Please use this identifier to cite or link to this item:
|Title:||A reinforced study on the synthesis of microporous titanosilicate ETS-10||Authors:||Lv, L.
|Keywords:||Crystal growth mechanism
Microporous titanosilicate ets-10
|Issue Date:||1-Dec-2004||Citation:||Lv, L., Su, F., Zhao, X.S. (2004-12-01). A reinforced study on the synthesis of microporous titanosilicate ETS-10. Microporous and Mesoporous Materials 76 (1-3) : 113-122. ScholarBank@NUS Repository. https://doi.org/10.1016/j.micromeso.2004.08.004||Abstract:||This work was aimed at unifying the synthesis recipe, identifying the most appropriate titanium precursor, and elucidating the formation mechanism of microporous titanosilicate ETS-10. To achieve these aims, the effects of titanium sources that had been and have not been studied in the literature, fiuoride ions, pH of synthesis gel, contents of water, Na+ and K + ions in the synthesis gels, SiO2/TiO2 molar ratios, and synthesis time and temperature on the crystallization of ETS-10 were systematically examined. It was observed that nano-sized Degussa titanium dioxide (commercially known as P25) is the best titanium source, with which highly pure ETS-10 can be synthesized from an optimized synthesis system of 3.4Na2O-1.5K2O-TiO2-xSiO2-yH 2O (where x = 4.5-5.5 and y = 150-180) at pH 10.4 without the presence of seeds or organic template. It was noted that the presence of K + ions in the synthesis gels favors the formation of pure ETS-10, most probably due to the structure-directing role of K+ ions. It was identified that F- ions is not essential to the crystallization of ETS-10. Instead, the presence of F- ions has an adverse effect, resulting in the formation of quartz impurity. The crystallization kinetics of ETS-10 in the optimized synthesis system was investigated at 180, 200, 230 and 250°C. A modified Avrami-Erofeev equation was fitted to the experimental data. The apparent activation energy of crystallization was calculated to be 89kJ/mol. © 2004 Elsevier Inc. All rights reserved.||Source Title:||Microporous and Mesoporous Materials||URI:||http://scholarbank.nus.edu.sg/handle/10635/88476||ISSN:||13871811||DOI:||10.1016/j.micromeso.2004.08.004|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 2, 2020
WEB OF SCIENCETM
checked on Jul 2, 2020
checked on Jun 28, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.