Characterization of titanium dioxide: Factors affecting photocatalytic performance

Book · Thu Jun 01 04:00:00 EDT 1995

OSTI ID:55384

Presley, R W ^[1]

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1. New Mexico Highlands Univ., Las Vegas, NM (United States)

Titanium dioxide is being evaluated as a photocatalyst in the destruction of contaminants in aqueous waste streams. Commercial samples of TiO{sub 2} powder have been obtained for base line studies of the photocatalytic destruction of salicylic acid standards. These commercial samples have been prepared by flame hydrolysis and aerosol or spray pyrolysis. Additional samples of TiO{sub 2} have been prepared in house by precipitation from TiCl{sub 4} in aqueous solution, some with the addition of dopants. X-ray powder diffraction data analysis indicates the predominate phase of these commercial and prepared powders to be anatase. A minor amount of the rutile crystalline phase of TiO{sub 2} was observed at various levels in some of these catalysts. The broadness of the x-ray diffraction bands varied among the samples analyzed and indicated the primary particle size to be within the 500 to 1,000 angstrom range with the product produced in house having the smallest crystallite size. Experiments were then performed to assess the photocatalytic performance of these various types of catalyst in the destruction of 30 ppm salicylic acid in deionized water.

• OSTI ID: 55384
• Report Number(s): CONF-9310328--; ISBN 1-56676-232-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
AMMONIUM HYDROXIDES
CATALYSTS
CRYSTAL STRUCTURE
DOPED MATERIALS
EXPERIMENTAL DATA
HAFNIUM COMPOUNDS
LANTHANUM COMPOUNDS
PARTICLE SIZE
PHOTOCHEMISTRY
SALICYLIC ACID
SYNTHESIS
TITANIUM CHLORIDES
TITANIUM OXIDES
ULTRAVIOLET RADIATION
VANADIUM COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS