Preparation and characterization of a PbTiO3 + PbO mixed-oxide photoelectrode

Murali Krishna, K. ; Sharon, Maheshwar ; Mishra, M. K. (1995) Preparation and characterization of a PbTiO3 + PbO mixed-oxide photoelectrode Journal of Electroanalytical Chemistry, 391 (1-2). pp. 93-99. ISSN 0022-0728

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A new PbTiO3 + PbO photoelectrode system for a photoelectrochemical cell has been prepared from a mixture of β-PbO2 and TiO2 by solid state sintering. The crystal structure and surface morphology of the mixture were determined by X-ray diffraction and scanning electron microscopy respectively, and energy dispersive X-ray analysis measurements were used to establish the phases present. These studies reveal the photoelectrode as a PbO-rich PbTiO3 mixed-phase oxide with high tetragonality and a crystalline nature. Mott-Schottky plots and photoelectrochemical measurements, such as the action spectrum, I-V characteristics etc., of this mixed oxide were evaluated in 0.1 M Fe(CN)3-/4-6 (pH 9.2 buffer) redox electrolyte. These investigations suggest that the mixed-oxide electrode exhibits n-type conductivity, a decreased band-gap energy and an enhanced absorption range in the visible region.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Mixed-oxides Semiconductor; Solar Cells; Conversion Efficiency
ID Code:20234
Deposited On:20 Nov 2010 14:49
Last Modified:08 Jun 2011 04:41

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