Novel luminescent photocatalytic deNOx activity of CaAl2O4:(Eu, Nd)/TiO2-xNy composite

被引：53

作者：

Li, Huihui ^{[1
]}

Yin, Shu ^{[1
]}

Sato, Tsugio ^{[1
]}

机构：

[1] Tohuko Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 106卷 / 3-4期

关键词：

Luminescent photocatalyst; DeNO(x); Composite; Persistent photocatalytic system; THERMAL-STABILITY; SURFACE-AREA; TIO2; PHOSPHOR; DY3+;

D O I：

10.1016/j.apcatb.2011.06.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The systematic experiments of photocatalytic degradation of NO gas were carried out by using novel composites containing TiO2-xNy loaded on a long afterglow phosphor, CaAl2O4:(Eu,Nd). The composites were prepared in a sequence of procedures, which involved reactions of TiCl3 and hexamethylenetetramine (HMT) mixed solution at 190 degrees C for 2 h to precipitate nano-size TiO2-xNy particles, followed by mixing the TiO2-xNy with a micro-size CaAl2O4:(Eu,Nd) particles by a soft planetary ball milling to yield CaAl2O4:(Eu,Nd)/TiO2-xNy composites. Photocatalytic degradation of NO was monitored both under UV light irradiation and in the dark after turning off the light. The composite displayed excellent photocatalytic activity under UV-light irradiation as well as persistent activity after turning off light. A promising strategy involves coupling of visible light responsive photocatalyst with long afterglow phosphor was established. It is a new concept for the photocatalyst synthesis implying a possibility of a novel persistent active photocatalytic system. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：586 / 591

页数：6

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