Colloid and Polymer Science

, Volume 271, Issue 7, pp 709–713 | Cite as

Effect of preparation pH on pore structure of silica gels

  • S. Ülkü
  • D. Balköse
  • H. Baltacboğlu
Original Contributions

Abstract

Surface characterization of silica gels prepared at different gelation pH from water glass and sulphuric acid were made by argon adsorption at 77 K using continuous volumetric method. While microporous silica gels prepared in the pH range of 1–3 had BET surface areas of 504–571 m2 g−1, total pore volumes of 0.26–0.31 cm3 g−1 and micropore volumes of 0.16–0.23 cm3 g−1, mesoporous silica gels prepared in the pH range of 3.36–0.65 had BET surface areas of 374–530 m2 g−1 and pore volumes of 0.61–0.79 cm3 g−1.

Key words

Water glass silica gel argon adsorption microporous 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Balköse D (1990) J Chem Tech Biotechnol 49:165Google Scholar
  2. 2.
    Iler RK (1979) The Chemistry of Silica. John Wiley, New York, p 518Google Scholar
  3. 3.
    Kenny MB, Sing KSW (1990) In press, ACS-Iler Symposium Pro., WashingtonGoogle Scholar
  4. 4.
    Rao KS, Nayar BC (1978) Ind J Chem 16:120Google Scholar
  5. 5.
    Coudrier M, Baudru B, Donnet JB (1971) Bulletin de La Societe Chimique de France 9:3154Google Scholar
  6. 6.
    Ro JC, Chung IJ (1991) J of Non-Crystalline Solids 130:8Google Scholar
  7. 7.
    Pal IB, Saran T, Ramachandron LV, Mukherjee PN (1984) Fuel Science and Technology 3:27Google Scholar
  8. 8.
    Vogelsberger W, Shütze D, Rudakoff G (1987) Silikattechnic 38:3Google Scholar
  9. 9.
    Gregg GJ, Sing KSW (1982) Adsorption, Surface Area and Porosity. Academic Press, London, p 74Google Scholar
  10. 10.
    Robens E, Müller U, Unger KK (1989) Thermochimicia Acta 152:145Google Scholar
  11. 11.
    Winyall ME (1984) Applied Industrial Catalysis 3:43Google Scholar
  12. 12.
    Sing KSW (1989) Colloids and Surfaces 38:113Google Scholar
  13. 13.
    Carrot PSM, Sing KSW (1988) In: Unger KK (ed) Characterization of Porous Solids. Elsevier Science Pub, Amsterdam, p 77Google Scholar
  14. 14.
    Gregg SJ, Sing KJW (1982) Adsorption, Surface Area and Porosity. Academic Press, London, p 214Google Scholar
  15. 15.
    Horvath G, Kawazoe K (1983) J Chemical Engineering Japan 16:470Google Scholar
  16. 16.
    Coulter Omnisorp Manual (1991) Corporate Communications, FL, p 109Google Scholar

Copyright information

© Steinkopff Verlag 1993

Authors and Affiliations

  • S. Ülkü
    • 1
  • D. Balköse
    • 1
  • H. Baltacboğlu
    • 1
  1. 1.Faculty of Engineering, Department of Chemical EngineeringEge UniversityBoronova-IzmirTurkey

Personalised recommendations