Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Phase Transformation Characteristics of Combustion-Synthesized TiO2 Nanoparticles

연소합성 TiO2 나노입자의 고온 상변환 특성에 관한 연구

  • 최상민 (전북대학교 기계항공시스템공학부 대학원) ;
  • 이교우 (전북대학교 기계항공시스템공학부)
  • Published : 2008.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this article, $TiO_2$ nanoparticles were synthesized by using $O_2$-enriched coflow, hydrogen, diffusion flames. We investigated the thermal stability of the flame-synthesized $TiO_2$ nanoparticles by examining the crystalline structures of the nanoparticles. Also, the results were compared with those of commercial P-25 nanoparticles. $TiO_2$ nanoparticles, which were spherical with diameters approximately ranging from 30 to 60nm, were synthesized. From the XRD analyses, about 96wt% of the synthesized nanoparticles were anatase-phase. After the heat-treatment at $800^{\circ}C$ for 30 minutes, the synthesized $TiO_2$ nanoparticles showed no significant changes of their shapes and crystalline phases. On the other hand, most of the commercial particles sintered with each other and changed to the rutile-phase. Based on the result of XRD analysis it is believed that the flame-synthesized $TiO_2$ nanoparticles have higher thermal stability at $800^{\circ}C$ than the commercial particles.

Keywords

References

  1. Jang, H. D., Kim, S. K. and Kim, S. J., 2001, 'Effect of Particle Size and Phase Composition of Titanium Dioxide Nanoparticles on the Photocatalytic Properties,' J. Nanoparticle Research, Vol. 3, pp. 141-147 https://doi.org/10.1023/A:1017948330363
  2. Pratsinis, S. E., Zhu, W. and Vemury, S., 1996, 'The Role of Gas Mixing in Flame Synthesis of Titania Powders,' Powder Tech., Vol. 86, pp. 87-93 https://doi.org/10.1016/0032-5910(95)03041-7
  3. Katzer, M., Weber, A. P. and Kasper, G., 2001, 'The Effects of Electric Fields on Growth of Titania Particles Formed in a $CH_4O_2$ Diffusion Flame,' J. Aerosol Sci., Vol. 32, pp. 1045-1067 https://doi.org/10.1016/S0021-8502(01)00041-6
  4. Yang, G., Zhuang, H. and Biswas, P., 1996, 'Characterization and Sinterability of Nanophase Titania Particles Processed in Flame Reactor,' Nanostructured Materials, Vol. 7, No. 6, pp. 675-689 https://doi.org/10.1016/0965-9773(96)00033-5
  5. Nakaso, K., Okuyama, K., Shimada, M. and Pratsinis, S. E., 2003, 'Effect of Reaction Temperature on CVD-made $TiO_2$ Primary Particle Diameter,' Chem. Eng. Sci., Vol. 58, pp. 3327-3335 https://doi.org/10.1016/S0009-2509(03)00213-6
  6. Xia, B., Huang, H. and Xie, Y., 1999, 'Heat Treatment on TiO2 Nanoparticles Prepared by Vapor-phase Hydrolysis,' Mat. Sci. Eng. B, Vol. 57, pp. 150-154 https://doi.org/10.1016/S0921-5107(98)00322-5
  7. Park, J. K., Ahn, J. P., and Kim, G., 1999, 'Effect of Compact Structure on Phase Transformation Kinetics from Anatase Phase to Rutile Phase and Microstructure Evolution During Sintering of Ultrafine Titania Powder Compacts,' Metals and Materials, Vol. 5, No. 2, pp. 129-134 https://doi.org/10.1007/BF03026042
  8. Lee, D., Yang, S., and Choi, M., 2001, 'Controlled Formation of Nanoparticles Utilizing Laser Irradiation in a Flame and Their Characteristics,' Applied Physics Letters, Vol. 79, No. 15, pp. 2459-2461 https://doi.org/10.1063/1.1409589
  9. Lee, D. and Choi, M., 2002, 'Coalescence Enhanced Synthesis of Nanoparticles to Control Size, Morphology and Crystalline Phase at High Concentrations,' Journal of Aerosol Science, Vol. 33, pp. 1-16 https://doi.org/10.1016/S0021-8502(01)00155-0
  10. Okada, K., Yamamoto, N., Kameshima, Y., Yasumori, A. and MacKenzie, K. J. D., 2001, 'Effect of Silica Additive on the Anatase-to-Rutile Phase Transition,' J. Am. Ceram. Soc., Vol. 84, No. 7, pp. 1591-1596 https://doi.org/10.1111/j.1151-2916.2001.tb00882.x
  11. Spurr, R. A., and Myers, H., 1957, 'Quantative Analysis of Anatase-rutile Mixtures with an X-ray Diffractometer,' Anal. Chem., Vol. 29, No. 5, pp. 760-761 https://doi.org/10.1021/ac60125a006