NDLI: Niobia films: surface morphology, surface analysis, photoelectrochemical properties and crystallization process

Content Provider	Springer Nature Link
Author	de Filho, D. A. B Franco, D. W Filho, P. P. A Alves, O. L
Copyright Year	1998
Abstract	The photoelectrochemical properties of sol–gel Nb2O5 coatings have been discussed in terms of their surface morphology. Niobium chloroalkoxide solution was prepared and thin films were deposited by dip-coating on the indium–tin oxide conductor glass. Structural, optical and electro-properties of amorphous and crystalline sol–gel coatings have been determined. Powders were prepared by the hydrolysis of amorphous niobium and were characterized by X-ray diffraction and electron paramagnetic resonance. These measurements indicated which changes were introduced in the photoelectrical behaviour of the semiconductor due to its crystalline structure. The absorption measurements showed an absorption band in the ultraviolet range associated with the electronic transfer O2-→Nb5+ whose energy gap was around 3.3 eV. The photoelectrochemical measurements for the coatings were done in lithium perclorate and were used to determine the flat band potential, Vbp, and the electron diffusion length, L. The influence of particle sizes in the charge-transfer process at the semiconductor–electrolyte interface was discussed according to the models of Gartner and Sodergren. © 1998 Chapman & Hall
Starting Page	2607
Ending Page	2616
Page Count	10
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	33
Issue Number	10
e-ISSN	15734803
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation Materials Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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