One-step synthesis of a highly active, mesoporous, titanium-containing silica by using bifunctional templating

Z. Shan, E. Gianotti, J. C. Jansen, J. A. Peters, L. Marchese, T. Maschmeyer

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

A highly active, three-dimensional, mesoporous titanosilica, Ti-TUD-1, with comparable properties to Ti-grafted mesoporous silica MCM-41, has been prepared in a one-step synthesis. A non-surfactant chemical, triethanolamine, was used as a template molecule. Triethanolamine easily forms complexes with titanium alkoxides, yielding titanatrane complexes, which together with free triethanolamine form meso-sized aggregates that template mesopores upon increasing the temperature of the synthesis mixture. Triethanolamine served as both mesopore template and ligand for the titanium complexes, which represent the majority of the catalytic-site precursors. The formation of the silica network and the titanium insertion were followed by a combination of diffuse reflectance UV/Vis/NIR and FTIR spectroscopy. A titanium-rich phase was obtained on the mesopore surfaces during calcination, allowing for easy accessibility of the reactants to the catalytic sites. Ti-TUD-1 is about six times more active than framework-substituted Ti-MCM-41 and has similar activity to Ti-grafted MCM-41.

Lingua originaleInglese
pagine (da-a)1437-1443
Numero di pagine7
RivistaChemistry - A European Journal
Volume7
Numero di pubblicazione7
DOI
Stato di pubblicazionePubblicato - 1 apr 2001

Fingerprint

Entra nei temi di ricerca di 'One-step synthesis of a highly active, mesoporous, titanium-containing silica by using bifunctional templating'. Insieme formano una fingerprint unica.

Cita questo