The Effect of Silane Modification on the Adsorptive Properties of Natural Pyrophyllite and Synthetic Titanium-Based Powders Prepared by the Sol-Gel Process

Şadiye ŞENER; Murat ERDEMOĞLU; Meltem ASİLTÜRK

Makale detayları

The Effect of Silane Modification on the Adsorptive Properties of Natural Pyrophyllite and Synthetic Titanium-Based Powders Prepared by the Sol-Gel Process

Yazarlar:

Şadiye ŞENER | Murat ERDEMOĞLU | Meltem ASİLTÜRK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2005 Vol.29 Issue 5, pp.487-495

Belge Tipi:

Makale

Yayın Tarihi:

4/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000729029

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

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 °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.    Adsorption properties of coated and uncoated adsorbents were compared.   Adsorption percentage of natural pyrophyllite was 46.35% for  4-nitrophenol (4-NP) in aqueous solution, whereas 1% and 50%  amino-coated pyrophyllite displayed 52.14% and 73.84% adsorption,  respectively.  The highest adsorption of 4-NP was realized when the  calcinated powder obtained from the hydrolysis-condensation product of  TTIP was coated with DIAMO from 50% solution.

 

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 °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.    Adsorption properties of coated and uncoated adsorbents were compared.   Adsorption percentage of natural pyrophyllite was 46.35% for  4-nitrophenol (4-NP) in aqueous solution, whereas 1% and 50%  amino-coated pyrophyllite displayed 52.14% and 73.84% adsorption,  respectively.  The highest adsorption of 4-NP was realized when the  calcinated powder obtained from the hydrolysis-condensation product of  TTIP was coated with DIAMO from 50% solution.

Makale detayları

The Effect of Silane Modification on the Adsorptive Properties of Natural Pyrophyllite and Synthetic Titanium-Based Powders Prepared by the Sol-Gel Process

Yazarlar: Şadiye ŞENER | Murat ERDEMOĞLU | Meltem ASİLTÜRK

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2005 Vol.29 Issue 5, pp.487-495

Belge Tipi: Makale

Yayın Tarihi: 4/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000729029

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Şadiye ŞENER | Murat ERDEMOĞLU | Meltem ASİLTÜRK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2005 Vol.29 Issue 5, pp.487-495

Belge Tipi:

Makale

Yayın Tarihi:

4/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000729029

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527