Počet záznamů: 1
An aerogel-based photocatalytic microreactor driven by light guiding for degradation of toxic pollutants
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SYSNO ASEP 0549489 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název An aerogel-based photocatalytic microreactor driven by light guiding for degradation of toxic pollutants Tvůrce(i) Őzbakir, Y. (TR)
Jonáš, Alexandr (UPT-D) RID, SAI, ORCID
Kiraz, A. (TR)
Erkey, C. (TR)Celkový počet autorů 4 Číslo článku 128108 Zdroj.dok. Chemical Engineering Journal. - : Elsevier - ISSN 1385-8947
Roč. 409, 1 April (2021)Poč.str. 11 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Photocatalytic microreactors ; Optofluidic waveguides ; Total internal reflection ; Nanoporous solid-air aerogels ; Silica-titania composite aerogels ; Photocatalytic degradation Vědní obor RIV BH - Optika, masery a lasery Obor OECD Optics (including laser optics and quantum optics) Způsob publikování Open access Institucionální podpora UPT-D - RVO:68081731 UT WOS 000618082100006 EID SCOPUS 85098938346 DOI 10.1016/j.cej.2020.128108 Anotace Efficient utilization of light in photocatalytic chemical processes requires careful optimization of the photocatalytic reactor layout to maximize the interaction between the incident light, photocatalyst and reactant molecules. Herein, we report a new type of photocatalytic flow microreactor with an integrated light guide, formed by a channel fabricated inside a hydrophobic composite aerogel monolith made of silica and titania (TiO2). The liquid-filled channel simultaneously acts as a reaction vessel and as a liquid-core optofluidic waveguide, distributing the incident light over the whole reaction volume. Anatase TiO2 nanoparticles embedded in the channel walls then serve as a photocatalyst that can efficiently interact with both the guided light and the reactant solution along the channel length. Composite aerogels were synthesized with TiO2 content between 1 and 50 wt %, retaining their interconnected mesoporous network, low refractive index, and waveguide propagation losses below3.9 dB/cm over this range of compositions. Using photocatalytic degradation of phenol an organic compound with harmful environmental effects as a model chemical reaction, the performance of the microreactor was systematically investigated. Reactant conversion was observed to increase with increasing incident light power, decreasing reactant flow rate and increasing mass fraction of TiO2 in the composite. An analytical model of the reactor/light guide system was developed that predicted successfully the scaling of the reactant conversion with the incident light power and reactant flow rate. The presented concept of aerogel-based optofluidic photocatalytic microreactors is readily scalable and possesses great potential for carrying out other photocatalytic reactions in both polar and non-polar solvents. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S1385894720342248?via%3Dihub
Počet záznamů: 1