Title: Synthesis and photocatalytic activity of Sr4Al14O25:(Eu, Dy)/TiO2-xNy composite photocatalyst

Authors: Huihui Li; Shu Yin; Yuhua Wang; Qiang Dong; Chongshen Guo; Tsugio Sato

Addresses: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan; School of Physical Science and Technology, Lanzhou University, Gansu, China. ' Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan. ' School of Physical Science and Technology, Lanzhou University, Gansu, China. ' Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan. ' Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan. ' Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan

Abstract: Sr4Al14O25:(Eu, Dy)/TiO2-xNy composites were synthesised via the solvothermal reaction followed by the mild ball-milling, and the photocatalytic activities were evaluated for deNOx ability both under artificial solar irradiation with 69.3 W/m² and after turning off the light. It was confirmed that TiO2-xNy nanoparticles with rutile phase could be uniformly dispersed on the surface of Sr4Al14O25:(Eu, Dy). The improvement of photocatalytic deNOx ability of TiO2-xNy, together with the persistent photocatalytic activity for the decomposition of NO gas after turning off the light was realised.

Keywords: photocatalytic activity; deNOx; persistent decomposition; visible light induction; titanium dioxide; nitrogen-doped; long afterglow phosphor; blue fluorescence; artificial solar irradiation; darkness; air purification; composites; nanoparticles; nanotechnology.

DOI: 10.1504/IJNT.2013.050876

International Journal of Nanotechnology, 2013 Vol.10 No.1/2, pp.13 - 21

Published online: 07 Dec 2012 *

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