Open AccessFabrication and characterization of amidoxime-functionalized silica decorated with copper: a catalytic assembly for rapid reduction of dyes
Author(s) -
Ijaz A. Khan,
Muhammad Hassan,
Hazrat Hussain,
Syed Mujtaba Shah,
Tariq Yasin
Publication year - 2021
Publication title -
turkish journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 46
eISSN - 1303-6130
pISSN - 1300-0527
DOI - 10.3906/kim-2007-49
Subject(s) - catalysis , chemistry , fourier transform infrared spectroscopy , copper , methylene blue , scanning electron microscope , selective catalytic reduction , nuclear chemistry , aqueous solution , spectroscopy , reaction rate constant , infrared spectroscopy , kinetics , inorganic chemistry , chemical engineering , organic chemistry , materials science , physics , photocatalysis , quantum mechanics , engineering , composite material
In this study, amidoxime-functionalized silica decorated with copper (AFS-Cu) was fabricated and tested for its catalytic application. Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction were employed to characterize its structure and morphology. The application of AFS-Cu as a catalyst for the catalytic reduction of methylene blue (MB) in aqueous media using NaBH 4 as reductant was evaluated. The ability to reuse as well as the effect of catalyst dose and pH of solution on the catalytic activity was investigated. The reduction of MB followed pseudo-first-order kinetics and the rate constant (k) was 0.6224 min -1 . AFS-Cu was found to be a highly effective catalyst for MB reduction reaction and can be easily recovered and reused several times with no appreciable loss of catalytic activity.