Persistent luminescence assisted photocatalytic properties of CaAl 2O 4:(Eu,Nd)/TiO 2-xN y and Sr 4Al 14O 25:(Eu,Dy)/TiO 2-xN y

Huihui Li, Shu Yin, Yuhua Wang, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The systematic experiments of photocatalytic degradation of NO gas and acetaldehyde were carried out by using novel composites consisting of TiO 2-xN y loaded on two types of long afterglow phosphor, CaAl 2O 4:(Eu,Nd) and Sr 4Al 14O 25:(Eu,Dy). The two kinds of composites were prepared in a sequence of the same procedures, which involved reactions of TiCl 3 and hexamethylenetetramine (HMT) mixed solution at 190 °C for 2 h to precipitate nano-size TiO 2-xN y particles, followed by mixing the TiO 2-xN y with a micro-size CaAl 2O 4:(Eu,Nd) or Sr 4Al 14O 25:(Eu,Dy) particles by a facile planetary ball milling to yield CaAl 2O 4:(Eu,Nd)/TiO 2-xN y or Sr 4Al 14O 25:(Eu,Dy)/TiO 2-xN y composites. Both composites showed the persistent photocatalytic degradation of NO and acetoaldehyde after turning off the light. CaAl 2O 4:(Eu,Nd) /TiO 2-xN y showed higher persistent NO destruction ability in dark after turning off the light, while Sr 4Al 14O 25:(Eu,Dy)/TiO 2-xN y is excellent in CH 3CHO removal. The difference in the photocatalytic activity observed for CaAl 2O 4:(Eu,Nd)/TiO 2-xN y and Sr 4Al 14O 25:(Eu,Dy)/TiO 2-xN y might be attributed to the difference in the emission property.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalJournal of Molecular Catalysis A: Chemical
Volume363-364
DOIs
Publication statusPublished - 2012 Nov 1

Keywords

  • Acetaldehyde
  • Nitrogen-doped TiO
  • Persistent luminescence assisted
  • Photocatalytic reaction
  • deNO

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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