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

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Flame Temperature on the Characteristics of Flame Synthesized TiO2 Nanoparticles

수소 확산화염에서 화염온도가 TiO2 나노입자의 합성에 미치는 영향

  • 이교우 (전북대학교 기계항공시스템공학부) ;
  • 이승복 (한국과학기술원 대기자원연구센터) ;
  • 이종수 (한국과학기술연구원 대기자원연구센터) ;
  • 배귀남 (한국과학기술연구원 대기자원연구센터)
  • Published : 2005.09.01
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Abstract

In this work, $TiO_2$ nanoparticles were synthesized using a N2-diluted hydrogen coflow diffusion flame. The effects of flame temperature on the crystalline structure and the size of formed nanoparticles were investigated. The maximum centerline temperature of the flame ranged from 1,920K for $H_2-only$ flame to 863k for $81\%\;N_2-diluted$ flame. The morphology and the crystal structure of $TiO_2$ nanoparticles were analyzed by a TEM and a XRD, respectively. The particle size distribution was also measured by using a scanning mobility particle size. (SMPS). The mean particle diameter was calculated from the TEM images depended on the flame temperature, having minimum at about 1,look. Based on the SMPS measurements, the mean particle diameter of $TiO_2$ nanoparticles at flame temperatures > 1,300K was smaller than that at flame temperatures < 1,300K. From the XRD analysis, it was evident that the anatase fraction increased with decreasing the flame temperature. The portion of anatase phase in $TiO_2$ nanoparticles might be greater than $80\%$ when the flame temperature was lower than 1,000K.

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References

  1. Okuyama, K., Ushio, R., Kousaka, Y., Flagan, R. C. and Seinfeld, J. H., 1990, 'Particle Generation in a Chemical Vapor Deposition Process with Seed Particles,' AIChE Journal, Vol. 36, No. 3, pp. 409-419 https://doi.org/10.1002/aic.690360310
  2. Seto, T., Shimada, M. and Okuyama, K., 1995, 'Evaluation of Sintering of Nanometer-Sized Titania Using Aerosol Method,' Aerosol Sci. Tech., Vol. 23, pp. 183-200 https://doi.org/10.1080/02786829508965303
  3. Kim, T. O., Suh, J. and Choi, M., 2001, 'An Experimental Study on Composition Characteristics of $SiO_2$/$TiO_2$ Multicomponent Particle Generated in a Coflow Diffusion Flame,' Trans. of the Korean Soc. of Mech. Engineers B, Vol. 25, No. 9, pp. 1175-1182
  4. Kashima, K. and Sugiyama, H., 1990, 'Particle Size Control of $TiO_2$ Ultrafine Particles by CVD Method,' Kagaku Kougaku Ronbunsyu, Vol. 16, pp. 551-556 https://doi.org/10.1252/kakoronbunshu.16.551
  5. 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
  6. Kumar, S. R., Pillai, S. C., Hareesh, U. S., Mukundan, P. and Warrier, K. G. K., 2000, 'Synthesis of Thermally Stable, High Surface Area Anatase-Alumina Mixed Oxides,' Materials Letters, Vol. 43, pp. 286-290 https://doi.org/10.1016/S0167-577X(99)00275-X
  7. 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
  8. 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
  9. 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
  10. 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
  11. Katzer, M., Weber, A. P. and Kasper, G., 2001, 'The Effects of Electric Fields on Growth of Titania Particles Formed in a $CH_4-O_2$ Diffusion Flame,' J. Aerosol Sci., Vol. 32, pp. 1045-1067 https://doi.org/10.1016/S0021-8502(01)00041-6
  12. Lee, D. G. and Choi, M. S., 2002, 'Coalescence Enhanced Synthesis of Nanoparticles to Control Size, Morphology and Crystalline Phase at High Concentrations,' J. Aerosol Sci., Vol. 33, pp. 1-16 https://doi.org/10.1016/S0021-8502(01)00155-0
  13. Ahn, K. H., Jung, C. H., Choi, M. and Lee, J. S., 2001, 'Particle Sampling and Real Time Size Distribution Measurement in $H_2/O_2/TEOS$ Dffusion Fame,' J. Nanoparticle Research, Vol. 3, pp. 161-170 https://doi.org/10.1023/A:1017942805637
  14. McenalIy, C. S., Koylu, Umit O., Pfefferle, L. D., and Rosner, D. E., 1997, 'Soot Volume Fraction and Temperature Measurements in Laminar Nonpremixed Flames Using Thermocouples,' Combust. Flame, Vol. 109, pp. 701-720 https://doi.org/10.1016/S0010-2180(97)00054-0
  15. Lee, G. W., Jurng, J. and Hwang, J., 2002, 'Soot Concentration and Temperature Measurements in Laminar Ethylene Jet Double-Concentric Diffusion Flames,' Trans. of the Korean Soc. of Mech. Engineers B, Vol. 26, No. 3, pp. 402-409 https://doi.org/10.3795/KSME-B.2002.26.3.402