Hydrophobic fluorinated TiO2-ZrO2 as catalyst in epoxidation of 1-octene with aqueous hydrogen peroxide

Hadi Nur; Yun Hau Ng Yun Hau; null Izan Izwan Misnon; Halimaton Hamdan; null Mohd Nazlan Mohd Muhid

doi:10.1016/j.matlet.2005.12.139

Hydrophobic fluorinated TiO₂-ZrO₂ as catalyst in epoxidation of 1-octene with aqueous hydrogen peroxide

Hadi Nur^*, Yun Hau Ng Yun Hau, Izan Izwan Misnon, Halimaton Hamdan, Mohd Nazlan Mohd Muhid

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

28 Citations (Scopus)

Abstract

A new heterogeneous oxidation catalyst was prepared by impregnation of TiO₂ from titanium(IV)tetra-2-propoxide on the surface of ZrO₂. The surfaces of TiO₂-ZrO₂ particles were then modified by the fluorination of ammonium hexafluorosilicate and followed by alkylsilylation of n-octadecyltrichlorosilane (OTS). The resulting catalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption isotherm, UV-Vis Diffuse Reflectance (UV-Vis DR), and Energy Dispersive X-Ray Analysis (EDAX) techniques. The catalytic potential of catalysts for oxidation reactions has been verified in the liquid phase epoxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. It is demonstrated that the fluorination and alkylsilylation enhance the catalytic activity of TiO₂-ZrO₂. A high catalytic activity of the modified TiO₂-ZrO₂ was related to the modification of the local environment of titanium active site and increasing the hydrophobicity of catalyst particles by fluorination and alkylsilylation.

Original language	English
Pages (from-to)	2274-2277
Journal	Materials Letters
Volume	60
Issue number	17-18
Online published	23 Jan 2006
DOIs	https://doi.org/10.1016/j.matlet.2005.12.139
Publication status	Published - Aug 2006
Externally published	Yes

Research Keywords

Alkylsilylation
Epoxidation
Fluorination
Hydrophobic fluorinated TiO2-ZrO2

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@article{1f48cf919eea41f79ee4929be8c7891f,

title = "Hydrophobic fluorinated TiO2-ZrO2 as catalyst in epoxidation of 1-octene with aqueous hydrogen peroxide",

abstract = "A new heterogeneous oxidation catalyst was prepared by impregnation of TiO2 from titanium(IV)tetra-2-propoxide on the surface of ZrO2. The surfaces of TiO2-ZrO2 particles were then modified by the fluorination of ammonium hexafluorosilicate and followed by alkylsilylation of n-octadecyltrichlorosilane (OTS). The resulting catalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption isotherm, UV-Vis Diffuse Reflectance (UV-Vis DR), and Energy Dispersive X-Ray Analysis (EDAX) techniques. The catalytic potential of catalysts for oxidation reactions has been verified in the liquid phase epoxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. It is demonstrated that the fluorination and alkylsilylation enhance the catalytic activity of TiO2-ZrO2. A high catalytic activity of the modified TiO2-ZrO2 was related to the modification of the local environment of titanium active site and increasing the hydrophobicity of catalyst particles by fluorination and alkylsilylation. ",

keywords = "Alkylsilylation, Epoxidation, Fluorination, Hydrophobic fluorinated TiO2-ZrO2",

author = "Hadi Nur and {Ng Yun Hau}, {Yun Hau} and {Izan Izwan Misnon} and Halimaton Hamdan and {Mohd Nazlan Mohd Muhid}",

year = "2006",

month = aug,

doi = "10.1016/j.matlet.2005.12.139",

language = "English",

volume = "60",

pages = "2274--2277",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Hydrophobic fluorinated TiO2-ZrO2 as catalyst in epoxidation of 1-octene with aqueous hydrogen peroxide

AU - Nur, Hadi

AU - Ng Yun Hau, Yun Hau

AU - Izan Izwan Misnon, null

AU - Hamdan, Halimaton

AU - Mohd Nazlan Mohd Muhid, null

PY - 2006/8

Y1 - 2006/8

N2 - A new heterogeneous oxidation catalyst was prepared by impregnation of TiO2 from titanium(IV)tetra-2-propoxide on the surface of ZrO2. The surfaces of TiO2-ZrO2 particles were then modified by the fluorination of ammonium hexafluorosilicate and followed by alkylsilylation of n-octadecyltrichlorosilane (OTS). The resulting catalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption isotherm, UV-Vis Diffuse Reflectance (UV-Vis DR), and Energy Dispersive X-Ray Analysis (EDAX) techniques. The catalytic potential of catalysts for oxidation reactions has been verified in the liquid phase epoxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. It is demonstrated that the fluorination and alkylsilylation enhance the catalytic activity of TiO2-ZrO2. A high catalytic activity of the modified TiO2-ZrO2 was related to the modification of the local environment of titanium active site and increasing the hydrophobicity of catalyst particles by fluorination and alkylsilylation.

AB - A new heterogeneous oxidation catalyst was prepared by impregnation of TiO2 from titanium(IV)tetra-2-propoxide on the surface of ZrO2. The surfaces of TiO2-ZrO2 particles were then modified by the fluorination of ammonium hexafluorosilicate and followed by alkylsilylation of n-octadecyltrichlorosilane (OTS). The resulting catalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption isotherm, UV-Vis Diffuse Reflectance (UV-Vis DR), and Energy Dispersive X-Ray Analysis (EDAX) techniques. The catalytic potential of catalysts for oxidation reactions has been verified in the liquid phase epoxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. It is demonstrated that the fluorination and alkylsilylation enhance the catalytic activity of TiO2-ZrO2. A high catalytic activity of the modified TiO2-ZrO2 was related to the modification of the local environment of titanium active site and increasing the hydrophobicity of catalyst particles by fluorination and alkylsilylation.

KW - Alkylsilylation

KW - Epoxidation

KW - Fluorination

KW - Hydrophobic fluorinated TiO2-ZrO2

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U2 - 10.1016/j.matlet.2005.12.139

DO - 10.1016/j.matlet.2005.12.139

M3 - RGC 21 - Publication in refereed journal

SN - 0167-577X

VL - 60

SP - 2274

EP - 2277

JO - Materials Letters

JF - Materials Letters

IS - 17-18

ER -