TiO[sub 2] aerogels for photocatalytic decontamination of aquatic environments
- Brooklyn College of CUNY, NY (United States)
We describe synthesis and applications of nonsupported semiconducting porous structures that can be used as photocatalysts for photodegradation or organic pollutants in aqueous environments. The photocatalysts, TiO[sub 2] aerogels, are prepared through the sol-gel method and supercritical point drying. These materials have a porosity of 85%, a BET surface area of 600 m[sup 2]/g, and a bulk density of 0.5 g/cm[sup 3]. X-ray diffraction show the anatase crystalline phase with a crystalline size of 50 [angstrom]. The surface area, pore volume, and pore size distribution of these materials depend on the preparation conditions. The photoassisted oxidation of salicylic acid on these materials was compared to that obtained with commercial (P-25) TiO[sub 2] powder. The aerogel shows a much higher photocatalytic activity. 26 refs., 6 figs., 3 tabs.
- OSTI ID:
- 7046967
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:49; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400500 -- Photochemistry
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
COLLOIDS
CONTROL
DATA
DECOMPOSITION
DIFFRACTION
DISPERSIONS
ENERGY
ENERGY SOURCES
EXPERIMENTAL DATA
GELS
HYDROXY ACIDS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
POLLUTION CONTROL
POROSITY
RENEWABLE ENERGY SOURCES
SALICYLIC ACID
SCATTERING
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
SOLAR ENERGY
SORPTION
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
USES
WATER POLLUTION CONTROL
X-RAY DIFFRACTION