Authors :
Najwa Obaid; Niyazi A. S. Al–Areqi
Volume/Issue :
2nd ICTSA-2022
Google Scholar :
https://bit.ly/3TmGbDi
Scribd :
https://bit.ly/42Fsbsx
DOI :
https://doi.org/10.5281/zenodo.7773561
Abstract :
A layered Aurivillius–perovskite type
BIMNVOX compound with a general formula,
Bi2Mn
was developed as an effective
photocatalyst for degradation of organic dyes. A series of
BIMNVOX.x catalysts in the composition range
0.20 were successfully prepared using the standard solid–
state reaction and characterized using X–ray diffraction
(XRD), differential thermal analysis (DTA), UV–vis
spectrophotometry and adsorption measurements. Then,
the photocatalytic activities of synthesized catalysts were
investigated for the first time through the
photodegradation of crystal violet, CV dye in aqueous
solution under visible light irradiation. Adsorption
efficiency and photocatalytic activity of BIMNVOX
catalysts were correlated well with the variation in phase
crystal structures stabilized at room temperature as a
function of composition. The stabilized β–BIMNVOX
phase in the orthorhombic crystal system, space group
Acam exhibited the best photocatalytic performance,
though broadening band– gap energy. This can be
attributed to their higher specific surface area, higher
oxygen –vacancy concentration in the perovskite
vanadate layers. In addition, the possible photocatalytic
degradation mechanism of aqueous CV dye was clearly
proposed.
A layered Aurivillius–perovskite type
BIMNVOX compound with a general formula,
Bi2Mn
was developed as an effective
photocatalyst for degradation of organic dyes. A series of
BIMNVOX.x catalysts in the composition range
0.20 were successfully prepared using the standard solid–
state reaction and characterized using X–ray diffraction
(XRD), differential thermal analysis (DTA), UV–vis
spectrophotometry and adsorption measurements. Then,
the photocatalytic activities of synthesized catalysts were
investigated for the first time through the
photodegradation of crystal violet, CV dye in aqueous
solution under visible light irradiation. Adsorption
efficiency and photocatalytic activity of BIMNVOX
catalysts were correlated well with the variation in phase
crystal structures stabilized at room temperature as a
function of composition. The stabilized β–BIMNVOX
phase in the orthorhombic crystal system, space group
Acam exhibited the best photocatalytic performance,
though broadening band– gap energy. This can be
attributed to their higher specific surface area, higher
oxygen –vacancy concentration in the perovskite
vanadate layers. In addition, the possible photocatalytic
degradation mechanism of aqueous CV dye was clearly
proposed.
