Article ID Journal Published Year Pages File Type
76927 Microporous and Mesoporous Materials 2006 6 Pages PDF
Abstract

In this work, we studied the structural change of microporous titanosilicate ETS-10 upon post-treatment with nitric acid using X-ray photoelectron spectroscopy (XPS) technique. The experimental results demonstrated that significant leaching of Ti species from the surface of ETS-10 occurred upon acid washing; in the meantime the equilibrium pH of the acidification solution was lowered. Analysis of the Ti 2p and O 1s XPS spectra of the acid-treated ETS-10 samples revealed the formation of tetrahedral Ti species due to Ti leaching from the –O–Ti–O–Ti–O– chains of ETS-10 framework, suggesting that the –O–Ti–O–Ti–O– chains are very sensitive to an acidic environment.

Related Topics
Physical Sciences and Engineering Chemical Engineering Catalysis
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