Microwave assisted versus convention Cu2+ exchange in mordenite

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Microwave assisted versus convention Cu²⁺ exchange in mordenite. / Zhukov, Y. M.; Shelyapina, M. G.; Zvereva, I. A.; Efimov, A. Y.; Petranovskii, V.

In: Microporous and Mesoporous Materials, Vol. 259, 15.03.2018, p. 220-228.

Research output: Contribution to journal › Article › peer-review

Author

Zhukov, Y. M. ; Shelyapina, M. G. ; Zvereva, I. A. ; Efimov, A. Y. ; Petranovskii, V. / Microwave assisted versus convention Cu²⁺ exchange in mordenite. In: Microporous and Mesoporous Materials. 2018 ; Vol. 259. pp. 220-228.

BibTeX

@article{1ef0dc5d689e445fbef1574e4c41f31b,

title = "Microwave assisted versus convention Cu2+ exchange in mordenite",

abstract = "Sodium mordenite was Cu2+-exchanged by conventional methods at ambient temperature (accepted as 20 degrees C) and with microwave radiation at 100 +/- 1 degrees C. To increase the copper content, we repeat the exchange procedure several times. Both the degree of Cu2+ exchange and the environment of the Cu2+ ions depend on the method of exchange. Neither conventional, nor microwave methods do not destruct the topology of mordenite framework. XRD pattern of the mordenite persists, but slight elastic deformation and some dealumination of the surface layer occurs. For all the studied samples, all the copper ions are in Cu2+ state, neither Cu1+ nor Cu-0 were detected. All the copper ions play the role of charge-balancing counter-cations. Their placement into the interior of zeolite causes the channel contraction due to electrostatic interactions of double charged cations with [AlO4](delta-) units. The increase of copper content is accompanied by increasing of number of water molecules per unit cell. In fully hydrated samples the copper cations are effectively separated from the zeolite framework and are fully surrounded by a water ligand shell.",

keywords = "Copper exchange, Microwave assisted ion exchange, Mordenite, NMR, TGA, XPS, NO, SIZE, STATE, ION-EXCHANGE, COPPER, MOLECULES, REMOVAL, REDUCTION, ZEOLITES",

author = "Zhukov, {Y. M.} and Shelyapina, {M. G.} and Zvereva, {I. A.} and Efimov, {A. Y.} and V. Petranovskii",

year = "2018",

month = mar,

day = "15",

doi = "10.1016/j.micromeso.2017.10.013",

language = "English",

volume = "259",

pages = "220--228",

journal = "Zeolites",

issn = "1387-1811",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Microwave assisted versus convention Cu2+ exchange in mordenite

AU - Zhukov, Y. M.

AU - Shelyapina, M. G.

AU - Zvereva, I. A.

AU - Efimov, A. Y.

AU - Petranovskii, V.

PY - 2018/3/15

Y1 - 2018/3/15

N2 - Sodium mordenite was Cu2+-exchanged by conventional methods at ambient temperature (accepted as 20 degrees C) and with microwave radiation at 100 +/- 1 degrees C. To increase the copper content, we repeat the exchange procedure several times. Both the degree of Cu2+ exchange and the environment of the Cu2+ ions depend on the method of exchange. Neither conventional, nor microwave methods do not destruct the topology of mordenite framework. XRD pattern of the mordenite persists, but slight elastic deformation and some dealumination of the surface layer occurs. For all the studied samples, all the copper ions are in Cu2+ state, neither Cu1+ nor Cu-0 were detected. All the copper ions play the role of charge-balancing counter-cations. Their placement into the interior of zeolite causes the channel contraction due to electrostatic interactions of double charged cations with [AlO4](delta-) units. The increase of copper content is accompanied by increasing of number of water molecules per unit cell. In fully hydrated samples the copper cations are effectively separated from the zeolite framework and are fully surrounded by a water ligand shell.

AB - Sodium mordenite was Cu2+-exchanged by conventional methods at ambient temperature (accepted as 20 degrees C) and with microwave radiation at 100 +/- 1 degrees C. To increase the copper content, we repeat the exchange procedure several times. Both the degree of Cu2+ exchange and the environment of the Cu2+ ions depend on the method of exchange. Neither conventional, nor microwave methods do not destruct the topology of mordenite framework. XRD pattern of the mordenite persists, but slight elastic deformation and some dealumination of the surface layer occurs. For all the studied samples, all the copper ions are in Cu2+ state, neither Cu1+ nor Cu-0 were detected. All the copper ions play the role of charge-balancing counter-cations. Their placement into the interior of zeolite causes the channel contraction due to electrostatic interactions of double charged cations with [AlO4](delta-) units. The increase of copper content is accompanied by increasing of number of water molecules per unit cell. In fully hydrated samples the copper cations are effectively separated from the zeolite framework and are fully surrounded by a water ligand shell.

KW - Copper exchange

KW - Microwave assisted ion exchange

KW - Mordenite

KW - NMR

KW - TGA

KW - XPS

KW - NO

KW - SIZE

KW - STATE

KW - ION-EXCHANGE

KW - COPPER

KW - MOLECULES

KW - REMOVAL

KW - REDUCTION

KW - ZEOLITES

UR - http://www.scopus.com/inward/record.url?scp=85031743614&partnerID=8YFLogxK

U2 - 10.1016/j.micromeso.2017.10.013

DO - 10.1016/j.micromeso.2017.10.013

M3 - Article

AN - SCOPUS:85031743614

VL - 259

SP - 220

EP - 228

JO - Zeolites

JF - Zeolites

SN - 1387-1811

ER -

ID: 9220090