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Research on Chemical Intermediates

, Volume 34, Issue 4, pp 403–416 | Cite as

Synthesis of sol–gel Na2Zr x Ti6−x O13 (0≤x≤1) materials and their performance in photocatalytic degradation of organic dyes

  • Leticia M. Torres-Martínez
  • Arquímedes Cruz-López
  • Lorena L. Garza-Tovar
  • Karina del Ángel
  • Isaías Juárez Ramírez
Article

Abstract

In this work we present the synthesis and characterization of four compositions of the solid solution with the general formula Na2Zr x Ti6−x O13 (0≤x≤1) which was prepared by a sol-gel method. The main goal of this work is to evaluate the influence of the incorporation of different amounts of zirconium into the binary phase Na2Ti6O13 on two properties: the textural surface and E g values. This titanate phase crystallizes in a monoclinic unit cell and is built into an octahedral TiO6 framework forming a rectangular tunnel structure. Additionally, we have compared their photocatalytic performances in degradation of organic dyes under visible light. The heat-treated sol-gel samples were characterized by X-ray powder diffraction, N2 physisorption, thermal analysis, UV and FT-IR spectroscopy. According to the X-ray powder diffraction results, the new ternary tunnel compound Na2ZrTi5O13 was obtained as a single phase at 800°C. The cell parameters for the two end-member phases of that solid solution were refined to confirm that Zr ion was incorporated into the structural framework. This ternary compound had an E g value of about 2.9 eV. The activity of all heat-treated Na2ZrTi5O13 samples was tested in the photocatalytic degradation of methylene blue and Rhodamine B under visible light. The Na2ZrTi5O13 calcined at 400°C showed the best performance with 95% of photodegradation of methylene blue and a half time t 1/2 of 15 min.

Keywords

Photocatalysis tunnel structure materials methylene blue rhodamine 

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Copyright information

© Springer 2008

Authors and Affiliations

  • Leticia M. Torres-Martínez
    • 1
  • Arquímedes Cruz-López
    • 1
  • Lorena L. Garza-Tovar
    • 1
  • Karina del Ángel
    • 1
  • Isaías Juárez Ramírez
    • 1
  1. 1.Ecomaterials and Energy Department, Faculty of Civil EngineeringUniversidad Autónoma de Nuevo LeónNuevo LeónMéxico

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