Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
권호 표지
DOI QR코드

DOI QR Code

Surface Modification of MgO Microcrystals by Cycles of Hydration-Dehydration

  • Published : 1999.07.20
Download PDF
⟨ Previous Next ⟩

Abstract

Relatively inert surface of microcrystalline MgO was modified into chemically active one by carrying out controlled hydration followed by dehydration at elevated temperature under dynamic vacuum. Even though the treatment by the first cycle of hydration-dehydration did not alter the porosity of MgO, it largely enhanced surface reactivity of the MgO toward adsorbed water, turning its outer layer into brucite upon rehydration. Treatment by the second cycle of hydration-dehydration generated micropores, and slit-shaped mesopores, raising the porosity of the MgO. The overlayer of Fe2O3 of the core/shell type composite magnesium oxide enhanced this surface modification, turning its surface into more porous and more active one than that of uncoated MgO, after the treatment by the hydration-dehydration.

Keywords

References

  1. Current Opinion in Solid State & Materials Science v.1 Gillan, M. J.;Kantorovich, L. N.;Lidan, P. J. D.
  2. Surface Science v.175 Causaa, M.;Dovesi, R.;Pisani, C.;Roetti, C.
  3. J. Chem. Phys. v.99 Scamehorn, C. A.;Hess, A. C.;McCarthy, M. I.
  4. Surface Science v.320 Pugh, S.;Gillan, M. J.
  5. J. Chem. Phys. v.101 Scamehorn, C. A.;Harrison, N. M.;McCarthy, M. I.
  6. J. Chem. Phys. v.103 Langel, W. L.;Parrinello, M.
  7. Surface Science v.343 Kantorovich, L. N.;Holender, J. M.;Gillan, M. J.
  8. Surface Science v.336 Nada, R.;Hess, A. C.;Pisani, C.
  9. J. Chem. Soc., Faraday Trans.Ⅰ v.75 Coluccia, S.;Tench, A. J.;Segall, R. L.
  10. Surface Science v.134 Urano, T.;Kanaji, T.
  11. Surface Science v.191 Onishi, H.;Egawa, C.;Aruga, T.;Iwasawa, Y.
  12. Langmuir v.1 Lin, S. -T.;Klabunde, K. J.
  13. Langmuri v.7 Li, Y. -X.;Klabunde, K. J.
  14. J. Chem. Mater. v.4 Li, Y. 0X.;Koper, O.;Atteya, M.;Klabunde, K. J.
  15. High Temp. Mater. Sci. v.33 Klabunde, K. J.;Khaleel, A.;Park, D.
  16. Chem. Mater. v.8 Stark, J. V.;Park, D. G.;Lagdi, I.;Klabunde, K. J.
  17. J. Phys. Chem. v.100 Klabunde, K. J.;Stark, J.;Koper, O.;Mohs, C.;Park, D. G.;Decker, S.;Jiang, Y.;Lagadic, I.;Zhng, D.
  18. Bull. Korean Chem. Soc. v.18 Kim, H. J.;Kang, J.;Park, D. G.;Kweon, H. -J.;Klabunde, K. J.
  19. J. Chem. Soc., Faraday Trans. v.87 Carrott, M. R.;Carrott, P.;de Carvalho, M. B.
  20. Powder Surface Area and Porosity(3rd Ed.) Lowell, S.;Shields, J. E.
  21. J. Catal. v.52 Johnson, M. F. L.
  22. Chem. Mater. v.5 Itoh, H.;Utamapanya, S.;Stark, J.;Klabunde, K. J.;Schlup, J. R.
  23. Chem. Soc., Faraday Trans. v.89 Carrott, M. R.;Carrott, P.;de Carvalho, M. B.;Sking, K. S. W.
  24. J. Mater Sci. v.18 Green, J.
  25. J. Am. Ceram. Soc. v.70 Kim, M. G.;Dahmen, U.;Searcy, A. W.
  26. J. Am. Ceram. Soc. v.70 Beruto, D.;Botter, R.;Searcy, A. W.
  27. Adsorption, Surface area and Porosity(2nd Ed.) Gregg, S. J.;Sing, K. S. W.