Chemistry: electrical and wave energy – Processes and products
Patent
1976-09-30
1978-06-13
Weisstuch, Aaron
Chemistry: electrical and wave energy
Processes and products
60641, 204 84, 204128, 204129, 2041571R, 204248, 250527, 357 85, 429111, C25B 100, C25B 104
Patent
active
040947513
ABSTRACT:
Photochemical diodes are provided which use light to drive both endoergic and exoergic chemical reactions such that optical energy is converted into chemical energy. The photochemical diodes are typically suspended in a bulk volume matrix of the constituent chemical reactants. The photochemical diodes, in the form of either Schottky-type diodes or p-n type diodes, are employed, for example, to convert water into hydrogen plus oxygen (or hydrogen peroxide); to convert hydrogen sulfide into hydrogen plus sulfur; and to photo-catalyze chemical reactions. The photochemical diodes of the invention comprise two portions, a first portion comprising an appropriately doped semiconductor material of a given conductivity and provided with an ohmic contact and a second portion comprising either metal (Schottky-type) or an appropriately doped semiconductor material of a conductivity type opposite to that of the first portion and provided with an ohmic contact (p-n type). The two portions are intimately joined together through the ohmic contact(s). Solar radiation is conveniently employed as a source of optical energy.
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Allied Chemical Corporation
Collins David W.
Fuchs Gerhard H,.
Weisstuch Aaron
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