Identification of the silver state in the framework of Ag-containing zeolite by XRD, FTIR, photoluminescence, 109Ag NMR, EPR, DR UV-vis, TEM and XPS investigations. Issue 42 (14th October 2016)

• Record Type: Journal Article
• Authors: Popovych, Nataliia; Kyriienko, Pavlo; Soloviev, Sergiy; Baran, Rafal; Millot, Yannick; Dzwigaj, Stanislaw
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 42(2016)
• Page Start: 29458
• Page End: 29465
• Publication Date: 2016-10-14
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp05263k
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : 109 Ag NMR allowed identifying changes in the silver state as a function of Ag content and thermal and hydrogen treatment. Abstract : Silver has been identified in the framework of Ag x SiBEA zeolites (where x = 3–6 Ag wt%) by the combined use of XRD, 109 Ag MAS NMR, FTIR, diffuse reflectance UV-visible, EPR and XPS spectroscopy. The incorporation of Ag ions into the framework of SiBEA zeolite has been evidenced by XRD. The consumption of OH groups as a result of their reaction with the silver precursor has been monitored by FTIR and photoluminescence spectroscopy. The changes in the silver state as a function of Ag content and thermal and hydrogen treatment at 573 K have been identified by 109 Ag MAS NMR, EPR, DR UV-visible, TEM and XPS investigations. The acidity of AgSiBEA has been investigated by FTIR spectroscopy of adsorbed CO and pyridine used as probe molecules.