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[2604-04-01] Water purification ability and electrical conductivity of iron-aluminosilicate glass prepared by sol-gel method

〇Khan Irfan¹、Salah A¹、Bofan Z¹、Akiyama K¹、 Nomura K¹、Kubuki S¹、Homonnay Z²、Kuzmann E²、Sinkó K²、Pavić L³ (1. Tokyo Metropolitan University、2. Institute of Chemistry, Eötvös Loránd University、3. Division of Materials Chemistry, Ruđer Bosković Institute)

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In today’s world, one of the major problems is handling and cleaning the wastewater polluted with organic compounds. Our main purpose is to prepare a visible-light driven photocatalyst with a facile method. Hematite (α-Fe₂O₃) is a suitable material, due to its photocatalytic properties, narrow bandgap of 2.2 eV, chemical stability, nontoxicity and natural availability. In this research iron-containing aluminosilicate glass samples with composition xFe₂O₃ • yAl₂O₃ • (100 – x – y) SiO₂ abbreviated as xFyAS for photo-Fenton catalyst were prepared by a sol-gel method. The catalytic performance of the glass samples was evaluated by the degradation of methylene blue dye (MB), Rhodamine B dye aqueous solution (RhB_aq) and simulated wastewater solution. The structure is characterized using ⁵⁷Fe-Mössbauer spectroscopy (FeMS), Impedance spectroscopy (IS), and ultraviolet-visible absorption spectroscopy (UV–Vis). Furthermore, a relationship between the local structure and electrical conductivity properties of samples was investigated to detect new aspects of alumina addition to the glass samples.