Photoreactivity of TSP: A novel microporous titanosilicate

Morag Murdoch, Rachel Yeates, Russell Francis Howe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The photoreactivity of TSP, a microporous titanosilicate with the pharmacosiderite structure consisting of nanoclusters of titania octahedra linked through silicate tetrahedra, has been studied by EPR spectroscopy. UV irradiation of TSP in the presence of O-2 produces the EPR signal of holes trapped at. oxide ion sites (O-). This is attributed to the scavenging of electrons by O-2. The trapped holes in TSP are much more stable than the corresponding species in TiO2. Reaction of O-2 with O- to form O-3(-) is also observed. Trapped holes can be seen as well when TSP is irradiated in the presence of adsorbed CO2, which can also act as an electron scavenger.

Original languageEnglish
Pages (from-to)184-190
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume101
Issue number1-2
Early online date5 Dec 2006
DOIs
Publication statusPublished - 19 Apr 2007

Keywords

  • pharmacosiderite
  • titanosilicate
  • EPR
  • hole trapping
  • photoreactivity
  • electron trapping
  • electron-paramagnetic-resonance
  • anatase TIO2 particles
  • ion-exchange
  • molecular-oxygen
  • magnesium-oxide
  • ETS-10
  • reactivity
  • surfaces

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