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Emanation thermal analysis study of N-doped titania photoactive powders

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Abstract

Thermal behaviour of N-doped titania powders prepared by heat treatment of anatase in gaseous ammonia at 550 and 575°C, respectively, was characterized by emanation thermal analysis (ETA). The ETA results were used to assess transport properties of the samples subsurface using the mobility data of radon atoms previously incorporated into the samples to the depth of 60 nm. It was demonstrated that the radon permeability of anatase in the temperature range 50–500°C was enhanced for the N-doped titania as compared to the non-doped titania powder. Microstructure changes accompanying the anatase-rutile transition were pointed out from the decrease of the radon release rate in the temperature range 850–1000°C. The results of surface area and porosity measurements, DTA results as well XRD patterns supported the ETA results.

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Authors and Affiliations

  1. Nuclear Research Institute Řež, plc, 250 68, Řež, Czech Republic

    V. Balek

  2. Institute of Inorganic Chemistry, ASCR, 250 68, Řež, Czech Republic

    J. Ŝubrt

  3. Chemical Faculty, Moscow State University, 199234, Moscow, Russia

    I. M. Bountseva

  4. Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan

    H. Irie & K. Hashimoto

  5. Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan

    K. Hashimoto

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  1. V. Balek
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  2. J. Ŝubrt
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  3. I. M. Bountseva
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  4. H. Irie
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  5. K. Hashimoto
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Correspondence to V. Balek.

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Balek, V., Ŝubrt, J., Bountseva, I.M. et al. Emanation thermal analysis study of N-doped titania photoactive powders. J Therm Anal Calorim 92, 161–167 (2008). https://doi.org/10.1007/s10973-007-8755-7

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  • DOI: https://doi.org/10.1007/s10973-007-8755-7

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