Chemistry: electrical and wave energy – Processes and products
Patent
1985-06-12
1986-10-07
Weisstuch, Aaron
Chemistry: electrical and wave energy
Processes and products
204400, 204431, G01N 2726, G01N 2746, G01N 2758
Patent
active
046157727
ABSTRACT:
A planar photoelectrochemical sensing structure includes a thin, porous layer of photoactive semiconductor powder material deposited on an electronically conducting catalyst film which has been fabricated in two regions separated by a narrow stripe. Using incident light absorbed by the semiconductor, the structure is suited to photosensitizing redox reactions of chemical species introduced to the structure in an aqueous gas-phase environment. If photocarriers generated by the incident light are prevented from reaching one of the catalyst regions, for example by use of a light shield, then an EMF develops between the two catalyst regions. The magnitude of the EMF varies with the concentration of one of the gaseous reactants and thus provides a measure of the concentration.
REFERENCES:
patent: 4544470 (1985-10-01), Hetrick
"Photoelectrochemistry" by Allen J. Bard, Science, vol. 207, No. 4427, Jan. 1980, pp. 139-144.
"Visible Light Induced Cleavage of Water Into Hydrogen and Oxygen in Colloidal and Microheterogeneous Systems" by John Kiwi et al., Structure and Bonding 49, (1982) pp. 37-39 and pp. 101-125.
"Photoelectrochemistry and Heterogeneous Photocatalysis at Semiconductors" by Allen J. Bard, Journal of Photochemistry, 10, (1979) pp. 59-75.
Abolins Peter
Ford Motor Company
Sanborn Robert D.
Weisstuch Aaron
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