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

  1. 1.
    SYSNO ASEP0480144
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevCW-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, SAI
    Celkový počet autorů10
    Zdroj.dok.Journal of Inorganic and Organometallic Polymers and Materials. - : Springer - ISSN 1574-1443
    Roč. 27, č. 6 (2017), s. 1640-1648
    Poč.str.9 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovaCw CO2 laser heating ; IR laser imaging ; Silicon monoxide ; Solid state redox reactions ; Ti/Si/O composite ; Titanium monoxide
    Vědní obor RIVCA - Anorganická chemie
    Obor OECDInorganic and nuclear chemistry
    Vědní obor RIV – spolupráceÚstav chemických procesů - Průmyslová chemie a chemické inženýrství
    Institucionální podporaUACH-T - RVO:61388980 ; UCHP-M - RVO:67985858
    UT WOS000413145500004
    EID SCOPUS85023751464
    DOI10.1007/s10904-017-0624-7
    AnotaceSilica-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.
    PracovištěÚstav anorganické chemie
    KontaktJana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
    Rok sběru2018
Počet záznamů: 1  

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