Prototyping of meso- and microfluidic devices with embedded TiO2 photocatalyst for photodegradation of an organic dye

Druval S. De Sá; Bojan A. Marinkovic; Eric C. Romani; Tommaso Del Rosso; Rodrigo O. M. A. de Souza; Alessandro Massi; Omar Pandoli

doi:10.1556/1846.2015.00043

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Journal of Flow Chemistry

Volume/Issue:: Volume 6: Issue 2

Prototyping of meso- and microfluidic devices with embedded TiO₂ photocatalyst for photodegradation of an organic dye

Authors:

Druval S. De Sá

Druval S. De Sá Pontificia Universidade Católica, PUC-Rio, Rio de Janeiro, 22451-900, Brazil

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Bojan A. Marinkovic

Bojan A. Marinkovic Pontificia Universidade Católica, PUC-Rio, Rio de Janeiro, 22451-900, Brazil

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Eric C. Romani

Eric C. Romani Pontificia Universidade Católica, PUC-Rio, Rio de Janeiro, 22451-900, Brazil

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Tommaso Del Rosso

Tommaso Del Rosso Pontificia Universidade Católica, PUC-Rio, Rio de Janeiro, 22451-900, Brazil

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Rodrigo O. M. A. de Souza

Rodrigo O. M. A. de Souza Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, 22451-900, Brazil

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Alessandro Massi

Alessandro Massi Universitá di Ferrara, UNIFE, Ferrara, Italy

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Omar Pandoli

Omar Pandoli Pontificia Universidade Católica, PUC-Rio, Rio de Janeiro, 22451-900, Brazil

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omarpandoli@puc-rio.br

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Pages:: 101–109

Online Publication Date:: Jun 2016

Publication Date:: 01 Jun 2016

Article Category:: Research Article

DOI:: https://doi.org/10.1556/1846.2015.00043

Keywords:: flow reactor; photocatalysis; rhodamine B; composite; confocal Raman microscopy

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We present prototyping of meso- and microfluidic photocatalytic devices, functionalized through incorporation of TiO₂ nanoparticles in polydimethylsiloxane (PDMS), and comparison of their efficiencies for the degradation of rhodamine B (10⁻⁵ mol/L). The prototyping of the photocatalytic devices involves simple and low-cost procedures, which includes microchannels fabrication on PDMS, deposition and impregnation of TiO₂ on PDMS, and, finally, plugging on the individual parts. For the microfluidic device with 13 μL internal volume, photocatalytic TiO₂–PDMS composite was sealed by another PDMS component activated by O₂ plasma (PDMS–TiO₂–PDMS). For the mesofluidic device, a homemade polyetheretherketone (PEEK) flow cell with 800 μL internal volume was screwed on a steel support with a glass slide and the photocatalytic composite. The photocatalytic activities of the devices were evaluated using two different pumping flow systems: a peristaltic pump and a syringe pump, both at 0.05 mL/min under the action of 365 nm ultraviolet (UV) light. The characterization of TiO₂–PDMS composite was performed by confocal Raman microscopy, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The photocatalytic microreactor was the most efficient, showing high organic dye photodegradation (88.4% at 12.5 mW/cm²).

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Journal of Flow Chemistry A Journal of the Flow Chemistry Society

Print ISSN:: 2062-249X

Online ISSN:: 2063-0212

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Journal of Flow Chemistry
Language	English
Size	A4
Year of Foundation	2011
Volumes per Year	1
Issues per Year	4
Founder	Áramlásos Kémiai Tudományos Társaság
Founder's Address	H-1031 Budapest, Hungary Záhony utca 7.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	2062-249X (Print)
ISSN	2063-0212 (Online)