Incorporation of Silver Atoms into the Vacant T-Atom Sites of the Framework of SiBEA Zeolite as Mononuclear Ag(I) Evidenced by XRD, FTIR, NMR, DR UV鈥搗is, XPS, and TPR

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• 作者：Stanislaw Dzwigaj ; Yannick Millot ; Jean-Marc Krafft ; Nataliia Popovych ; Pavlo Kyriienko
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：June 20, 2013
• 年：2013
• 卷：117
• 期：24
• 页码：12552-12559
• 全文大小：427K
• 年卷期：v.117,no.24(June 20, 2013)
• ISSN：1932-7455

文摘

An AgSiBEA zeolite has been prepared by a two-step postsynthesis procedure that consists of first creating the vacant T atom sites with associated silanol groups by treatment of TEABEA zeolite with nitric acid and then impregnating of resulting SiBEA zeolite with an aqueous solution of AgNO₃. The incorporation of Ag ions into the vacant T atom sites of the framework of SiBEA zeolite as mononuclear Ag(I) has been evidenced by combined use of XRD, NMR, FTIR, diffuse reflectance UV鈥搗is, XPS, and TPR. The consumption of OH groups has been monitored by FTIR. The Br酶nsted and Lewis acidities of AlBEA, SiBEA, and AgSiBEA have been identified by FTIR spectroscopy of adsorbed pyridine and CO as probe molecules.