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Title: Interaction between the exchanged Mn2+ and Yb3+ ions confined in zeolite-Y and their luminescence behaviours

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab.; UChicago Argonne, LLC
Sponsoring Org.:
DOE - BASIC ENERGY SCIENCESNSFDOE-NNSAFOREIGN; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1425873
Alternate Identifier(s):
OSTI ID: 1357630
Grant/Contract Number:
NA0001974; FG02-99ER45775; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ye, Shi, Sun, Jiayi, Yi, Xiong, Wang, Yonggang, and Zhang, Qinyuan. Interaction between the exchanged Mn2+ and Yb3+ ions confined in zeolite-Y and their luminescence behaviours. United States: N. p., 2017. Web. doi:10.1038/srep46219.
Ye, Shi, Sun, Jiayi, Yi, Xiong, Wang, Yonggang, & Zhang, Qinyuan. Interaction between the exchanged Mn2+ and Yb3+ ions confined in zeolite-Y and their luminescence behaviours. United States. doi:10.1038/srep46219.
Ye, Shi, Sun, Jiayi, Yi, Xiong, Wang, Yonggang, and Zhang, Qinyuan. Mon . "Interaction between the exchanged Mn2+ and Yb3+ ions confined in zeolite-Y and their luminescence behaviours". United States. doi:10.1038/srep46219. https://www.osti.gov/servlets/purl/1425873.
@article{osti_1425873,
title = {Interaction between the exchanged Mn2+ and Yb3+ ions confined in zeolite-Y and their luminescence behaviours},
author = {Ye, Shi and Sun, Jiayi and Yi, Xiong and Wang, Yonggang and Zhang, Qinyuan},
abstractNote = {},
doi = {10.1038/srep46219},
journal = {Scientific Reports},
number = 4,
volume = 7,
place = {United States},
year = {Mon Apr 10 00:00:00 EDT 2017},
month = {Mon Apr 10 00:00:00 EDT 2017}
}

Journal Article:
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  • The interaction of chlorinated ethylenes (vinyl chloride, 1,1 dichloroethylene, trichloroethylene, and perchloroethylene) with the surface of chromium exchanged zeolite Y (Cr-Y) catalyst has been studied by in situ FT-IR spectroscopy. The adsorptions were carried out on the in situ oxidized Cr-Y pellet at temperatures between 25 and 300{degrees}C in a dry nitrogen stream as a means of studying possible decomposition intermediates. The adsorption at 25{degrees}C was chiefly physical in nature although some dechlorination of the molecule was evident even at this temperature. At higher temperatures, between 100 and 300{degrees}C, an oxygen attack on the adsorbed molecule led to the formationmore » of partially and/or fully oxygenated (but still adsorbed) species. These oxygenated species, including carboxylate and carbonate, were found to contain fewer chlorine atoms than the original feed molecule. The catalytic activity for the formation of these intermediates was found to diminish with increasing chlorine content of the feed molecule. Based on these results, a reaction pathway for the progressive catalytic oxidation of chlorinated ethylenes has been proposed. 32 refs., 12 figs., 3 tabs.« less
  • Zn2SiO4:Mn2+, Zn2SiO4:Mn3+, and Zn2SiO4:Mn2+, Eu3+ phosphors were prepared by a sol-gel process and their luminescence spectra were investigated. The emission bands from intra-ion transitions of Mn2+ and Eu3+ samples were studied as a function of pressure. The pressure coefficient of Mn2+ emission was found to be -25.3?0.5 and -28.5?0.9 neV/GPa for Zn2SiO4:Mn2+ and Zn2SiO4:Mn2+, Eu3+, emission shows only weak pressure dependence. The pressure dependences of the Mn2+ and Eu3+ emissions in Zn2SiO4:Mn2+, Eu3+ are slightly different from that in Zn2SiO4:Mn2+ and Zn2SiO4:Mn3+ samples, which can be attributed to the co-doping of Mn2+ and Eu3+ ions. The Mn2+ emission in themore » two samples, however, exhibits analogous temperature dependence and similar luminescence lifetimes, indicating no energy transfer from Mn2+ to Eu3+ occurs.« less
  • Electron spin resonance (ESR) and electron spin-echo modulation (ESEM) spectroscopies have been used to characterize the aqueous coordination and location of catalytically active Cu(II) cation-exchanged into K-Y zeolite. The higher Si/Al ratio in CuK-Y compared to CuK-X gives rather different ESR parameters for Cu(II). Under complete hydration, ESR indicates freely rotating Cu(II) ions in the {alpha} cage, and the corresponding ESEM indicates six directly bound water molecules. Under partial dehydration, ESR shows that Cu(II) becomes immobilized near the six-ring window of the zeolite, and the corresponding ESEM indicates coordination to three water molecules. Upon dehydration and at high temperature, ESRmore » shows that the cupric ions mainly move into the {beta} cage and hexagonal prism. The Cu(II)-catalyzed oxidation of propylene over dehydrated CuK-Y zeolite with low Cu(II) exchange was studied over the temperature range of 160 to 400{degree}C under conditions of excess oxygen in a flow system in order to investigate the temperature dependence of the catalytic activity, the migration of Cu(II) species, the Cu(II) coordination complexes formed in the zeolite framework, and the comparison with previous results on CuK-X zeolite. The catalytic activity of CuK-Y was comparable to that of CuK-X under the same conditions.« less
  • Iron-exchanged zeolites with Si/Al ratios ranging from 2.49 to 8.88 were characterized by Moessbauer spectroscopy and studied for the decomposition of N/sub 2/O. Moessbauer spectra were collected at room temperature after pretreatments in H/sub 2/ and O/sub 2/ at 700 K, and after exposure of the samples to CO or H/sub 2/O. Nitrous oxide decomposition activities were determined at 800 K under a N/sub 2/O partial pressure of 3.5 kPa. Moessbauer spectra collected after pretreatment in H/sub 2/ showed that silicon-substituted Fe-Y had a larger fraction of iron cations in sites I', II', and/or II than conventional Fe-Y, in whichmore » most iron cations were in site I. The silicon-substituted Fe-Y catalysts had higher turnover frequencies for the decomposition of N/sub 2/O than conventional Fe-Y. Moessbauer spectra collected after pretreatment in O/sub 2/ showed that a fraction of the iron cations in silicon-substituted Fe-Y was more difficult to oxidize to Fe/sup 3 +/ than the iron in conventional Fe-Y. Moessbauer spectra collected after pretreatment in O/sub 2/ showed that a fraction of the iron cations in silicon-substituted Fe-Y was more difficult to oxidize to Fe/sup 3 +/ than the iron in conventional Fe-Y. This result suggests that pairs of iron cations in close proximity are needed for the oxidation process to occur readily. Finally, exposure of the zeolites to CO or H/sub 2/O produced Moessbauer spectroscopy doublets due to iron cations associated with adsorbate molecules. These doublets indicate that ferrous cations at sites I', II', and/or II serve as adsorption centers for H/sub 2/O, the adsorption process increasing the coordination of the ferrous cations, and that ferrous cations at site II can serve as adsorption centers for CO as well. 22 references.« less