Preparation of SiO2/TiO2 Core-Shell Particles Using Large-Size Silica Particles

대구경 실리카 입자를 이용한 실리카/티타니아 코어-쉘 입자의 제조

  • Park, Young-Hun (College of Environment & Applied Chemistry, Kyunghee University) ;
  • Lee, Jae-Won (College of Environment & Applied Chemistry, Kyunghee University) ;
  • Gong, Sungmin (College of Environment & Applied Chemistry, Kyunghee University) ;
  • Kim, Woo-Sik (College of Environment & Applied Chemistry, Kyunghee University) ;
  • Kim, Jinsoo (College of Environment & Applied Chemistry, Kyunghee University)
  • 박영훈 (경희대학교 환경.응용화학대학) ;
  • 이재원 (경희대학교 환경.응용화학대학) ;
  • 공성민 (경희대학교 환경.응용화학대학) ;
  • 김우식 (경희대학교 환경.응용화학대학) ;
  • 김진수 (경희대학교 환경.응용화학대학)
  • Received : 2007.02.02
  • Accepted : 2007.03.16
  • Published : 2007.04.10

Abstract

$SiO_2/TiO_2$ core-shell particles with controlled shell thickness were prepared using large silica particles. The thickness of titania coating layer was varied from 8 nm to 38 nm depending on the number of coating steps from 1 to 3 times. After titania coating, the core-shell particles showed textured surface due to the titania coating layer, resulting in 3~25 times increase of specific surface areas. The properties of titania coated silica particles were characterized by FE-SEM, Zeta potential meter, BET, and XRD.

Acknowledgement

Supported by : KISTEP

References

  1. S. Komarneni, I. R. Abothu, and A. V. P. Rao, J. Sol-Gel Sci. Tech., 15, 263 (1999)
  2. L. J. Alemany, M. A. Banares, E. Pardo, and F. Martin, J. Adv. Oxid. Tech., 3, 155 (1998)
  3. S. M Koo, D. H. Lee, C. S. Ryu, and Y. E. Lee, J. Korean Ind. Eng. Chem., 8, 301 (1997)
  4. P. Cheng, M. P. Zheng, Y. P. Jin, Q. Huang, and M. Y. Gu, Mater. Lett., 57, 2989 (2003) https://doi.org/10.1016/S0167-577X(02)01409-X
  5. N. E. Quaranta, J. Soria, V. C. Corberan, and J. L. G. Fierro, J. Catal., 171, 1 (1997)
  6. X. A. Fu and S. Qutubuddin, Colloids Surf. A, 178, 151 (2001) https://doi.org/10.1016/S0927-7757(00)00703-2
  7. W. P. Hsu, R. Yu, and E. Matijevic, J. Coll. Inter. Sci., 156, 56 (1993)
  8. A. Hanprasopwattana, S. Srinivasan, A. G. Sault, and A. K. Datye, Langmuir, 12, 3173 (1996)
  9. K. D. Kim, H. J. Bae, and H. T. Kim, Colloids Surf. A, 224, 119 (2003) https://doi.org/10.1016/S0927-7757(03)00252-8
  10. J. W. Lee, K. Hong, W. S. Kim, and J. Kim, J. Ind. Eng. Chem., 11, 609 (2005)
  11. W. Stober, A. Fink, and E. Bohn, J. Coll. Inter. Sci., 26, 62 (1968) https://doi.org/10.1016/0021-9797(68)90272-5
  12. K. Hong, MS Thesis, Kyung Hee Univ., Seoul, Korea (2005)
  13. K. S. W. Sing, D. H. Everett, R. A. W. Haul, L. Moscou, R. A. Pierotti, J. Rouquerol, and T. Siemieniewska, Pure Appl. Chem., 57, 603 (1985) https://doi.org/10.1351/pac198557040603