Journal of Ultrafine Grained and Nanostructured Materials، جلد ۵۸، شماره ۱، صفحات ۱۲۰-۱۳۱

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عنوان انگلیسی Hydrothermal synthesized α-Fe2O3/Mn2O3 nanocomposite for efficient photodegradation of methylene blue under visible light
چکیده انگلیسی مقاله Treating wastewater using transition metal oxide nanocomposites as efficient photocatalysts has received more attention in recent years. In this work, to develop a new efficient photocatalyst based on metal oxides, the α-Fe2O3/Mn2O3 heterojunction nanocomposite was prepared via a facile one-pot hydrothermal precipitate technique and characterized by FT-IR, XRD, UV-Vis, PL, SEM and TEM techniques. The results confirm the successful formation of α-Fe2O3/Mn2O3 nanocomposite. The as-prepared α-Fe2O3/Mn2O3 was assessed for the photodegradation of methylene blue (MB) as a model wastewater under visible light irradiation. The photocatalytic activity for degradation of MB was calculated to be 96.7% within 90 min. The kinetics of experimental data were studied using the Langmuir mechanism, resulting in a rate constant of 0.02521 min-1. The effect of different scavengers on photodegradation efficiency was investigated and the results predicted that the O2-° radicals are responsible for the degradation of MB dye molecules. The reusability after six cycles was studied without significant activity change, confirming the photocatalytic efficiency and stability of α-Fe2O3/Mn2O3 nanocomposite. Therefore, the as-prepared α-Fe2O3/Mn2O3 is a promising photocatalyst in the photodegradation of other organic dyes.
کلیدواژه‌های انگلیسی مقاله Heterojunction,α-Fe2O3/Mn2O3 nanocomposite,Methylene Blue,photodegradation

نویسندگان مقاله Aliakbar Dehno Khalaji |
Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran


نشانی اینترنتی https://jufgnsm.ut.ac.ir/article_102482_2c654ffc1cfba7cd82078390712c2f0d.pdf
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