Key Oxidation Parameters that Influence Photo-Induced Properties and Applications of Anodic Titanium Oxides

Piazza V, Mazare AV, Diamanti MV, Pedeferri M, Schmuki P (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Journal of The Electrochemical Society Electrochemical Society

Book Volume: 163

Pages Range: H119-H127

Journal Issue: 2

DOI: 10.1149/2.0891602jes

Abstract

In the present work we investigate compact anodic oxides formed on titanium by a broad range of anodizing parameters (electrolyte, applied voltage, substrate pre-treatment) and their influence on the performance of such oxides in photocurrent response and photocatalytic properties (photodegradation of AO7). In general, crystallinity and ion inclusion from the electrolyte are crucial. As-grown compact layers of partial crystallinity show increased efficiencies in both applications; interestingly, phosphate ions have a detrimental effect, whereas sulfate ions do not. After thermal annealing (crystallization) the photoresponse significantly increases: except for a crystallization of the anodic layer, annealing causes a rutile oxide layer growth at the oxide/metal interface - this is found to additionally affect the photoresponse. Results overall demonstrate that higher anodization voltage, exclusion of phosphates from the electrolyte, substrate pre-treatment and annealing are of major importance for achieving an enhanced photoresponse on compact anodic layers.

Authors with CRIS profile

Anca Valentina Mazare Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Politecnico di Milano IT Italy (IT)

How to cite

APA:

Piazza, V., Mazare, A.V., Diamanti, M.V., Pedeferri, M., & Schmuki, P. (2016). Key Oxidation Parameters that Influence Photo-Induced Properties and Applications of Anodic Titanium Oxides. Journal of The Electrochemical Society, 163(2), H119-H127. https://dx.doi.org/10.1149/2.0891602jes

MLA:

Piazza, Valerio, et al. "Key Oxidation Parameters that Influence Photo-Induced Properties and Applications of Anodic Titanium Oxides." Journal of The Electrochemical Society 163.2 (2016): H119-H127.

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