Title: Effects of altervalent cation doping on electrical conductivity of platinized titania
Abstract: Electrical conductivity measurements of pure and doped platinized titania were conducted to obtain a qualitative estimate of alterations of the Fermi energy level of electrons of the carrier upon doping. It is established that, under any environment, the specific electrical conductivity of TiO2 doped with cations of higher valence (Sb5+, Ta5+, W6+) is significantly higher than that of undoped or equal valence (Ge4+ )-doped TiO2 which, in turn, is higher than that of lower valence (Mg2+ )-doped TiO2. The activation energy of electron conduction follows the opposite trend. Differences in electrical conductivity are a function of temperature and of the environment in which the sample exists. Electrical conductivity was found to decrease in the order: H2 > CO > vacuum.
Publication Year: 1989
Publication Date: 1989-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 43
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