Synthesis of high surface area aluminophosphate and
-phosphonate xerogels by non-hydrolytic sol-gel reactions

J 2021

Synthesis of high surface area aluminophosphate and -phosphonate xerogels by non-hydrolytic sol-gel reactions

MACHÁČ, Petr, Johan G ALAUZUN, Aleš STÝSKALÍK, Damien P DEBECKER, Hubert P MUTIN et. al.

Basic information

Original name

Synthesis of high surface area aluminophosphate and -phosphonate xerogels by non-hydrolytic sol-gel reactions

Name in Czech

Syntéza alumofosfátových a fosfonátových xerogelů s vysokým měrným povrchem pomocí nehydrolytických sol-gelových metod.

Authors

MACHÁČ, Petr (203 Czech Republic, belonging to the institution), Johan G ALAUZUN (250 France), Aleš STÝSKALÍK (203 Czech Republic, belonging to the institution), Damien P DEBECKER (56 Belgium), Hubert P MUTIN (250 France) and Jiří PINKAS (203 Czech Republic, guarantor, belonging to the institution)

Edition

Microporous and Mesoporous Materials, Amsterdam, Elsevier, 2021, 1387-1811

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10402 Inorganic and nuclear chemistry

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 5.876

RIV identification code

RIV/00216224:14310/21:00120772

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1016/j.micromeso.2020.110682

UT WoS

000600420800008

Keywords (in Czech)

Alumofosfáty; Alumofosfonáty; Nehydrolytický; Sol-Gel; silylaminová eliminace; Mezoporézní; Hybridní; Xerogel; Měrný Povrch; Katalýza

Keywords in English

Aluminophosphates; Aluminophosphonates; Non-hydrolytic; Sol-gel; Silylamine elimination; Mesoporous; Hybrid; Xerogel; Surface area; Catalysis

Abstract

V originále

We disclose the preparation of high-surface-area mesoporous aluminophosphates and aluminophosphonates by the non-hydrolytic sol-gel reactions (NHSG) of Al(NMe2)3 with trimethylsilylated phosphate, phosphonates, and bis-phosphonates) in dry toluene. The reactions proceed by silylamine elimination of Me3SiNMe2 to provide organic-inorganic hybrid xerogels with properties influenced by organic substituents and the Al:P ratio of the precursors.Dried xerogels exhibit large surface areas (up to 1000 m2 g-1) and matrices based on condensed Al-O-P networks. They stay stable under relatively harsh thermal conditions. 27Al, 13C, and 29Si solid-state NMR spectroscopy was employed to characterize the aluminum coordination and the residual amido and trimethylsilyl groups. The catalytic performance of NHSG prepared material was examined in gas-phase dehydration of ethanol to ethylene exhibiting conversion and selectivity comparable to weak solid acid benchmark catalysts. The number of unreacted surface groups was determined by gravimetric measurements and by thermal analysis (TG-DSC). These residual groups have the potential to be used in post-synthetic grafting of catalytically active metal centers.

Links

LM2018127, research and development project

Name: Česká infrastruktura pro integrativní strukturní biologii (Acronym: CIISB)

Investor: Ministry of Education, Youth and Sports of the CR

LQ1601, research and development project

Name: CEITEC 2020 (Acronym: CEITEC2020)

Investor: Ministry of Education, Youth and Sports of the CR

7AMB17FR050, research and development project

Name: Nehydrolytická sol-gelová syntéza oxidů a fosforečnanů kovů a jejich aplikace v katalýze a ukládání energie

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

MACHÁČ, Petr, Johan G ALAUZUN, Aleš STÝSKALÍK, Damien P DEBECKER, Hubert P MUTIN and Jiří PINKAS. Synthesis of high surface area aluminophosphate and -phosphonate xerogels by non-hydrolytic sol-gel reactions. Microporous and Mesoporous Materials. Amsterdam: Elsevier, 2021, vol. 311, February 2021, p. 1-9. ISSN 1387-1811. Available from: https://dx.doi.org/10.1016/j.micromeso.2020.110682.

@article{1686656,
   author = {Macháč, Petr and Alauzun, Johan G and Stýskalík, Aleš and Debecker, Damien P and Mutin, Hubert P and Pinkas, Jiří},
   article_location = {Amsterdam},
   article_number = {February 2021},
   doi = {http://dx.doi.org/10.1016/j.micromeso.2020.110682},
   keywords = {Aluminophosphates; Aluminophosphonates; Non-hydrolytic; Sol-gel; Silylamine elimination; Mesoporous; Hybrid; Xerogel; Surface area; Catalysis},
   language = {eng},
   issn = {1387-1811},
   journal = {Microporous and Mesoporous Materials},
   title = {Synthesis of high surface area aluminophosphate and -phosphonate xerogels by non-hydrolytic sol-gel reactions},
   url = {http://dx.doi.org/10.1016/j.micromeso.2020.110682},
   volume = {311},
   year = {2021}
}

TY  - JOUR
ID  - 1686656
AU  - Macháč, Petr - Alauzun, Johan G - Stýskalík, Aleš - Debecker, Damien P - Mutin, Hubert P - Pinkas, Jiří
PY  - 2021
TI  - Synthesis of high surface area aluminophosphate and -phosphonate xerogels by non-hydrolytic sol-gel reactions
JF  - Microporous and Mesoporous Materials
VL  - 311
IS  - February 2021
SP  - 1-9
EP  - 1-9
PB  - Elsevier
SN  - 13871811
KW  - Aluminophosphates
KW  - Aluminophosphonates
KW  - Non-hydrolytic
KW  - Sol-gel
KW  - Silylamine elimination
KW  - Mesoporous
KW  - Hybrid
KW  - Xerogel
KW  - Surface area
KW  - Catalysis
UR  - http://dx.doi.org/10.1016/j.micromeso.2020.110682
L2  - http://dx.doi.org/10.1016/j.micromeso.2020.110682
N2  - We disclose the preparation of high-surface-area mesoporous aluminophosphates and aluminophosphonates by the non-hydrolytic sol-gel reactions (NHSG) of Al(NMe2)3 with trimethylsilylated phosphate, phosphonates, and bis-phosphonates) in dry toluene. The reactions proceed by silylamine elimination of Me3SiNMe2 to provide organic-inorganic hybrid xerogels with properties influenced by organic substituents and the Al:P ratio of the precursors.Dried xerogels exhibit large surface areas (up to 1000 m2 g-1) and matrices based on condensed Al-O-P networks. They stay stable under relatively harsh thermal conditions. 27Al, 13C, and 29Si solid-state NMR spectroscopy was employed to characterize the aluminum coordination and the residual amido and trimethylsilyl groups. The catalytic performance of NHSG prepared material was examined in gas-phase dehydration of ethanol to ethylene exhibiting conversion and selectivity comparable to weak solid acid benchmark catalysts. The number of unreacted surface groups was determined by gravimetric measurements and by thermal analysis (TG-DSC). These residual groups have the potential to be used in post-synthetic grafting of catalytically active metal centers.
ER  -

MACHÁČ, Petr, Johan G ALAUZUN, Aleš STÝSKALÍK, Damien P DEBECKER, Hubert P MUTIN and Jiří PINKAS. Synthesis of high surface area aluminophosphate and -phosphonate xerogels by non-hydrolytic sol-gel reactions. \textit{Microporous and Mesoporous Materials}. Amsterdam: Elsevier, 2021, vol.~311, February 2021, p.~1-9. ISSN~1387-1811. Available from: https://dx.doi.org/10.1016/j.micromeso.2020.110682.

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