Nanostructured mesoporous g-Fe2O3: a novel photocatalyst for degradation of organic pollutants

A.B. Hrubiak; O.Yu. Khyzhun; B.K. Ostafiychuk; V.V. Moklyak; Yu.V. Yavorskyi; R.P. Lisovsky; L.G. Keush; B.B. Onyskiv

doi:10.15330/pcss.22.1.101-109

Authors

A.B. Hrubiak G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine
O.Yu. Khyzhun Institute for Problems of Materials Sciences National Academy of Sciences of Ukraine
B.K. Ostafiychuk Vasyl Stefanyk Precarpathian National University; Institute of Metal Physics National Academy of Science
V.V. Moklyak G.V. Kurdyumov Institute of Metal Physics National Academy of Science
Yu.V. Yavorskyi National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
R.P. Lisovsky G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine; Ivano-Frankivsk National Medical University
L.G. Keush National Metallurgical Academy of Ukraine
B.B. Onyskiv Ivano-Frankivsk Scientific Research Forensic Center of the Ministry of Internal Affaris of Ukraine

DOI:

https://doi.org/10.15330/pcss.22.1.101-109

Keywords:

nanostuctured maghemite, mesoporous structure, conductivity, specific surface area, band gap, photocatalyst

Abstract

The modified sol-gel synthesis technique was used to created of nanostructured maghemite (γ-Fe₂O₃). It has been shown that the molar concentration of the original precursors during synthesis affects on the average particle sizes, specific surface area, pore size distributions, optical and conductivity properties. The XPS metod allowed to establish features of electronic structure of the synthesized materials. Optimal conditions for the synthesis of nanostructured maghemite with mesoporous structure were selected. The mechanism of electrical conductivity formation for synthesized mesoporous materials was established. The width of the band gap is determined and its dependence on the molar concentration of precursors is established. The positive correlation between the specific surface area of γ-Fe₂O₃ samples and photocatalytic activity was installed - the photocatalytic activity of synthesized γ-Fe₂O₃ increase with growth of specific surface area of γ-Fe₂O₃ samples.

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