The influence of Fe on the formation of titanosilicate ETS-4
authors Craveiro, R; Lin, Z
nationality International
journal JOURNAL OF SOLID STATE CHEMISTRY
author keywords ETS-4; Titanosilicate; Iron silicate; Raman
keywords MOLECULAR-SIEVES; CATALYTIC-REDUCTION; IRON; FRAMEWORK; SILICATE; FE-ZSM-5; SPECTROSCOPY; ADSORPTION; AMMONIA; N2O
abstract ETS-4 has potential applications for the size-selective adsorption and ion exchange. Iron substituted ETS-4 has been hydrothermally synthesized. The incorporation with different amount of iron has been achieved to produce Fe-ETS-4(x) (x=5-13), which shows the flexibility for iron substitution. Low amount of iron in precursor does not disturb the formation of ETS-4. The existence of iron was confirmed by EDS. Direct comparison between in-situ synthesized and iron exchanged samples suggested that iron in former ones does not exist in pore. The iron in the pore of ETS-4 would significantly shift the Si-29 MAS NMR resonance upfield. While in-situ synthesized Fe-ETS-4(x) samples present very similar FTIR and Raman spectra, TG and DSC curves to ETS-4, the iron exchanged ones are clear shifted. The thermal stability of in-situ synthesized Fe-ETS-4(x) samples is very similar to the parent phase, much better than that of iron exchanged one. (C) 2012 Elsevier Inc. All rights reserved.
publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
issn 0022-4596
year published 2012
volume 190
beginning page 162
ending page 168
digital object identifier (doi) 10.1016/j.jssc.2012.02.037
web of science category Chemistry, Inorganic & Nuclear; Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000304282300026
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journal impact factor 2.179
5 year journal impact factor 2.130
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