CW-Laser-Induced Solid-State Reactions in Mixed Micron-Sized Particles of Silicon Monoxide and Titanium Monoxide: Nano-Structured Composite with Visible Light Absorption

Křenek, T.; Tesař, J.; Kupčík, Jaroslav; Netrvalová, M.; Pola, M.; Jandová, Věra; Pokorná, Dana; Cuřínová, Petra; Bezdička, Petr; Pola, Josef

doi:https://dx.doi.org/10.1007/s10904-017-0624-7

Number of the records: 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
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	CW-Laser-Induced Solid-State Reactions in Mixed Micron-Sized Particles of Silicon Monoxide and Titanium Monoxide: Nano-Structured Composite with Visible Light Absorption
Author(s)	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}
Number of authors	10
Source Title	Journal of Inorganic and Organometallic Polymers and Materials. - : Springer - ISSN 1574-1443 Roč. 27, č. 6 (2017), s. 1640-1648
Number of pages	9 s.
Language	eng - English
Country	US - United States
Keywords	Cw CO2 laser heating ; IR laser imaging ; Silicon monoxide ; Solid state redox reactions ; Ti/Si/O composite ; Titanium monoxide
Subject RIV	CA - Inorganic Chemistry
OECD category	Inorganic and nuclear chemistry
Subject RIV - cooperation	Institute of Chemical Process Fundamentals - Industrial Chemistry, Chemical Engineering
Institutional support	UACH-T - RVO:61388980 ; UCHP-M - RVO:67985858
UT WOS	000413145500004
EID SCOPUS	85023751464
DOI	10.1007/s10904-017-0624-7
Annotation	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.
Workplace	Institute of Inorganic Chemistry
Contact	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Year of Publishing	2018

Number of the records: 1