期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 35, 期 6, 页码 1815-1821出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2014.12.023
关键词
Photocatalysis; TiO2-SrTiO3; Nitrogen doping; Macroporosity; Porous monolith
资金
- Fundamental Scientific Program for Young Scientists of the Committee for the Coordination of Scientific and Technological Development under the Cabinet of the Ministers of the Republic of Uzbekistan [YF7-002]
- Erasmus-Mundus FAME (Functionalized Advanced Materials and Engineering) Master Program
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 degrees C for 2 h. The fabricated monolithic photocatalyst was characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry, N-2 gas adsorption (S-BET), 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. (C) 2014 Elsevier Ltd. All rights reserved.
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