Počet záznamů: 1
CW-Laser-Induced Solid-State Reactions in Mixed Micron-Sized Particles of Silicon Monoxide and Titanium Monoxide: Nano-Structured Composite with Visible Light Absorption
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SYSNO ASEP 0480144 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název CW-Laser-Induced Solid-State Reactions in Mixed Micron-Sized Particles of Silicon Monoxide and Titanium Monoxide: Nano-Structured Composite with Visible Light Absorption Tvůrce(i) Křenek, T. (CZ)
Tesař, J. (CZ)
Kupčík, Jaroslav (UACH-T) SAI, RID, ORCID
Netrvalová, M. (CZ)
Pola, M. (CZ)
Jandová, Věra (UCHP-M) RID, ORCID, SAI
Pokorná, Dana (UCHP-M) RID, SAI
Cuřínová, Petra (UCHP-M) RID, SAI, ORCID
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Pola, Josef (UCHP-M) RID, ORCID, SAICelkový počet autorů 10 Zdroj.dok. Journal of Inorganic and Organometallic Polymers and Materials. - : Springer - ISSN 1574-1443
Roč. 27, č. 6 (2017), s. 1640-1648Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Cw CO2 laser heating ; IR laser imaging ; Silicon monoxide ; Solid state redox reactions ; Ti/Si/O composite ; Titanium monoxide Vědní obor RIV CA - Anorganická chemie Obor OECD Inorganic and nuclear chemistry Vědní obor RIV – spolupráce Ústav chemických procesů - Průmyslová chemie a chemické inženýrství Institucionální podpora UACH-T - RVO:61388980 ; UCHP-M - RVO:67985858 UT WOS 000413145500004 EID SCOPUS 85023751464 DOI 10.1007/s10904-017-0624-7 Anotace Silica-titania mixed oxides and composites have been broadly examined for their physical and catalytic properties, but titanium monoxide-silicon monoxide counterparts have yet drawn very little attention. Here we report that laser-induced processing of mixed silicon and titanium monoxides results in reactions yielding a nanostructured Ti/Si/O composite absorbing visible light. Changes in the composition of intimately mixed mu m-sized particles of silicon monoxide (SiO) and titanium monoxide (TiO) induced by scanning of a cw CO2 laser beam along the TiO-SiO pellet surface were examined by FTIR and Raman spectroscopy, X-ray diffraction and electron microscopy. They are shown to consist in the evolution of TiO2 (rutile and anatase), titanium suboxides (Ti4.5O5, Ti2O3), silica and amorphous binary SiOx, TiOx and ternary SixTiyOz nano-phases which contain less or more O than SiO and TiO monoxides. These products are ascribed to concurrent silicothermal reduction of TiO and O-transfer between SiO and TiO due to interdiffusion of Si- and Ti-based species. These reactions taking place under transient localized heating are not inhibited by passivation shells around SiO and TiO particles. The laser-produced Ti/Si/O composite shows absorption band at 425 nm tailing up to 1100 nm. Its solar-light photocatalytic activity in decolorization of Methylene Blue is compared to that of the unheated SiO and TiO powders absorbing only in UV region. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2018
Počet záznamů: 1