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

Huihui Li, Shu Yin, Tsugio Sato

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45 Citations (Scopus)

Abstract

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°C for 2h 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.

Original languageEnglish
Pages (from-to)586-591
Number of pages6
JournalApplied Catalysis B: Environmental
Volume106
Issue number3-4
DOIs
Publication statusPublished - 2011 Aug 11

Keywords

  • Composite
  • DeNO
  • Luminescent photocatalyst
  • Persistent photocatalytic system

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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