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SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water
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SYSNO ASEP 0511968 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water Author(s) Bíbová, Hana (UFCH-W) RID
Hykrdová, Lenka (UFCH-W) RID, ORCID
Hoang, H. (VN)
Eliáš, M. (CZ)
Jirkovský, Jaromír (UFCH-W) RIDArticle number 2634398 Source Title Journal of Chemistry. - : Hindawi - ISSN 2090-9063
Roč. 2019, SEP 2019 (2019)Number of pages 11 s. Language eng - English Country US - United States Keywords oxalic-acid ; solar light ; degradation ; tio2 ; 4-chlorophenol ; nanoparticles ; graphite ; removal ; ammonia Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects LM2015073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000493181100001 EID SCOPUS 85074077289 DOI 10.1155/2019/2634398 Annotation In this study, we describe synthesis and characterization of a floating photocatalyst for water treatment consisting of a light substrate coated by SiO2/TiO2 composite. Three supports of natural origin were used: natural cork, expanded clay (Liapor), and volcanic porous glass (Sorbix). The photoactivity of the coated supports was tested in a laboratory photoreactor, with Liapor being the most photoactive support with good mechanical stability. The corresponding rate constant for the degradation of a model pollutant, 4-chlorophenol, was 7.8 x 10(-5) s(-1). Detail characterization of the coated Liapor was obtained by XRF, SEM/EDX, and UV-Vis diffuse reflectance spectroscopy, and surface area measurements. Outdoor experiments were carried out with calcined Liapor and oxalic acid or methylene blue under sunlight on pilot reactors in the Czech Republic and Vietnam. We demonstrated satisfactory photocatalytic activity, long-term stability, and reusability of the new floating photocatalyst. The photoefficiency to mineralize oxalic acid in water under sunlight was estimated as 6.7% under the applied conditions. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2020 Electronic address http://hdl.handle.net/11104/0302201
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