Engineered photocatalysts for detoxification of waste water
- Sandia National Lab., Albuquerque, NM (United States)
- Duquesne Univ., Pittsburgh, PA (United States). Dept. of Chemistry and Biochemistry; and others
This report describes progress on the development of engineered photocatalysts for the detoxification of water polluted with toxic organic compounds and heavy metals. We examined a range of different oxide supports (titania, alumina, magnesia and manganese dioxide) for tin uroporphyrin and investigated the efficacy of a few different porphyrins. A water-soluble octaacetic-acid-tetraphenylporphyrin and its derivatives have been synthesized and characterized in an attempt to design a porphyrin catalyst with a larger binding pocket. We have also investigated photocatalytic processes on both single crystal and powder forms of semiconducting SiC with an ultimate goal of developing a dual-semiconductor system combining TiO{sub 2} and SiC. Mathematical modeling was also performed to identify parameters that can improve the efficiency of SiC-based photocatalytic systems. Although the conceptual TiO{sub 2}/SiC photodiode shows some promises for photoreduction processes, SiC itself was found to be an inefficient photocatalyst when combined with TiO{sub 2}. Alternative semiconductors with bandgap and band potentials similar to SiC should be tested in the future for further development and a practical utilization of the dual photodiode concept.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 420402
- Report Number(s):
- SAND--96-2925; ON: DE97002378
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CSP
Concentrating Solar Power
DETOXIFICATION
MAGNESIUM OXIDES
MANGANESE
METALS
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PORPHYRINS
SILICON CARBIDES
TIN
TITANIUM OXIDES
WASTE PROCESSING
WASTE WATER