A study on the synthesis of spherical colloidal TPA-silicalite-1 using acidic promoters

M. H. Kim, M. Lee, I. M. Kang, Yun Goo Song, W. Jones

Research output: Contribution to journalArticle

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Abstract

Discrete spherical colloidal TPA-silicalite-1 with the gel composition 1.0TPAOH:3.0SiO2:100H2O:xPromoter (Promoter= H 2SO4, HCl, HNO3 and NH4OH, x=0-0.5) has been synthesized at 100°C. The spherical compounds modified as functions of acidic species and added promoter amount were fully investigated using PXRD, SEM, Light scattering, Zeta potential and 29Si solid NMR. The mean sizes of H2SO4 -induced TPA-silicalite-1 were ranged from 200 to 500nm and agreed with the results of the light scattering. The spherical morphology of the TPA-silicalite-1 was compared with a typical silicalite-1 with multiple twins and hillock. These facts suggest acidic promoter addition in TPA-silicalite enhanced the interaction of TPA+ and the silica source, leading the effect of nucleation and crystallization, and led the preferred orientation of crystal growth due to regulate the shape of TPA-silicalite-1.

Original languageEnglish
Pages (from-to)319-326
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume158 A
Publication statusPublished - 2005 Jan 1

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Crystallization
Light scattering
light scattering
Zeta potential
synthesis
Crystal growth
Silicon Dioxide
Crystal orientation
crystal growth
Nucleation
Gels
Silica
Nuclear magnetic resonance
nucleation
gels
crystallization
silicon dioxide
nuclear magnetic resonance
Scanning electron microscopy
scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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abstract = "Discrete spherical colloidal TPA-silicalite-1 with the gel composition 1.0TPAOH:3.0SiO2:100H2O:xPromoter (Promoter= H 2SO4, HCl, HNO3 and NH4OH, x=0-0.5) has been synthesized at 100°C. The spherical compounds modified as functions of acidic species and added promoter amount were fully investigated using PXRD, SEM, Light scattering, Zeta potential and 29Si solid NMR. The mean sizes of H2SO4 -induced TPA-silicalite-1 were ranged from 200 to 500nm and agreed with the results of the light scattering. The spherical morphology of the TPA-silicalite-1 was compared with a typical silicalite-1 with multiple twins and hillock. These facts suggest acidic promoter addition in TPA-silicalite enhanced the interaction of TPA+ and the silica source, leading the effect of nucleation and crystallization, and led the preferred orientation of crystal growth due to regulate the shape of TPA-silicalite-1.",
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A study on the synthesis of spherical colloidal TPA-silicalite-1 using acidic promoters. / Kim, M. H.; Lee, M.; Kang, I. M.; Song, Yun Goo; Jones, W.

In: Studies in Surface Science and Catalysis, Vol. 158 A, 01.01.2005, p. 319-326.

Research output: Contribution to journalArticle

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AU - Kim, M. H.

AU - Lee, M.

AU - Kang, I. M.

AU - Song, Yun Goo

AU - Jones, W.

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AB - Discrete spherical colloidal TPA-silicalite-1 with the gel composition 1.0TPAOH:3.0SiO2:100H2O:xPromoter (Promoter= H 2SO4, HCl, HNO3 and NH4OH, x=0-0.5) has been synthesized at 100°C. The spherical compounds modified as functions of acidic species and added promoter amount were fully investigated using PXRD, SEM, Light scattering, Zeta potential and 29Si solid NMR. The mean sizes of H2SO4 -induced TPA-silicalite-1 were ranged from 200 to 500nm and agreed with the results of the light scattering. The spherical morphology of the TPA-silicalite-1 was compared with a typical silicalite-1 with multiple twins and hillock. These facts suggest acidic promoter addition in TPA-silicalite enhanced the interaction of TPA+ and the silica source, leading the effect of nucleation and crystallization, and led the preferred orientation of crystal growth due to regulate the shape of TPA-silicalite-1.

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