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Controlled Phase Changes of Titania Using Nitrogen Plasma.

R Trejo-Tzab1, Liliana Caballero-Espada2, P Quintana3

  • 1Facultad de Ingeniería Química, Universidad Autónoma de Yucatán, Mérida, Yucatán, 97203, México. rudy.trejo@correo.uady.mx.

Nanoscale Research Letters
|January 17, 2017
PubMed
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A new nitrogen plasma (AC) technique crystallizes amorphous titanium oxide (TiO2) into nanostructured anatase and rutile phases. This method offers lower energy costs and faster processing than traditional high-temperature heat treatments.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Plasma Physics

Background:

  • Titanium dioxide (TiO2) is a crucial material with diverse applications.
  • Conventional methods for TiO2 crystallization often require high temperatures and long durations.
  • Developing energy-efficient and rapid crystallization techniques is essential.

Purpose of the Study:

  • To develop a novel crystallization technique for titanium oxide using nitrogen plasma.
  • To investigate the influence of plasma treatment parameters on TiO2 phase formation.
  • To compare the plasma-based method with traditional thermal treatments.

Main Methods:

  • Amorphous TiO2 nanoparticles were synthesized using the sol-gel method.
  • The amorphous TiO2 was subjected to AC nitrogen plasma treatment under controlled pressure, power, and time.
Keywords:
Nitrogen plasmaPlasma dischargePlasma treatmentTitania

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  • Characterization was performed using X-ray diffraction (XRD), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS).

    • Main Results:

    • The AC plasma treatment successfully induced crystallization of TiO2 into anatase and rutile phases.
    • The proportion of anatase and rutile phases was directly correlated with plasma power and treatment time.
    • The plasma technique yielded smaller crystal sizes compared to conventional thermal methods.
    • Phase polymorphic changes were achieved without prolonged high-temperature exposure.

    Conclusions:

    • AC nitrogen plasma treatment is an innovative and efficient method for crystallizing amorphous TiO2.
    • This technique offers a low-energy alternative to conventional high-temperature treatments for TiO2.
    • The ability to control phase composition through plasma parameters opens new avenues for TiO2 material design.