Synthesis and characterization of calcium and magnesium based oxides and titanates for photocatalytic degradation of rhodamine B: a comparative study.

Autor: Vijayakumar N; Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India., Venkatraman SK; Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India., Imthiaz S; Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India., Drweesh EA; Department of Inorganic Chemistry, National Research Centre, 33 El Bohouth St. (Former EltahrirSt.), Dokki, Giza, 12622, Egypt., Elnagar MM; Department of Inorganic Chemistry, National Research Centre, 33 El Bohouth St. (Former EltahrirSt.), Dokki, Giza, 12622, Egypt., Koppala S; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, China., Swamiappan S; Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India. ssasikumar@vit.ac.in.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Mar 03; Vol. 13 (1), pp. 3615. Date of Electronic Publication: 2023 Mar 03.
DOI: 10.1038/s41598-023-30013-3
Abstrakt: The current investigation deals with the simple and ecological synthesis of CaO, MgO, CaTiO 3, and MgTiO 3 for the photocatalytic dilapidation of rhodamine B dye. CaO was procured from chicken eggshell waste by calcination process, while MgO was produced by solution combustion method using urea as a fuel source. Furthermore, CaTiO 3 and MgTiO 3 were synthesized through an easy and simple solid-state method by mixing thoroughly the synthesized CaO or MgO with TiO 2 before calcination at 900 °C. XRD and EDX investigations confirmed the phase formation of the materials. Moreover, FTIR spectra revealed the existence of Ca-Ti-O, Mg-Ti-O, and Ti-O which resembles the chemical composition of the proposed materials. SEM micrographs revealed that the surface of CaTiO 3 is rougher with relatively dispersed particles compared to MgTiO 3 , reflecting a higher surface area of CaTiO 3 . Diffuse reflectance spectroscopy investigations indicated that the synthesized materials can act as photocatalysts under UV illumination. Accordingly, CaO and CaTiO 3 effectively degraded rhodamine B dye within 120 min with a photodegradation activity of 63% and 72%, respectively. In contrast, the photocatalytic degradation activity of MgO and MgTiO 3 was much lower, since only 21.39 and 29.44% of the dye were degraded, respectively after 120 min of irradiation. Furtheremore, the photocatalytic activity of the mixture from both Ca and Mg titanates was 64.63%. These findings might be valuable for designing potential and affordable photocatalysts for wastewater purification.
(© 2023. The Author(s).)
Databáze: MEDLINE
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