Titre du document / Document title

Synthesis of self-organized mixed oxide nanotubes by sonoelectrochemical anodization of Ti-8Mn alloy

Auteur(s) / Author(s)

MOHAPATRA Susanta K. ⁽¹⁾ ; RAJA Krishnan S. ⁽¹⁾ ; MISRA Mano ⁽¹⁾ ; MAHAJAN Vishal K. ⁽¹⁾ ; AHMADIAN Mo ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Materials Science and Metallurgical Engineering, MS 388, University of Nevada, Reno, NV 89557, ETATS-UNIS

Résumé / Abstract

Self ordered arrays of titanium manganese mixed oxide nanotubes were prepared by anodization of Ti8Mn alloy (UNS R56080) under ultra-sonication in diluted ethylene glycol containing fluoride. The dimensions of the nanotubes (diameter: 20-100 nm and length: 0.5-2.0 μm) could be tuned by changing the synthesis parameters. The as-anodized nanotubes showed a stoichiometry of (Ti,Mn)O₂. Upon annealing at 500 °C in oxygen atmosphere, the nanotubes contained a mixture of anatase + rutile phases of TiO₂ and Mn₂O₃ The composition of the oxide nanotubes was influenced by the chemistry of the phases present in the alloy. More manganese content was observed in the oxide formed on the (3-phase than in the oxide layer of α-phase. Anodization in the ultrasonic field increased the kinetics of nanotubular oxide formation and resulted in homogeneous ordering of the nanotubular arrays as compared to the anodization by conventional stirring in the fluoride containing ethylene glycol solution. Whereas, anodization in aqueous acidified fluoride solutions resulted in severe attack of the β-phase and did not show presence of nanotubular oxide structure.

Revue / Journal Title

Electrochimica acta   ISSN 0013-4686   CODEN ELCAAV 

Source / Source

2007, vol. 53, n^o2, pp. 590-597 [8 page(s) (article)] (30 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Oxford, ROYAUME-UNI  (1959) (Revue)

Mots-clés anglais / English Keywords

X radiation ; Surface structure ; Morphology ; Operating conditions ; Photoelectron spectroscopy ; Manganese alloys ; Titanium alloys ; Titanium IV Oxides ; Ultrasonic waves ; Glycol ; Ethylene glycol ; Transmission electron microscopy ; Anodizing ; Nanotubes ; Manganese Oxides ; Self organization ; Chemical synthesis ;

Mots-clés français / French Keywords

Rayon X ; Structure surface ; Morphologie ; Condition opératoire ; Spectrométrie photoélectron ; Manganèse alliage ; Titane alliage ; Titane IV Oxyde ; Ultrason ; Glycol ; Ethane-«1,2»-diol ; Microscopie électronique transmission ; Anodisation ; Nanotube ; Manganèse Oxyde ; Autoorganisation ; Synthèse chimique ;

Mots-clés espagnols / Spanish Keywords

Condición operatoria ; Titanio IV Óxido ; Glicol ; Autoorganización ; Síntesis química ;

Mots-clés d'auteur / Author Keywords

TiMn mixed oxide nanotubes ; Ethylene glycol ; Ultrasonic ; TiO2 ; Mn2O3 ;

Localisation / Location

INIST-CNRS, Cote INIST : 1516, 35400017420614.0400