Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629591 | Journal of the European Ceramic Society | 2015 | 7 Pages |
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 minâ1) compared to the undoped TiO2-SrTiO3 (0.0010 minâ1) under the identical experimental conditions due mainly to the band gap reduction.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Olim Ruzimuradov, Kongratbay Sharipov, Abdurasul Yarbekov, Kamoladdin Saidov, Mirabbos Hojamberdiev, Ravi Mohan Prasad, Gennady Cherkashinin, Ralf Riedel,