A Novel Visible– Light Driven Photocatalyst: Ethylene Glycol–Citrate Sol–Gel Synthesis, Microwave–Assisted Calcination, and Photocatalytic Efficiency
American Journal of Physical Chemistry
Volume 3, Issue 6, December 2014, Pages: 102-108
Received: Nov. 29, 2014; Accepted: Dec. 7, 2014; Published: Dec. 18, 2014
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Authors
Hakim Qaid Naji Museed Alarique, Department of Chemistry, Faculty of Education, Taiz University, Taiz, Yemen
Elyas Sadeq Al-Aghbari, Department of Chemistry, Faculty of Applied Science, Taiz University, Taiz, Yemen
Niyazi Abdulmawla Sallam Al–Areqi, Department of Chemistry, Faculty of Applied Science, Taiz University, Taiz, Yemen
Ahlam Al–Alas, Department of Chemistry, Faculty of Applied Science, Taiz University, Taiz, Yemen
Khalid Ahmed Saeed Ghaleb, Department of Chemistry, Faculty of Applied Science, Taiz University, Taiz, Yemen
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Abstract
A novel visible– light driven photocatalyst, BIMNVOX.x was synthesized by ethylene glycol–citrate sol–gel route and microwave- assisted calcination. The phocatalyst was characterized structurally by X–ray powder diffraction (XRPD) and simultaneous thermogravimetric–differential thermal analysis (TG–DTA). Its optical and surface properties were determined by means of UV–vis absorption spectrophotometry and BET– nitrogen adsorption isotherm measurements, respectively. The photocatalytic efficiency of BIMNVOX.x system was investigated by applying the pseudo first- order kinetic model to the photocatalytic degradation reaction of crystal violet, CV dye in aqueous solution under visible light irradiation. The β (orthorhombic) –BIMNVOX phase, space group Acam exhibited the highest photocatalytic degradability, indicating that the photocatalytic efficiency of BIMNVOX catalyst is essentially enhanced by the increased number of catalyst active sites, irrespective of the kind of phase stabilized and the increasing photoabsorption ability with Mn dopant content. Moreover, the possible photocatalytic degradation mechanism of aqueous CV dye solution under visible light irradiation was also proposed.
Keywords
Photocatalyst, BIMNVOX, Microwave- Assisted Calcination, Crystal Violet, Perovskites
To cite this article
Hakim Qaid Naji Museed Alarique, Elyas Sadeq Al-Aghbari, Niyazi Abdulmawla Sallam Al–Areqi, Ahlam Al–Alas, Khalid Ahmed Saeed Ghaleb, A Novel Visible– Light Driven Photocatalyst: Ethylene Glycol–Citrate Sol–Gel Synthesis, Microwave–Assisted Calcination, and Photocatalytic Efficiency, American Journal of Physical Chemistry. Vol. 3, No. 6, 2014, pp. 102-108. doi: 10.11648/j.ajpc.20140306.13
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