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Synthesis of Nanosized TiO2-Ag-SiO2 Sols by Modified Sol-Gel Method and their Application for Methane Hydrate Formation

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Abstract:

Nanosized TiO2-Ag-SiO2 sols were prepared with modified sol-gel method using reduction agent. The physical properties of the prepared particles were investigated by TEM, XRD and FT-IR. The titanium tetraisopropoxide (TTIP, 98% Aldrich), teraethylorthosilicate (TEOS, 98% Aldrich) and silver nitrate were used as precursors of titania, silica and silver, respectively. Sodium citrate tribasic dihydrate (C6H5Na3.2H2O, Aldrich) was used as a reduction agent. This paper presents the effect of nanosized TiO2-Ag-SiO2 sols on the formation of methane hydrate in a semi-batch vessel. The micrographs of TEM showed that the TiO2-Ag-SiO2 particles possessed a spherical morphology with a narrow size distribution. The crystallite size of particles decreased with an increasing the SiO2 content. In addition, the water solution with 1.0 wt% of TiO2-Ag-SiO2 particles acted as promoter for methane hydrate formation.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

1059-1062

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.1059

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Online since:

June 2007

Authors:

Ju Dong Lee, Hyoung Chan Kim, Young Seok Kim, Yang Do Kim, Man Sig Lee

Keywords:

Methane Hydrate, Nanosized TiO2-Ag-SiO2 Sol, Promoter, Sol-Gel Method

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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