H2O2-Based Selective Oxidations over Titaniumsilicates of SBA-15 Type
Science article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Microporous and Mesoporous Materials
ISSN: 1387-1811
, E-ISSN: 1873-3093
|
| Output data |
Year: 2003,
Volume: 59,
Number: 2-3,
Pages: 73-84
Pages count
: 12
DOI:
10.1016/S1387-1811(03)00287-7
|
| Tags |
H2O2, Mesoporous titaniumsilicate, Selective oxidation, Ti-SBA-15 |
| Authors |
Trukhan N.N.
1
,
Romannikov V.N.
1
,
Shmakov A.N.
1
,
Vanina M.P.
1
,
Paukshtis E.A.
1
,
Bukhtiyarov V.I.
1
,
Kriventsov V.V.
1
,
Danilov I.Yu.
2
,
Kholdeeva O.A.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, Pr. Academika Lavrentiev Av. 5, Novosibirsk 630090, Russia
|
| 2 |
Institute of Chemistry and Chemical Engineering, K. Marx Av. 42, Krasnoyarsk 660049, Russia
|
|
Funding (4)
|
1
|
Civilian Research and Development Foundation
|
REC-008
|
|
2
|
Russian Foundation for Basic Research
|
01-03-32391
|
|
3
|
Russian Foundation for Basic Research
|
01-03-32852
|
|
4
|
Russian Foundation for Basic Research
|
02-03-06352
|
Hexagonally packed mesostructured titanosilicates of the SBA-15 type have been prepared in moderately acidic aqueous media starting from sodium disilicate Na2Si2O5, TiOSO4, and olefin oxide co-polymer of the Pluronic type (P123) as a template. Structure–texture parameters of the synthesised materials were characterised by using X-ray diffraction and nitrogen adsorption techniques. The titanium state in the silicate matrix was characterised by DR-UV, IR, Raman spectroscopy, and XPS. The catalytic properties of the new titaniumsilicates were tested in oxidation reactions with aqueous H2O2 using methyl phenyl sulfide and 2,3,6-trimethylphenol as model substrates and compared with the catalytic properties of TS-1 and Ti-MMM (titaniumsilicate of the MCM-41 type). The structure of the Ti-SBA-15 materials, by contrast to Ti-MMM catalysts, was proved to be hydrolytically stable towards aqueous H2O2. The catalytic activity of Ti-SBA-15 is considerably lower than that of Ti-MMM, most likely due to a lower titanium dispersion and higher wall thickness of the former material, which makes part of titanium sites unavailable for the reactants.