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Title: Preparation of monodispersed microporous SiO{sub 2} microspheres with high specific surface area using dodecylamine as a hydrolysis catalyst

Abstract

A novel and simple method for the synthesis of monodispersed microporous SiO{sub 2} microspheres with high specific surface area was developed by hydrolysis of tetraethoxysilane (TEOS) in a water-ethanol mixed solution and using dodecylamine (DDA) as hydrolysis catalyst and template. The as-prepared products were characterized with differential thermal analysis-thermogravimetry, scanning electron microscopy, high-resolution transmission electron microscopy, small angle X-ray diffraction and nitrogen adsorption. The effects of experimental conditions including hydrolysis temperatures, calcination temperature and concentrations of TEOS and DDA on the morphology and pore parameters of the as-prepared SiO{sub 2} microspheres were investigated and discussed. The results showed that hydrolysis temperature and concentrations of TEOS and DDA are important parameters for the control of size and morphology of particles. The specific surface area and specific pore volume of the as-prepared SiO{sub 2} microspheres increased with increasing DDA concentration and calcination temperature. DDA may act not only as a good hydrolysis catalyst but also as a template for the formation of monodispersed SiO{sub 2} microspheres with high specific surface area. This research may provide new insight into the synthesis of monodispersed microporous SiO{sub 2} microspheres. -- Graphical abstract: Monodispersed microporous SiO{sub 2} microspheres with high specific surface area were prepared bymore » hydrolysis of tetraethoxysilane (TEOS) using dodecylamine (DDA) as hydrolysis catalyst and the effects of experimental conditions on the morphology and pore parameters of the as-prepared SiO{sub 2} microspheres were investigated and discus0009s.« less

Authors:
 [1];  [2];  [2]
  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi road 122, Wuhan 430070 (China). E-mail: jiaguoyu@yahoo.com
  2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi road 122, Wuhan 430070 (China)
Publication Date:
OSTI Identifier:
20784853
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 179; Journal Issue: 1; Other Information: DOI: 10.1016/j.jssc.2005.10.036; PII: S0022-4596(05)00491-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CALCINATION; DIFFERENTIAL THERMAL ANALYSIS; HYDROLYSIS; MICROSPHERES; SCANNING ELECTRON MICROSCOPY; SILICON OXIDES; SPECIFIC SURFACE AREA; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Yu Jiaguo, Zhao Li, and Cheng Bei. Preparation of monodispersed microporous SiO{sub 2} microspheres with high specific surface area using dodecylamine as a hydrolysis catalyst. United States: N. p., 2006. Web.
Yu Jiaguo, Zhao Li, & Cheng Bei. Preparation of monodispersed microporous SiO{sub 2} microspheres with high specific surface area using dodecylamine as a hydrolysis catalyst. United States.
Yu Jiaguo, Zhao Li, and Cheng Bei. Sun . "Preparation of monodispersed microporous SiO{sub 2} microspheres with high specific surface area using dodecylamine as a hydrolysis catalyst". United States. doi:.
@article{osti_20784853,
title = {Preparation of monodispersed microporous SiO{sub 2} microspheres with high specific surface area using dodecylamine as a hydrolysis catalyst},
author = {Yu Jiaguo and Zhao Li and Cheng Bei},
abstractNote = {A novel and simple method for the synthesis of monodispersed microporous SiO{sub 2} microspheres with high specific surface area was developed by hydrolysis of tetraethoxysilane (TEOS) in a water-ethanol mixed solution and using dodecylamine (DDA) as hydrolysis catalyst and template. The as-prepared products were characterized with differential thermal analysis-thermogravimetry, scanning electron microscopy, high-resolution transmission electron microscopy, small angle X-ray diffraction and nitrogen adsorption. The effects of experimental conditions including hydrolysis temperatures, calcination temperature and concentrations of TEOS and DDA on the morphology and pore parameters of the as-prepared SiO{sub 2} microspheres were investigated and discussed. The results showed that hydrolysis temperature and concentrations of TEOS and DDA are important parameters for the control of size and morphology of particles. The specific surface area and specific pore volume of the as-prepared SiO{sub 2} microspheres increased with increasing DDA concentration and calcination temperature. DDA may act not only as a good hydrolysis catalyst but also as a template for the formation of monodispersed SiO{sub 2} microspheres with high specific surface area. This research may provide new insight into the synthesis of monodispersed microporous SiO{sub 2} microspheres. -- Graphical abstract: Monodispersed microporous SiO{sub 2} microspheres with high specific surface area were prepared by hydrolysis of tetraethoxysilane (TEOS) using dodecylamine (DDA) as hydrolysis catalyst and the effects of experimental conditions on the morphology and pore parameters of the as-prepared SiO{sub 2} microspheres were investigated and discus0009s.},
doi = {},
journal = {Journal of Solid State Chemistry},
number = 1,
volume = 179,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}