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Fabrication of nitrogen-doped TiO2 monolith with well-defined macroporous and bicrystalline framework and its photocatalytic performance under visible light

Ruzimuradov, Olim and Nurmanov, Suvankul and Hojamberdiev, Mirabbos and Prasad, Ravi Mohan and Gurlo, Aleksander and Broetz, Joachim and Nakanishi, Kazuki and Riedel, Ralf (2014):
Fabrication of nitrogen-doped TiO2 monolith with well-defined macroporous and bicrystalline framework and its photocatalytic performance under visible light.
34, In: Journal of the European Ceramic Society, (3), Elsevier Science Publishing, pp. 809-816, ISSN 09552219, [Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2013.10.009],
[Article]

Abstract

In this study, hierarchically porous bicrystalline nitrogen-doped titania (N-doped TiO2) monolithic material was fabricated by a simple two-step approach: (i) preparation of TiO2 porous monolith by a sol–gel process of titanium alkoxide in a mild condition utilizing a chelating agent and mineral salt and (ii) annealing of TiO2 porous monolith obtained under a modest flow of ammonia gas at 700 °C for 2 h. The phase composition, crystal structure, morphology, pore structure, and porous properties of the final product were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry, and nitrogen physisorption measurement, respectively. The resultant N-doped TiO2 porous monolith possesses a bicrystalline (anatase and rutile) framework with a well-defined macroporosity. The results from X-ray photoelectron spectroscopy (XPS) confirm the formation of Osingle bondTisingle bondN bonds in the N-doped TiO2 porous monolith. The photocatalytic activity of N-doped TiO2 porous monolith was evaluated by the photodegradation of Rhodamine B over the samples under visible light. Nearly 50% of Rhodamine B in aqueous solution was efficiently degraded by N-doped TiO2 porous monolith with the mixed-phase of anatase and rutile under visible light within 120 min.

Item Type: Article
Erschienen: 2014
Creators: Ruzimuradov, Olim and Nurmanov, Suvankul and Hojamberdiev, Mirabbos and Prasad, Ravi Mohan and Gurlo, Aleksander and Broetz, Joachim and Nakanishi, Kazuki and Riedel, Ralf
Title: Fabrication of nitrogen-doped TiO2 monolith with well-defined macroporous and bicrystalline framework and its photocatalytic performance under visible light
Language: English
Abstract:

In this study, hierarchically porous bicrystalline nitrogen-doped titania (N-doped TiO2) monolithic material was fabricated by a simple two-step approach: (i) preparation of TiO2 porous monolith by a sol–gel process of titanium alkoxide in a mild condition utilizing a chelating agent and mineral salt and (ii) annealing of TiO2 porous monolith obtained under a modest flow of ammonia gas at 700 °C for 2 h. The phase composition, crystal structure, morphology, pore structure, and porous properties of the final product were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry, and nitrogen physisorption measurement, respectively. The resultant N-doped TiO2 porous monolith possesses a bicrystalline (anatase and rutile) framework with a well-defined macroporosity. The results from X-ray photoelectron spectroscopy (XPS) confirm the formation of Osingle bondTisingle bondN bonds in the N-doped TiO2 porous monolith. The photocatalytic activity of N-doped TiO2 porous monolith was evaluated by the photodegradation of Rhodamine B over the samples under visible light. Nearly 50% of Rhodamine B in aqueous solution was efficiently degraded by N-doped TiO2 porous monolith with the mixed-phase of anatase and rutile under visible light within 120 min.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 34
Number: 3
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Titania monolith, Nitrogen doping, Porosity, Ammonolysis, Photocatalyst
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Structure Research
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 21 Feb 2014 09:41
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2013.10.009
Identification Number: doi:10.1016/j.jeurceramsoc.2013.10.009
Funders: OR would like to thank the Erasmus – Mundus FAME (Functionalized Advanced Materials and Engineering) Master Program for Visiting Scholarship under which the present study was carried out. , MH would like to thank the Alexander von Humboldt (AvH) Stiftung for the award of a postdoctoral research fellowship.
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