Interface induced growth and transformation of polymer-conjugated proto-crystalline phases in aluminosilicate hybrids: a multiple-quantum 23Na-23Na MAS NMR correlation spectroscopy study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00458292" target="_blank" >RIV/61389013:_____/16:00458292 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/16:00458292

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.langmuir.5b04736" target="_blank" >http://dx.doi.org/10.1021/acs.langmuir.5b04736</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.langmuir.5b04736" target="_blank" >10.1021/acs.langmuir.5b04736</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interface induced growth and transformation of polymer-conjugated proto-crystalline phases in aluminosilicate hybrids: a multiple-quantum 23Na-23Na MAS NMR correlation spectroscopy study

Popis výsledku v původním jazyce

Nanostructured materials typically offer enhanced physicochemical properties because of their large interfacial area. In this contribution, we present a comprehensive structural characterization of aluminosilicate hybrids with polymer-conjugated nanosized zeolites specifically grown at the organic–inorganic interface. The inorganic amorphous Al–O–Si framework is formed by alkali-activated low-temperature transformation of metakaoline, whereas simultaneous copolymerization of organic comonomers creates a secondary epoxide network covalently bound to the aluminosilicate matrix. This secondary epoxide phase not only enhances the mechanical integrity of the resulting hybrids but also introduces additional binding sites accessible for compensating negative charge on the aluminosilicate framework. This way, the polymer network initiates growth and subsequent transformation of protocrystalline short-range ordered zeolite domains that are located at the organic–inorganic interface. By applying an experimental approach based on 2D 23Na–23Na double-quantum (DQ) MAS NMR spectroscopy, we discovered multiple sodium binding sites in these protocrystalline domains, in which immobilized Na+ ions form pairs or small clusters. It is further demonstrated that these sites, the local geometry of which allows for the pairing of sodium ions, are preferentially occupied by Pb2+ ions during the ion exchange. The proposed synthesis protocol thus allows for the preparation of a novel type of geopolymer hybrids with polymer-conjugated zeolite phases suitable for capturing and storage of metal cations. The demonstrated 23Na–23Na DQ MAS NMR combined with DFT calculations represents a suitable approach for understanding the role of Na+ ions in aluminositicate solids and related inorganic–organic hybrids, particularly their specific arrangement and clustering at interfacial areas.

Název v anglickém jazyce

Interface induced growth and transformation of polymer-conjugated proto-crystalline phases in aluminosilicate hybrids: a multiple-quantum 23Na-23Na MAS NMR correlation spectroscopy study

Popis výsledku anglicky

Nanostructured materials typically offer enhanced physicochemical properties because of their large interfacial area. In this contribution, we present a comprehensive structural characterization of aluminosilicate hybrids with polymer-conjugated nanosized zeolites specifically grown at the organic–inorganic interface. The inorganic amorphous Al–O–Si framework is formed by alkali-activated low-temperature transformation of metakaoline, whereas simultaneous copolymerization of organic comonomers creates a secondary epoxide network covalently bound to the aluminosilicate matrix. This secondary epoxide phase not only enhances the mechanical integrity of the resulting hybrids but also introduces additional binding sites accessible for compensating negative charge on the aluminosilicate framework. This way, the polymer network initiates growth and subsequent transformation of protocrystalline short-range ordered zeolite domains that are located at the organic–inorganic interface. By applying an experimental approach based on 2D 23Na–23Na double-quantum (DQ) MAS NMR spectroscopy, we discovered multiple sodium binding sites in these protocrystalline domains, in which immobilized Na+ ions form pairs or small clusters. It is further demonstrated that these sites, the local geometry of which allows for the pairing of sodium ions, are preferentially occupied by Pb2+ ions during the ion exchange. The proposed synthesis protocol thus allows for the preparation of a novel type of geopolymer hybrids with polymer-conjugated zeolite phases suitable for capturing and storage of metal cations. The demonstrated 23Na–23Na DQ MAS NMR combined with DFT calculations represents a suitable approach for understanding the role of Na+ ions in aluminositicate solids and related inorganic–organic hybrids, particularly their specific arrangement and clustering at interfacial areas.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Langmuir

ISSN

0743-7463

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

2787-2797

Kód UT WoS článku

000372856800030

EID výsledku v databázi Scopus

2-s2.0-84962167818