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Start Over Descriptor "Sieves -- Usage" Topic x-rays -- analysis
2 results on '"Sieves -- Usage"'

1. Synthesis of TS-I molecular sieve using a new Ti source

Author

Borin, Mario F., da Silva, Teresa, Felisbino, Romilda Fernandez, and Cardoso, Dilson

Subjects
Hydrolysis -- Analysis, Sieves -- Usage, Titanium -- Structure, Titanium -- Chemical properties, Titanium -- Spectra, Ultraviolet spectroscopy -- Analysis, X-rays -- Diffraction, X-rays -- Analysis, Chemicals, plastics and rubber industries
Abstract

The incorporation of Ti in the MFI structure using easy to handle source, the hexafluorotitanic acid, is successfully achieved without the formation of cominant phases. In comparison with the traditionally used tetraethyl orthotitanate and tetraethyl orthosilicate, this method presents the advantages of low cost and stability of the reagents as they do not undergo hydrolysis when exposed to air.

Published
2006

2. Vanadium containing mesoporous silica of high photocatalytic activity and stability even in water

Author

Shiraishi, Yasuhiro, Morishita, Masatsugu, Teshima, Yugo, and Hirai, Takayuki

Subjects
Raman spectroscopy -- Analysis, Sieves -- Usage, X-rays -- Diffraction, X-rays -- Analysis, Chemicals, plastics and rubber industries
Abstract

Vanadium containing mesoporous silica molecular sieve with highly dispersed and tetrahedrally coordinated V-oxide ([V.sup.v][O.sub.4]) species was prepared by a modified surfactant-templating method and its photocatalytic activity and stability was studied. The measurements reveal that the modified templating method creates [V.sup.v][O.sub.4] species confined within silica layer, while other methods create [V.sup.v][O.sub.4] species exposed on silica surface.

Published
2006

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