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Revealing of a Particular Physical Mechanism of Disordered Photocatalytic Structure Functioning

A. Evstratov, C. Chis, J.-M. Taulemesse, P. Gaudon and F. Peirano
Ales Hihg Mining School, FR

Keywords:
amorphous photocatalysts, oxidi-reduction properties, functional mechanism

Abstract:
Both reduction and oxidation products are simultaneously formed at the surface of the crystalline (“classic”) photocatalysts. As to probable photocatalytic properties of disordered structures, their functioning could be provided by a reinforced artificial separation of free charge carriers by means of external electric field. At the surface of disordered composite photocatalysts only one type of free charge carriers is available. This phenomenon avoids a concurrence between holes and electrons reaching the active surface, reinforces particular oxidation or reduction surface capacities and allows an efficient management of the composite photocatalyst reactivity.

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