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TiO2 microrods with stacked 3D nanovoids for photoelectrochemical water splitting
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SYSNO ASEP 0508513 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title TiO2 microrods with stacked 3D nanovoids for photoelectrochemical water splitting Author(s) Mamoň, Filip (UACH-T) SAI, RID
Fajgar, Radek (UCHP-M) RID, ORCID, SAI
Jandová, Věra (UCHP-M) RID, ORCID, SAI
Kočí, Eva (UACH-T) SAI, RID
Jakubec, Ivo (UACH-T) SAI, RID, ORCID
Zhigunov, Alexander (UMCH-V) RID, ORCID
Brovdyová, T. (CZ)
Bakardjieva, Snejana (UACH-T) SAI, RID, ORCIDSource Title Pure and Applied Chemistry. - : Walter de Gruyter - ISSN 0033-4545
Roč. 91, č. 11 (2019), s. 1733-1747Number of pages 15 s. Publication form Print - P Action International Conference on Solid State Chemistry /13./ Event date 16.09.2018 - 21.09.2018 VEvent location Pardubice Country CZ - Czech Republic Event type WRD Language eng - English Country DE - Germany Keywords nanovoids ; photoelectrochemistry ; SSC-2018 ; TiO2 microrods ; water splitting Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Subject RIV - cooperation Institute of Macromolecular Chemistry - Macromolecular Chemistry
Institute of Chemical Process Fundamentals - Inorganic ChemistryR&D Projects GA18-15613S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access with time embargo (26.11.2020) Institutional support UACH-T - RVO:61388980 ; UCHP-M - RVO:67985858 ; UMCH-V - RVO:61389013 UT WOS 000496795300004 EID SCOPUS 85072557034 DOI 10.1515/pac-2018-1116 Annotation This paper reports an original nonstandard green concept to obtain TiO2 microrods with polyhedral densely stacked 3D nanovoids prepared via the heat treatment of a hydrogen titanate. The intermediate hydrogen titanate was synthesized by a solid-liquid-solid (SLS) route from an ammonia-saturated aqueous solution of TiOSO4 at 0 °C. The effect of the postgrowth thermal annealing procedure to remove ice (water) and the proposed mechanism to explain the underlying transitions from the intermediate precursor to nanostructured TiO2 microrods with stacked 3D nanovoids were investigated. The small-angle X-ray scattering (SAXS) analysis indicates that at temperatures above 500 °C, the release of confined ice (water) takes place, which leads to the creation of self-assembled polyhedral nanovoids open to the surface. Their size ranges from 5 to 78 nm in both length and width, with a depth of ~3.88 nm. The first use of these stacked 1D TiO2 microrods as the working electrode in a photoelectrochemical (PEC) cell for water splitting is demonstrated. The estimated value of ζ-potential depends on both annealing temperature and crystallite size. Anatase sample 1D TiO/800 with ζ-potential (−29.1) mV and average crystallite size ~68 nm was observed to be highly stable in aqueous suspension. The SLS method yields low-cost 1D TiO2 materials possessing high photoreactivity with water. The PEC measurements indicate that three-dimensional hollow structures with a controlled geometry via patterned 1D TiO2 surface are promising materials for hydrogen generation from water splitting. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2020 Electronic address http://hdl.handle.net/11104/0302580
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