Nuclear chemistry

Catalysis

Engineering

Nanoparticle

Methyl orange

Thermogravimetric analysis

Biology

Identification (biology)

Materials science

Botany

Chemical engineering

Combinatorial chemistry

Nanotechnology

Organic chemistry

Bimetallic strip

X-ray photoelectron spectroscopy

Characterization (materials science)

Aqueous solution

Composite material

Chemistry

Scanning electron microscope

Fourier transform infrared spectroscopy

Photocatalysis

Biomolecule

Chemical Engineering Journal

Both Fe nanoparticles (Fe NPs) and bimetallic Fe/Ni nanoparticles (Fe/Ni NPs) were synthesized using eucalyptus leaf extracts. More than eight major compounds in eucalyptus leaf extracts, which may serve as reducing and capping agents, were identified using Gas Chromatography-Mass Spectrometer (GC–MS). The obtained Fe NPs and Fe/Ni NPs were characterized using Fourier Translation Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TG), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS). The results demonstrated that: (1) the presence of Fe in Fe NPs, and Fe and Ni in Fe/Ni NPs; (2) the coating organic compounds may be responsible for the capping and efficient stabilization of Fe and Fe/Ni NPs. Fe NPs and Fe/Ni NPs were then used to degrade methyl orange (MO) in aqueous solution. Only 29.2% of MO was removed from aqueous solution using Fe NPs, while 99.6% of MO was removed using Fe/Ni NPs. Furthermore the removal of MO using Fe NPs and Fe/Ni NPs followed pseudo-first-order kinetics.

One-step green synthesis of bimetallic Fe/Ni nanoparticles by eucalyptus leaf extract: Biomolecules identification, characterization and catalytic activity