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Surface properties of 1DTiO2 microrods modified with copper (Cu) and nanocavities
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SYSNO ASEP 0539968 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Surface properties of 1DTiO2 microrods modified with copper (Cu) and nanocavities Author(s) Bakardjieva, Snejana (UACH-T) SAI, RID, ORCID
Mamoň, Filip (UACH-T) SAI, RID
Pinc, Z. (CZ)
Fajgar, Radek (UCHP-M) RID, ORCID, SAI
Jakubec, Ivo (UACH-T) SAI, RID, ORCID
Murafa, Nataliya (UACH-T) RID, SAI
Kočí, Eva (UACH-T) SAI, RID
Brovdyová, T. (CZ)
Lančok, Adriana (FZU-D) RID
Michna, S. (CZ)
Nikolova, R. (BG)Number of authors 11 Article number 324 Source Title Nanomaterials. - : MDPI
Roč. 11, č. 2 (2021)Number of pages 24 s. Language eng - English Country CH - Switzerland Keywords Cu doping ; Lyophilization ; Microrods ; Surface structure ; Titanium dioxide Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Subject RIV - cooperation Institute of Chemical Process Fundamentals - Physical ; Theoretical Chemistry
Institute of Physics - Solid Matter Physics ; MagnetismR&D Projects GA18-15613S GA ČR - Czech Science Foundation (CSF) LM2018124 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UACH-T - RVO:61388980 ; UCHP-M - RVO:67985858 ; FZU-D - RVO:68378271 UT WOS 000622926100001 EID SCOPUS 85100490230 DOI 10.3390/nano11020324 Annotation This work deals with Cu-modified 1DTiO2 microrods (MRs) and their surface properties. The pristine lyophilized precursor Cu_1DTiO2, prepared by an environmentally friendly cryo-lyophilization method, was further annealed in the temperature interval from 500 to 950 °C. The microstructure of all samples was characterized by electron microscopy (SEM/EDS and HRTEM/SAED), X-ray powder diffraction (XRD), infrared spectroscopy, simultaneous DTA/TGA thermoanalytical measurement, and mass spectroscopy (MS). Special attention was paid to the surface structure and porosity. The 1D morphology of all annealed samples was preserved, but their surface roughness varied due to anatase-rutile phase transformation and the change of the nanocrystals habits due to nanocavities formation after releasing of confined ice-water. The introduction of 2 wt.% Cu as electronically active second species significantly reduced the direct bandgap of 1DTiO2 in comparison with undoped TiO2 and the standard Degussa TiO2_P25. All samples were tested for their UV absorption properties and H2 generation by PEC water splitting. We presented a detailed study on the surface characteristics of Cu doped 1DTiO2 MRs due to gain a better idea of their photocatalytic activity. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0317653
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