银交换的ETS-10和丝光沸石分子筛的X射线光电子能谱表征

XPS characterization of silver exchanged ETS-10 and mordenite molecular sieves.

作者信息

Anson A, Maham Y, Lin C C H, Kuznicki T M, Kuznicki S M

机构信息

Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 266, Canada.

出版信息

J Nanosci Nanotechnol. 2009 May;9(5):3134-7. doi: 10.1166/jnn.2009.044.

DOI:10.1166/jnn.2009.044

PMID:19452980

Abstract

Silver exchanged molecular sieves ETS-10 (Ag-ETS-10) and mordenite (Ag-mordenite) were dehydrated under vacuum at temperatures between 100 degrees C-350 degrees C. Changes in the state of the silver were studied using X-ray photoelectron spectroscopy (XPS). Silver cations in titanosilicate Ag-ETS-10 are fully reduced to Ag(0) at temperatures as low as 150 degrees C. The characteristic features of the XPS spectrum of silver in this Ag-ETS-10 species correspond to only metallic silver. The signal for metallic silver is not observed in the XPS spectrum of aluminosilicate Ag-mordenite, indicating that silver cations are not reduced, even after heating to 350 degrees C.

摘要

银交换分子筛ETS-10（Ag-ETS-10）和丝光沸石（Ag-丝光沸石）在100℃至350℃的温度下真空脱水。使用X射线光电子能谱（XPS）研究银状态的变化。钛硅酸盐Ag-ETS-10中的银阳离子在低至150℃的温度下完全还原为Ag(0)。该Ag-ETS-10物种中银的XPS光谱特征仅对应于金属银。在铝硅酸盐Ag-丝光沸石的XPS光谱中未观察到金属银的信号，这表明即使加热到350℃，银阳离子也不会被还原。