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Green synthesis of Fe 3 O 4 @SiO 2 ‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water
Author(s) -
Mohammadi Pourya,
Sheibani Hassan
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4249
Subject(s) - catalysis , methyl orange , chemistry , methylene blue , nuclear chemistry , inductively coupled plasma , transmission electron microscopy , fourier transform infrared spectroscopy , selective catalytic reduction , photocatalysis , analytical chemistry (journal) , inductively coupled plasma atomic emission spectroscopy , scanning electron microscope , dynamic light scattering , nanoparticle , chemical engineering , nanotechnology , organic chemistry , materials science , physics , plasma , quantum mechanics , engineering , composite material
This paper reports the green and in situ preparation of Fe 3 O 4 @SiO 2 ‐Ag magnetic nanocatalyst synthesized using safflower ( Carthamus tinctorius L.) flower extract without the addition of any stabilizers or surfactants. The catalytic performance of the resulting nanocatalyst was examined for the reduction of 4‐nitrophenol (4‐NP), methylene blue (MB) and methyl orange (MO) in an environment‐friendly medium at room temperature. The main factors such as pH, temperature and amount of catalyst influencing the nanocatalyst performance were studied. The apparent rate constants for 4‐NP, MO and MB reduction were calculated, being 0.756 min −1 , 0.064 s −1 and 0.09 s −1 , respectively. The catalyst was recovered using an external magnet and reused several times with negligible loss of catalytic activity. The as‐synthesized nanoparticles were characterized using powder X‐ray diffraction, transmission electron microscopy, UV–visible, Fourier transform infrared and inductively coupled plasma atomic emission spectroscopies, dynamic light scattering and vibrating sample magnetometry.