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The Effect of Deposition on Electrochemical Impedance Properties of TiO2/FTO Photoanodes.
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SYSNO ASEP 0460509 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Effect of Deposition on Electrochemical Impedance Properties of TiO2/FTO Photoanodes. Author(s) Balkan, T. (TR)
Guler, Z. (TR)
Morozová, Magdalena (UCHP-M) RID, SAI
Dytrych, Pavel (UCHP-M) RID, ORCID, SAI
Šolcová, Olga (UCHP-M) RID, ORCID, SAI
Sarac, A.S. (TR)Source Title Journal of Electroceramics - ISSN 1385-3449
Roč. 36, 1-4 (2016), s. 102-111Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords nanofiber ; titanium dioxide (TiO2) ; electrochemical impedance spectroscopy Subject RIV CI - Industrial Chemistry, Chemical Engineering Institutional support UCHP-M - RVO:67985858 UT WOS 000379164700015 EID SCOPUS 84960077746 DOI 10.1007/s10832-016-0021-6 Annotation The integration of TiO2 layers onto a substrate is challenging and limits the application potential of TiO2. Even though, several studies have been reported to solve this problem by applying various deposition methods, there is still lack of information about how these methods affect the electrochemical and photo-electrochemical properties of resulting electrodes. The TiO2 layers possessing different morphologies, deposited on the conductive FTO glass by means of various different deposition techniques (dip-coating, electrospinning and electrospraying), were used as photoanode (and working electrode) in the three-compartment electrochemical cell. The TiO2 electrodes were calcinated at 450 °C and after that all samples revealed the crystallographic form of anatase. Using these three deposition techniques, three different morphologies were obtained. They consisted of a thin TiO2 nanoparticle layer, TiO2 nanoparticle/nanofiber layer and TiO2 nanorod layer, respectively. The crystallinity and surface properties of the calcinated layers were determined by XRD, Raman spectroscopy, FTIR-ATR and SEM analyses. The electrochemical impedance (EIS) and photo-induced properties of photoanodes were studied by electrochemical measurements. The effects of surface morphology and crystal size of nanostructured layers on electrochemical impedance and photo-electrochemical properties were investigated. The electrodes prepared by dip-coating technique showed the best electrochemical impedance and photo-electrochemical results compared to other two types of electrodes. Dip-coating TiO2 layer possesses the biggest crystal size and lowest charge transfer resistance which result the highest photocurrent density. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2017
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