Book ChapterDOI
Spectroscopic Characterization of Silicalite and Titanium-Silicalite
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In this article, the surface characterization of silicalite and titanium-silicalite is made by combined use of IR and UV-Vis reflectance spectroscopy, and the nature of the IR modes and of the electronic transitions associated with framework titanium is discussed in detail.Abstract:
Surface characterization of silicalite and titanium-silicalite is made by combined use of IR and UV-Vis reflectance spectroscopy. The nature of the IR modes and of the electronic transitions associated with framework titanium is discussed in detail. The perturbation caused by the adsorption of small polar molecules (H 2 O, NH 3 , CH 3 OH) on both the IR and UV-Vis spectra is discussed in terms of the formation of six-coordinated complexes by ligand insertion in the Ti(IV) coordination sphere. All the Ti(IV) is accessible to the interaction with the molecules.read more
Citations
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Journal ArticleDOI
Photo-catalysis of ethane and carbon dioxide to produce hydrocarbon oxygenates over ZnO-TiO2/SiO2 catalyst
TL;DR: In this article, a supported n-p coupled semiconductor materials ZnO-TiO2/SiO2 were prepared using the method of modifying the silica surface character.
Journal ArticleDOI
Photocatalytic oxidation of gaseous toluene on titania/mesoporous silica powders in a fluidized-bed reactor
Minoo Tasbihi,Urška Lavrenčič Štangar,Urh Černigoj,Jaromir Jirkovsky,Snejana Bakardjieva,Nataša Novak Tušar +5 more
TL;DR: In this paper, the degradation of toluene was carried out on titania/mesoporous silica photocatalysts in a self-constructed gaseous fluidized-bed photoreactor equipped with UVA light source.
Journal ArticleDOI
A spectroscopic study of Group IV transition Metal - Incorporated Direct Templated Mesoporous Catalysts, Part 1: A Comparison Between Materials Synthesized Using Hydrophobic and Hydrophilic Ti Precursors.
Maria E. Raimondi,Enrica Gianotti,Leonardo Marchese,Gianmario Martra,Thomas Maschmeyer,John M. Seddon,Salvatore Coluccia +6 more
TL;DR: Titanium has been incorporated into mesoporous silica using novel one-pot procedures based on the true liquid crystal templating (TLCT) synthesis method as discussed by the authors, and two different Ti sources were used, one ins...
Journal ArticleDOI
Hydroxylation of 1-naphthol by hydrogen peroxide over UL-TS-1 and TS-1 coated MCF
TL;DR: In this article, two different kinds of titano-silicate zeolite/mesoporous molecular sieves (MMS) materials have been produced following techniques proposed recently in our laboratory.
Journal ArticleDOI
Synthesis, characterization and catalytic properties of titanium and boron co-substituted silicalite zeolites
TL;DR: In this article, the main factors affecting Ti and B coincorporated into the framework of silicalite-2 (S-2) such as the used amounts of H2O2 and H3BO3 (used as boron source) and the addition of TMAOH were studied in detail.
References
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Journal ArticleDOI
Silicalite, a new hydrophobic crystalline silica molecular sieve
Edith M. Flanigen,J. M. Bennett,R. W. Grose,J. P. Cohen,R. L. Patton,Richard M. Kirchner,Joseph V. Smith +6 more
TL;DR: In this article, a new polymorph of SiO2 (silicalite, refractive index 1.39, density 1.76 g cm−3) has been proposed, which encloses a three-dimensional system of intersecting channels defined by 10-rings wide enough to adsorb molecules up to 0.6 nm diameter.
Journal ArticleDOI
Zeolites: Catalysts for Organic Syntheses
TL;DR: The characteristic properties of zeolites, such as acidity, shape-selectivity and thermal stability, also enable them to be used for highly selective synthesis in the fields of chemical intermediates and fine chemicals as mentioned in this paper.
Journal ArticleDOI
Identification of ZSM-type and other 5-ring containing zeolites by i.r. spectroscopy
TL;DR: The mid i.r. spectra have been recorded of the pentasil family, of the mordenite group, of ZSM-39 and Melanophlogite as mentioned in this paper.
Book ChapterDOI
Electron Transfer Spectra
TL;DR: In this paper, it was shown that the Laporte-forbidden bands of transition group complexes can be adapted to the strong Laportes-allowed bands, at least in the octahedral complexes of a central ion with six halide ligands.