1 research outputs found
Mesoporous Cu-Doped Manganese Oxide Nano Straws for Photocatalytic Degradation of Hazardous Alizarin Red Dye
The present work reports the photocatalytic degradation
of alizarin
red (AR) using Cu-doped manganese oxide (MH16–MH20) nanomaterials as catalysts under UV light irradiation. Cu-doped
manganese oxides were synthesized by a very facile hydrothermal approach
and characterized by energy dispersive X-ray spectroscopy, powder
X-ray diffraction, scanning electron microscopy, Brunauer–Emmett–Teller
analysis, UV–vis spectroscopy, and photoluminescence techniques.
The structural, morphological, and optical characterization revealed
that the synthesized compounds are nanoparticles (38.20–54.10
nm), grown in high mesoporous density (constant C > 100), possessing a tetragonal phase, and exhibiting 2.98–3.02
eV band gap energies. Synthesized materials were utilized for photocatalytic
AR dye degradation under UV light which was monitored by UV–visible
spectroscopy and % AR degradation was calculated at various time intervals
from absorption spectra. More than 60% AR degradation at various time
intervals was obtained for MH16–MH20 indicating
their good catalytic efficiencies for AR removal. However, MH20 was found to be the most efficient catalyst showing more than 84%
degradation, hence MH20 was used to investigate the effect
of various catalytic doses, AR concentrations, and pH of the medium
on degradation. More than 50% AR degradation was obtained for all
studied parameters with MH20 whereas the pseudo-first-order
kinetic model was found to be the best-fitted kinetic model for AR
degradation with k = 0.0015 and R2 = 0.99 indicating a significant correlation between
experimental data