Photoassisted oxidation of oil films on water
The objective of the project is to develop TiO{sub 2}-based photocatalysts for the solar assisted oxidative dissolution of oil slicks. In a TiO{sub 2} crystal, absorption of a photon generates an electron-hole pair. The electron reacts with surface-adsorbed oxygen, reducing it to hydrogen peroxide; the hole directly oxidizes adsorbed organic compounds, usually via an intermediate OH radical. Since the density of TiO{sub 2} (3.8g/cc for anatase, 4.3 g/cc for rutile) is greater than that of either oil or seawater, TiO{sub 2} crystals are attached to inexpensive, engineered hollow glass microspheres to ensure flotation on the oil slick surface. Portions of the microsphere surface not covered by TiO{sub 2} are made oleophilic so that the microbeads will be preferentially attracted to the oil-air interface.
- Research Organization:
- Texas Univ., Austin, TX (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-90ER12101
- OSTI ID:
- 5117156
- Report Number(s):
- DOE/ER/12101-2; ON: DE92002537
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photoassisted oxidation of oil films on water. Final performance report, January 1, 1990--March 31, 1993
Collection optics of TiO{sub 2} photocatalyst on hollow glass microbeads floating on oil slicks
Related Subjects
020900* -- Petroleum-- Environmental Aspects
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
BASIC INTERACTIONS
CHALCOGENIDES
CHEMICAL REACTIONS
COLLISIONS
DISSOLUTION
DOCUMENT TYPES
ECONOMIC ANALYSIS
ECONOMICS
EFFICIENCY
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
GLASS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
INTERACTIONS
MITIGATION
MOLECULE COLLISIONS
NEAR ULTRAVIOLET RADIATION
NONMETALS
OIL SPILLS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PEROXIDES
PHOTOPRODUCTION
PROGRESS REPORT
QUANTUM EFFICIENCY
RADIATIONS
RADICALS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION