The role of tin species in doped iron (III) oxide for photocatalytic degradation of methyl orange dye under UV light.

Autor: Arzaee NA; Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia., Betti N; Materials Engineering Department, University of Technology-Iraq, P.O. Box: 10001, Baghdad, Iraq., Al-Amiery A; Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia., Roslam Wan Isahak WN; Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2023 Jul 07; Vol. 9 (7), pp. e18076. Date of Electronic Publication: 2023 Jul 07 (Print Publication: 2023).
DOI: 10.1016/j.heliyon.2023.e18076
Abstrakt: Iron (III) oxide, a stable semiconductor with versatile applications, was synthesized alongside Sn-doped Fe 2 O 3 (Sn-Fe 2 O 3 ) using the sol-gel technique. Characterization via X-ray diffraction, field-emission scanning electron microscopy, and UV-visible spectroscopy confirmed the presence of α- and γ-Fe2O3 phases in the synthesized powders. Incorporation of the dopant reduced the initial band gap energy of Fe 2 O 3 (2.2 eV) by approximately 0.1 eV. To evaluate photocatalytic performance, Fe 2 O 3 and Sn-Fe 2 O 3 were tested for decolorization efficiency of a methyl orange solution. Results revealed the 5 wt% Sn-doped catalyst as optimal, achieving complete degradation of methyl orange within 120 min under simulated solar light. The addition of small amounts of Sn effectively reduced the Fe 2 O 3 band gap and significantly enhanced photocatalytic performance. Investigation of pH and dye concentration impact on photocatalytic degradation revealed superior activity under acidic conditions compared to alkaline. Furthermore, maintaining a moderate concentration of methyl orange (10 ppm) ensured optimum photocatalytic activity.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2023 The Authors. Published by Elsevier Ltd.)
Databáze: MEDLINE
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