Nanosponge TS-1: A Fully Crystalline Hierarchical Epoxidation Catalyst

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10438804" target="_blank" >RIV/00216208:11310/21:10438804 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iU_lJJ-RyG" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iU_lJJ-RyG</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/admi.202001288" target="_blank" >10.1002/admi.202001288</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanosponge TS-1: A Fully Crystalline Hierarchical Epoxidation Catalyst

Popis výsledku v původním jazyce

Epoxide production by organic synthesis raises environmental and safety issues, especially for industrially relevant substrates larger than C(4), which lack effective catalysts for direct epoxidation. However, titanosilicates activate hydrogen peroxide for the epoxidation of C(!)C double bonds. For such purposes, active site accessibility must nevertheless be tuned for each substrate. Accordingly, this paper reports on the preparation, characterization and catalytic properties of an MFI titanosilicate nanosponge (nsTS-1). nsTS-1 is prepared by post-synthesis titanium impregnation of a pure silica MFI nanosponge, producing a fully crystalline and highly open catalyst with a total pore volume of 0.77 cm(3)g(-1). Due to the high external surface of the nanolayered domains, Ti forms isolated framework-attached Ti sites rather than extra-framework TiO2. As a result, the structure of nsTS-1 is more defined and uniform than the structure of other layered titanosilicate catalysts (e.g., silica-titania pillared TS-1). Catalytic tests show: i) that nsTS-1 efficiently catalyzes the epoxidation of cyclic olefins and terpenes and ii) cyclooctene and linalool conversion linearly increases with the external surface area and mesopore volume of the catalyst. Overall, the presented findings enable to tailor effective catalysts for direct epoxidation, thereby potentially reducing costs and waste in the production of large epoxides.

Název v anglickém jazyce

Nanosponge TS-1: A Fully Crystalline Hierarchical Epoxidation Catalyst

Popis výsledku anglicky

Epoxide production by organic synthesis raises environmental and safety issues, especially for industrially relevant substrates larger than C(4), which lack effective catalysts for direct epoxidation. However, titanosilicates activate hydrogen peroxide for the epoxidation of C(!)C double bonds. For such purposes, active site accessibility must nevertheless be tuned for each substrate. Accordingly, this paper reports on the preparation, characterization and catalytic properties of an MFI titanosilicate nanosponge (nsTS-1). nsTS-1 is prepared by post-synthesis titanium impregnation of a pure silica MFI nanosponge, producing a fully crystalline and highly open catalyst with a total pore volume of 0.77 cm(3)g(-1). Due to the high external surface of the nanolayered domains, Ti forms isolated framework-attached Ti sites rather than extra-framework TiO2. As a result, the structure of nsTS-1 is more defined and uniform than the structure of other layered titanosilicate catalysts (e.g., silica-titania pillared TS-1). Catalytic tests show: i) that nsTS-1 efficiently catalyzes the epoxidation of cyclic olefins and terpenes and ii) cyclooctene and linalool conversion linearly increases with the external surface area and mesopore volume of the catalyst. Overall, the presented findings enable to tailor effective catalysts for direct epoxidation, thereby potentially reducing costs and waste in the production of large epoxides.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical 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

2021

Kód důvěrnosti údajů

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

Název periodika

Advanced Materials Interfaces [online]

ISSN

2196-7350

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

2001288

Kód UT WoS článku

000569487100001

EID výsledku v databázi Scopus

2-s2.0-85090964401