Synthesis of aluminophosphate xerogels by non-hydrolytic sol-gel condensation of EtAlCl2 with trialkylphosphates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00109490" target="_blank" >RIV/00216224:14310/19:00109490 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s10971-019-04953-0" target="_blank" >https://doi.org/10.1007/s10971-019-04953-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10971-019-04953-0" target="_blank" >10.1007/s10971-019-04953-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis of aluminophosphate xerogels by non-hydrolytic sol-gel condensation of EtAlCl2 with trialkylphosphates

Popis výsledku v původním jazyce

We have investigated the preparation of high-surface-area mesoporous aluminophosphates by non-hydrolytic sol-gel method based on reactions of EtAlCl2 with trialkylesters of phosphoric acid (OP(OR)(3), R=Me, Et, Pr-i, Bu-n, in dry organic solvents. The condensations proceed by alkylchloride elimination. Various reaction and calcination conditions were examined. Porosity is obtained after calcination by removal of organic residual groups. This thermal processing at 300 degrees C of as-synthesized precursor gels leads to amorphous aluminophosphate xerogels with surface areas of 400-500m(2)g(-1) provided by small mesopores (2-8nm). Changes in the coordination environment of aluminium from six- to four-coordinate are evidenced by shift of Al-27 MAS NMR resonances. Highlights Dichloroethylalane reacts with trialkylphosphates by alkylchloride elimination.Aluminophosphate gels are obtained from the non-hydrolytic sol-gel technique.Thermal processing at 300 degrees C leads to amorphous xerogels with surface areas of 400-500m(2)g(-1).Porosity is composed of small mesopores (2-8nm).Templating with Pluronic P123 significantly improves pore size distribution.

Název v anglickém jazyce

Synthesis of aluminophosphate xerogels by non-hydrolytic sol-gel condensation of EtAlCl2 with trialkylphosphates

Popis výsledku anglicky

We have investigated the preparation of high-surface-area mesoporous aluminophosphates by non-hydrolytic sol-gel method based on reactions of EtAlCl2 with trialkylesters of phosphoric acid (OP(OR)(3), R=Me, Et, Pr-i, Bu-n, in dry organic solvents. The condensations proceed by alkylchloride elimination. Various reaction and calcination conditions were examined. Porosity is obtained after calcination by removal of organic residual groups. This thermal processing at 300 degrees C of as-synthesized precursor gels leads to amorphous aluminophosphate xerogels with surface areas of 400-500m(2)g(-1) provided by small mesopores (2-8nm). Changes in the coordination environment of aluminium from six- to four-coordinate are evidenced by shift of Al-27 MAS NMR resonances. Highlights Dichloroethylalane reacts with trialkylphosphates by alkylchloride elimination.Aluminophosphate gels are obtained from the non-hydrolytic sol-gel technique.Thermal processing at 300 degrees C leads to amorphous xerogels with surface areas of 400-500m(2)g(-1).Porosity is composed of small mesopores (2-8nm).Templating with Pluronic P123 significantly improves pore size distribution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Sol-Gel Science and Technology

ISSN

0928-0707

e-ISSN

1573-4846

Svazek periodika

91

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

385-398

Kód UT WoS článku

000473156200015

EID výsledku v databázi Scopus

2-s2.0-85063024806