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Issue 36, 2008
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Photocatalytic decomposition of acetone using LaTi(O,N)3nanoparticles under visible light irradiation

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Abstract

Nanoparticles of the oxynitride perovskite LaTi(O,N)3 have been synthesized by the polyol technique and subsequent ammonolysis at different temperatures, namely 800, 870, 920 and 1000 °C. The obtained compounds were investigated by XRD, TEM, BET, and UV-Vis spectroscopy. The nitrogen content was measured by ERDA analysis. Even at the lowest reaction temperature well crystalline single phase oxynitrides were obtained. With increasing nitridation temperature the colors of the samples changed from orange to red and brown resulting from a decrease of the optical band gap. This color variation is accompanied by a higher nitrogen content, an increase in the particle sizes and a reduction in the BET surface area. The photocatalyzed decomposition of acetone under visible light (λ>420 nm) was measured by in situinfrared spectroscopy. The sample reacted at 870 °C showed the highest activity. The photocatalytic properties of the different samples are compared and the influence of the physical properties on the photocatalytic efficiency of the samples is discussed.

Graphical abstract: Photocatalytic decomposition of acetone using LaTi(O,N)3 nanoparticles under visible light irradiation

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Article information


Submitted
22 Apr 2008
Accepted
16 Jun 2008
First published
29 Jul 2008

J. Mater. Chem., 2008,18, 4260-4265
Article type
Paper

Photocatalytic decomposition of acetone using LaTi(O,N)3 nanoparticles under visible light irradiation

R. Aguiar, A. Kalytta, A. Reller, A. Weidenkaff and S. G. Ebbinghaus, J. Mater. Chem., 2008, 18, 4260
DOI: 10.1039/B806794E

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