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A facile preparation of dual-phase nitrogen-doped TiO2–SrTiO3 macroporous monolithic photocatalyst for organic dye photodegradation under visible light

Ruzimuradov, Olim and Sharipov, Kongratbay and Yarbekov, Abdurasul and Saidov, Kamoladdin and Hojamberdiev, Mirabbos and Prasad, Ravi Mohan and Cherkashinin, Gennady and Riedel, Ralf (2015):
A facile preparation of dual-phase nitrogen-doped TiO2–SrTiO3 macroporous monolithic photocatalyst for organic dye photodegradation under visible light.
In: Journal of the European Ceramic Society, 35 (6), Elsevier Science Publishing, pp. 1815-1821, ISSN 09552219,
[Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2014.12.023],
[Article]

Abstract

A dual-phase nitrogen-doped TiO2–SrTiO3 macroporous monolithic photocatalyst was fabricated through the impregnation of the preformed TiO2 gel in a Sr2+-containing alcohol–water solution followed by nitridation under a modest flow of ammonia gas at 800 °C for 2 h. The fabricated monolithic photocatalyst was characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry, N2 gas adsorption (SBET), X-ray photoelectron spectroscopy (XPS), and ultraviolet–visible (UV–vis) spectroscopy. The XRD results showed that the fabricated monolithic photocatalyst is comprised of two crystalline phases (anatase TiO2 and SrTiO3) and possesses a highly interconnected (co-continuous) macroporous framework. The photocatalytic activity of the fabricated monolithic photocatalyst was evaluated by the photodegradation of organic dye (Rhodamine B) over the samples under visible light. As expected, the N-doped TiO2–SrTiO3 macroporous monolithic photocatalyst showed a higher photodegradation rate constant (0.0019 min−1) compared to the undoped TiO2–SrTiO3 (0.0010 min−1) under the identical experimental conditions due mainly to the band gap reduction.

Item Type: Article
Erschienen: 2015
Creators: Ruzimuradov, Olim and Sharipov, Kongratbay and Yarbekov, Abdurasul and Saidov, Kamoladdin and Hojamberdiev, Mirabbos and Prasad, Ravi Mohan and Cherkashinin, Gennady and Riedel, Ralf
Title: A facile preparation of dual-phase nitrogen-doped TiO2–SrTiO3 macroporous monolithic photocatalyst for organic dye photodegradation under visible light
Language: English
Abstract:

A dual-phase nitrogen-doped TiO2–SrTiO3 macroporous monolithic photocatalyst was fabricated through the impregnation of the preformed TiO2 gel in a Sr2+-containing alcohol–water solution followed by nitridation under a modest flow of ammonia gas at 800 °C for 2 h. The fabricated monolithic photocatalyst was characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry, N2 gas adsorption (SBET), X-ray photoelectron spectroscopy (XPS), and ultraviolet–visible (UV–vis) spectroscopy. The XRD results showed that the fabricated monolithic photocatalyst is comprised of two crystalline phases (anatase TiO2 and SrTiO3) and possesses a highly interconnected (co-continuous) macroporous framework. The photocatalytic activity of the fabricated monolithic photocatalyst was evaluated by the photodegradation of organic dye (Rhodamine B) over the samples under visible light. As expected, the N-doped TiO2–SrTiO3 macroporous monolithic photocatalyst showed a higher photodegradation rate constant (0.0019 min−1) compared to the undoped TiO2–SrTiO3 (0.0010 min−1) under the identical experimental conditions due mainly to the band gap reduction.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 35
Number: 6
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Photocatalysis, TiO2–SrTiO3, Nitrogen doping, Macroporosity, Porous monolith
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Surface Science
Date Deposited: 05 Feb 2015 09:53
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2014.12.023
Identification Number: doi:10.1016/j.jeurceramsoc.2014.12.023
Funders: OR and MH would like to thank the Erasmus–Mundus FAME (Functionalized Advanced Materials and Engineering) Master Program for Visiting Scholarships under which the present study was carried out., Also, this work was partially supported by the Fundamental Scientific Program for Young Scientists (YF7-002) of the Committee for the Coordination of Scientific and Technological Development under the Cabinet of the Ministers of the Republic of Uzbekistan
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