Fabrication and Electrochemical Properties of Highly Ordered Titania Nanotubes Modified with Boron Nanocrystalline Diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-04-01 |
| Journal | ECS Meeting Abstracts |
| Authors | Robert Bogdanowicz, Katarzyna Siuzdak, MichaÅ Sobaszek, Mariusz Szkoda |
| Institutions | Institute of Fluid Flow-Machinery, GdaÅsk University of Technology |
Abstract
Section titled āAbstractāRecently, we reported on the phenomena of the formation of the novel composite material based on titania nanotubes (TiO 2 NTs) over-grown by thin boron-doped diamond (BDD) produced in microwave plasma enhanced chemical vapor deposition (MW PE CVD) [1,2]. Under microwave plasma treatment, the structure TiO 2 NTs underwent transformation from stoichiometric anatase into non-stochiometric oxide with Ti(III) phase and some rutile phase arises. Furthermore, obtained material was characterized with a significantly enhanced conductivity and capacitance comparing to pristine titania. The electrochemical studies showed that the specific areal capacitance of TiO 2 /BDD raised up to 7.46 mF cm -2 whereas for the pure BDD it reached only 0.11 7.46 mF cm -2 . Because of such strong modification of titania and application potential in energy storage devices we decided to initiate growth of boron nanocrystalline diamond (B-NDC) on the highly ordered TiO 2 nanotube arrays. TiO 2 NTs are fabricated via two-step anodization of titanium metal plate followed by a short immersion in diluted HF in order to remove any surface debris [3]. Titanium plate covered by uniform titania nanotube layer provides a large specific surface area as well as a direct pathway for charge transport, thus holding promising capabilities of being support for another materials deposition. Afterwards, similarly to formation of TiO 2 NTs/BDD material, the deposition of boron nanocrystalline diamond will be also realized under microwave plasma conditions and Ti/TiO 2 NTs will act as a substrate. The morphology and the structure of obtained composite material will be investigated using scanning electron microscopy and Raman spectroscopy. Electrochemical activity will be identified applying cyclic voltammetry and electrochemical impedance spectroscopy techniques performed in aqueous electrolyte. The influence of boron-doping level will be observed as a change in registered capacitive current and impedance behaviour. References: [1] K. Siuzdak, R. Bogdanowicz, M. Sawczak, M. Sobaszek, Enhanced capacitance of composite TiO 2 nanotube/boron-doped diamond electrodes studied by impedance spectroscopy , Nanoscale 7 (2015) 551 [2] M. Sawczak, M. Sobaszek, K. Siuzdak, J. Ryl, R. Bogdanowicz, K. Darowiski, M. Gazda, A. Cenian, Formation of highly conductive boron-doped diamond on TiO 2 nanotubes composite for supercapacitor or energy storage devices , J Electrochem Soc 162 (2015) A2085 [3] M. Szkoda, K. Siuzdak, A. Lisowska-Oleksiak, J. Karczewski, J. Ryl, Facile preparation of extremely photoactive boron-doped TiO 2 nanotube arrays , Electrochem Comm. 60 (2015) 212 Financial support from the Polish National Science Center - under grant No. 2012/07/D/ST5/02269 and No. 2011/03/D/ST7/03541 is gratefully acknowledged.