Effect of the phase composition and crystal size of sol-gel TiO2 nanoparticles on the NOx photodecomposition

Abstract

TiO2 nanoparticles with interesting physicochemical properties were synthesized by means of the sol-gel method and acid hydrolysis. The obtained nanoparticles were characterized by the X ray diffraction (XRD), Rietveld refinement, Brunauer Emmett Teller (BET) and transmission electron microscopy (TEM) techniques, and tested in the photodecomposition of NOx. The NOx decomposition degree reached by the sol-gel TiO2 nanoparticles was directly proportional to the brookite mass fraction, but inversely proportional to both the anatase mass fraction and the crystal size.

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Correspondence to R. Carrera.

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Carrera, R., Castillo, S. & Castillo, N. Effect of the phase composition and crystal size of sol-gel TiO2 nanoparticles on the NOx photodecomposition. MRS Online Proceedings Library 1275, 21 (2010). https://doi.org/10.1557/PROC-1275-S3-P21

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Keywords

  • Sol-gel
  • transmission electron microscopy (TEM)
  • X ray diffraction (XRD)
  • crystal