The effect of silane modification on the adsorptive properties of natural pyrophyllite and synthetic titanium-based powders prepared by the sol-gel process

Sener S., Erdemoglu M., Asilturk M., Sayilkan H.

TURKISH JOURNAL OF CHEMISTRY, cilt.29, sa.5, ss.487-495, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 5
  • Basım Tarihi: 2005
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.487-495
  • Anahtar Kelimeler: aminosilane coupling agents, surface modification, 4-nitrophenol, adsorption, HYDROLYSIS-CONDENSATION REACTIONS, SCIENCE-AND-TECHNOLOGY, HEAVY-METAL IONS, PRECIPITATED SILICAS, SURFACE MODIFICATION, AQUEOUS-SOLUTIONS, COUPLING AGENT, ADSORBENTS, REMOVAL, 3-AMINOPROPYLTRIETHOXYSILANE
  • İnönü Üniversitesi Adresli: Evet

Özet

Our aim was to improve the relatively poor adsorption characteristics of natural pyrophyllite and those of TiOm and Ti(OR)(x)(OH)(y)(O)(z) obtained from titanium tetraisopropoxide (TTIP) by the sol-gel process. For this purpose, the surfaces of the above-mentioned adsorbents were coated with a surface modifier by dipping them in 1% and 50% (w/w) solutions of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (DIAMO) in methanol. Realization of the coating processes was checked by FT-IR and SEM analyses. FT-IR analyses of the coated powders heat treated at 110 degrees C showed that condensation took place between OH groups of prehydrolyzed silane molecules and-hydroxyl groups and/or oxygen atoms on the surface of the powders, ensuring the attachment of the silane molecules to the surface.