Synthesis, characterization and catalytic testing of a 3-D mesoporous titanosilica, Ti-TUD-1

Z. Shan; J. C. Jansen; L. Marchese; Th Maschmeyer

doi:10.1016/S1387-1811(01)00342-0

Synthesis, characterization and catalytic testing of a 3-D mesoporous titanosilica, Ti-TUD-1

Z. Shan, J. C. Jansen, L. Marchese, Th Maschmeyer

Department of Science and Technological Innovation

Research output: Contribution to journal › Article › peer-review

Abstract

An active and stable mesoporous titanosilica, denoted as Ti-TUD-1, has been synthesized using a cheap, small and multifunctional chemical, triethanolamine (TEA), instead of surfactants. TEA not only is applied as a mesopore template and as director of positioning Ti-sites onto the internal mesopore surface via the formation of titanium-TEA complexes, but also stabilizes titanium sources, which ensures the possibility of forming isolated tetrahedrally coordinated Ti-sites. Ti-sites. Ti-TUD-1 features three-dimensionally randomly connected mesopores with walls of about 2.5-4 nm in thickness. Its surface area can reach about 700-1000 m²/g and its pore sizes are tunable. After calcination at 1000°C and boiling in water, it kept a high integrity, a high surface area and only a slight change in pore sizes occured. UV-VIS spectra revealed that tetrahedrally co-ordinated Ti-sites are quite stable under thermal and hydrothermal treatments. It also showed about 5.6 times higher activity for cyclohexene epoxidation than the framework-substituted Ti-MCM-41 and similar activity compared to Ti-grafted MCM-41.

Original language	English
Pages (from-to)	181-187
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	48
Issue number	1-3
DOIs	https://doi.org/10.1016/S1387-1811(01)00342-0
Publication status	Published - Nov 2001

Keywords

Epoxidation
Mesoporosity
Non-surfactant
Template synthesis
Titanosilica

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10.1016/S1387-1811(01)00342-0

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title = "Synthesis, characterization and catalytic testing of a 3-D mesoporous titanosilica, Ti-TUD-1",

abstract = "An active and stable mesoporous titanosilica, denoted as Ti-TUD-1, has been synthesized using a cheap, small and multifunctional chemical, triethanolamine (TEA), instead of surfactants. TEA not only is applied as a mesopore template and as director of positioning Ti-sites onto the internal mesopore surface via the formation of titanium-TEA complexes, but also stabilizes titanium sources, which ensures the possibility of forming isolated tetrahedrally coordinated Ti-sites. Ti-sites. Ti-TUD-1 features three-dimensionally randomly connected mesopores with walls of about 2.5-4 nm in thickness. Its surface area can reach about 700-1000 m2/g and its pore sizes are tunable. After calcination at 1000°C and boiling in water, it kept a high integrity, a high surface area and only a slight change in pore sizes occured. UV-VIS spectra revealed that tetrahedrally co-ordinated Ti-sites are quite stable under thermal and hydrothermal treatments. It also showed about 5.6 times higher activity for cyclohexene epoxidation than the framework-substituted Ti-MCM-41 and similar activity compared to Ti-grafted MCM-41.",

keywords = "Epoxidation, Mesoporosity, Non-surfactant, Template synthesis, Titanosilica",

author = "Z. Shan and Jansen, {J. C.} and L. Marchese and Th Maschmeyer",

note = "Funding Information: This work was supported by ABB Lummus Global Inc., USA. Thanks to Mr. J. Groen, DelftChemTech, Delft University of Technology, for the porosity measurements. ",

year = "2001",

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doi = "10.1016/S1387-1811(01)00342-0",

language = "English",

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pages = "181--187",

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T1 - Synthesis, characterization and catalytic testing of a 3-D mesoporous titanosilica, Ti-TUD-1

AU - Shan, Z.

AU - Jansen, J. C.

AU - Marchese, L.

AU - Maschmeyer, Th

N1 - Funding Information: This work was supported by ABB Lummus Global Inc., USA. Thanks to Mr. J. Groen, DelftChemTech, Delft University of Technology, for the porosity measurements.

PY - 2001/11

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N2 - An active and stable mesoporous titanosilica, denoted as Ti-TUD-1, has been synthesized using a cheap, small and multifunctional chemical, triethanolamine (TEA), instead of surfactants. TEA not only is applied as a mesopore template and as director of positioning Ti-sites onto the internal mesopore surface via the formation of titanium-TEA complexes, but also stabilizes titanium sources, which ensures the possibility of forming isolated tetrahedrally coordinated Ti-sites. Ti-sites. Ti-TUD-1 features three-dimensionally randomly connected mesopores with walls of about 2.5-4 nm in thickness. Its surface area can reach about 700-1000 m2/g and its pore sizes are tunable. After calcination at 1000°C and boiling in water, it kept a high integrity, a high surface area and only a slight change in pore sizes occured. UV-VIS spectra revealed that tetrahedrally co-ordinated Ti-sites are quite stable under thermal and hydrothermal treatments. It also showed about 5.6 times higher activity for cyclohexene epoxidation than the framework-substituted Ti-MCM-41 and similar activity compared to Ti-grafted MCM-41.

AB - An active and stable mesoporous titanosilica, denoted as Ti-TUD-1, has been synthesized using a cheap, small and multifunctional chemical, triethanolamine (TEA), instead of surfactants. TEA not only is applied as a mesopore template and as director of positioning Ti-sites onto the internal mesopore surface via the formation of titanium-TEA complexes, but also stabilizes titanium sources, which ensures the possibility of forming isolated tetrahedrally coordinated Ti-sites. Ti-sites. Ti-TUD-1 features three-dimensionally randomly connected mesopores with walls of about 2.5-4 nm in thickness. Its surface area can reach about 700-1000 m2/g and its pore sizes are tunable. After calcination at 1000°C and boiling in water, it kept a high integrity, a high surface area and only a slight change in pore sizes occured. UV-VIS spectra revealed that tetrahedrally co-ordinated Ti-sites are quite stable under thermal and hydrothermal treatments. It also showed about 5.6 times higher activity for cyclohexene epoxidation than the framework-substituted Ti-MCM-41 and similar activity compared to Ti-grafted MCM-41.

KW - Epoxidation

KW - Mesoporosity

KW - Non-surfactant

KW - Template synthesis

KW - Titanosilica

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Synthesis, characterization and catalytic testing of a 3-D mesoporous titanosilica, Ti-TUD-1

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Keywords

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