HZSM-5 surface was >70 nm. The Ag/Fe3O4/HZSM-5 nanocomposite was a highly active catalyst for the reduction of methyl orange and 4-nitrophenol in aqueous medium. The utilisation of recycled catalyst for three times in the reduction process does not decrease its activity.
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