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Rationalization of the X-ray photoelectron spectroscopy of aluminium phosphates synthesized from different precursors

Research output: Contribution to journalArticlepeer-review

  • Dr Victoria Louise Bemmer
  • Michael Bowker
  • James H. Carter
  • Philip R. Davies
  • Lee E. Edwards
  • Kenneth D. M. Harris
  • Colan E. Hughes
  • Fiona Robinson
  • David J. Morgan
  • Matthew G. Thomas
The aim of this paper is to clarify the assignments of X-ray photoelectron spectra of aluminium phosphate materials prepared from the reaction of phosphoric acid with three different aluminium precursors [Al(OH)3, Al(NO3)3 and AlCl3] at different annealing temperatures. The materials prepared have been studied by X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), infrared spectroscopy and high-resolution solid-state 31P NMR spectroscopy. A progressive polymerization from orthophosphate to metaphosphates is observed by XRD, ATR-FTIR and solid state 31P NMR, and on this basis the oxygen states observed in the XP spectra at 532.3 eV and 533.7 eV are assigned to P–O–Al and P–O–P environments, respectively. The presence of cyclic polyphosphates at the surface of the samples is also evident.
Original languageEnglish
Pages (from-to)8444-8452
JournalRSC Advances
Volume10
Issue number14
Early online date26 Feb 2020
DOIs
Publication statusEarly online - 26 Feb 2020

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