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Synthesis and photoelectrochemical behaviour of hydrogenated titania nanotubes modified with conducting polymer infiltrated by redox active network
Abstract
In this work, we show preparation of ordered inorganic-organic composite electrode material where hydrogenated titania nanotubes H-TiO2 with tubularly developed surface modified with poly(3,4-ethylenedioxythiophene) matrix permeated by Prussian Blue (PB) inorganic redox network in order to reach highly photoactive heterojunction. The polymer deposition was realized via two subsequent processes covering: i) potentiostatic polymerization carried out at H-TiO2 electrode immersed in solution of EDOT monomer and Fe[(CN)6]3−/4− ions and ii) cyclic voltammetry routs in iron chloride solution. The inorganic-organic hybrids were characterized by scanning electron microscopy, spectroscopic techniques (UV-Vis, Raman, Fourier transform infrared and X-ray photoelectron spectroscopy) and using electrochemical methods. Cyclic voltammetry curves registered for inorganic-organic composite exhibit clear reversible reduction/oxidation peaks attributed to the high spin (HS) FeII/FeIII redox activity when low spin (LS) FeII/FeIII redox activity overlaps with the water oxidation process. The LS FeII/FeIII redox center of PB imbedded in pEDOT matrix plays crucial role in high increase of photocurrent recorded for composite H-TiO2NTs/pEDOT:BP that is 3.7 times higher in comparison to photocurrent measured for H-TiO2NT at anodic polarization of electrode.
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Authors (5)
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Katarzyna Siuzdak
- Polish Academy of Science The Szewalski Institute of Fluid-Flow Machinery, Centre for Plasma and Laser Engineering
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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ELECTROCHIMICA ACTA
no. 222,
pages 1281 - 1292,
ISSN: 0013-4686 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Siuzdak K., Szkoda M., Karczewski J., Ryl J., Lisowska-Oleksiak A.: Synthesis and photoelectrochemical behaviour of hydrogenated titania nanotubes modified with conducting polymer infiltrated by redox active network// ELECTROCHIMICA ACTA. -Vol. 222, (2016), s.1281-1292
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.electacta.2016.11.102
- Verified by:
- Gdańsk University of Technology
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