Photocatalytic degradation of organic dyes and phenol by iron-silicate glass prepared by the sol–gel method

Irfan Khan; Kazuhiko Akiyama; Akiko Inagaki; Ahmad Salah Ali; Ernő Kuzmann; Zoltán Homonnay; Katalin Sinkó; Nina Popov; Shudhanshu Shekhar Pati; Shiro Kubuki

doi:10.1039/D1NJ03459F

Photocatalytic degradation of organic dyes and phenol by iron-silicate glass prepared by the sol–gel method†

Irfan Khan,

*^a Kazuhiko Akiyama,^a Akiko Inagaki,

^a Ahmad Salah Ali,^b Ernő Kuzmann,^c Zoltán Homonnay,^c Katalin Sinkó,^c Nina Popov,^d Shudhanshu Shekhar Pati^e and Shiro Kubuki^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachi-Oji, Tokyo 192-0397, Japan
E-mail: dr.irfank94@gmail.com

^b Department of Physics, Faculty of Science, Al-Azher University, Assiut 71542, Egypt

^c Institute of Chemistry, Eötvös Loránd University Pázmány P. s., 1/A, Budapest 1117, Hungary

^d Division of Materials Chemistry, Ruđer Bosković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia

^e Department of Chemistry, National Institute of Technology, Jamshedpur 831014, India

Abstract

A highly efficient photo-Fenton catalyst iron silicate glass was successfully prepared by a simple sol–gel method. The characterization results (XRD, Mössbauer spectroscopy, TEM, and FT-IR) showed that fayalite, clinoferrosilite and hematite nanoparticles were precipitated in the glass system. The catalytic activity of the glass samples was evaluated by measuring the degradation efficiency for organic dyes as well as for a typical persistent organic pollutant phenol, under visible light irradiation, in the presence of hydrogen peroxide (H₂O₂). The chemical oxygen demand (COD) and total organic carbon (TOC) were measured to see the progress in degradation of phenol. The results showed that the catalyst containing 20% iron had good catalytic properties for the degradation of both types of organic contaminants with superior stability for the degradation of methylene blue dye even after six cycles. Finally, a possible photocatalytic mechanism was proposed.

New Journal of Chemistry

Photocatalytic degradation of organic dyes and phenol by iron-silicate glass prepared by the sol–gel method†

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Photocatalytic degradation of organic dyes and phenol by iron-silicate glass prepared by the sol–gel method

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