LONG-LIVED HIGH VOLUMETRIC ACTIVITY PHOTOCATALYSTS

The present disclosure relates to nanocrystalline titanium dioxide (TiO2) photocatalysts having nanocrystallites of less than 14 nanometers in diameter, which are substantially defect-free. The TiO2 photocatalysts form porous particles having a very large mass transfer surface area, large cylindrica...

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Main Authors OBEE, TIMOTHY, N, HAY, STEPHEN, O, VANDERSPURT, THOMAS, HENRY, HUGENER-CAMPBELL, TREESE
Format Patent
LanguageChinese
English
Published 30.04.2010
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:The present disclosure relates to nanocrystalline titanium dioxide (TiO2) photocatalysts having nanocrystallites of less than 14 nanometers in diameter, which are substantially defect-free. The TiO2 photocatalysts form porous particles having a very large mass transfer surface area, large cylindrical pores, and low mass transfer resistance. The nanocrystalline TiO2 photocatalysts provide at least 75% of the photocatalytic activity of commercially-available TiO2 crystals having diameters greater than 20 nm. The nanocrystalline TiO2 photocatalysts may be doped with a metal, metal oxide, or non-metal dopant. A process for preparing the nanocrystalline TiO2 photocatalysts is disclosed. The present disclosure also provides methods for using nanocrystalline TiO2 photocatalysts to remove contaminants.
Bibliography:Application Number: HK20100100075