Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO2 and TiO2-graphene
A microfluidic device was applied to the photocatalytic degradation of methylene blue as a model pollutant. Titanium dioxide nanoparticles (TiO2–P25) and a synthesized composite TiO2‐graphene catalyst were immobilized on the inner walls of a borosilicate glass microfluidic chip. The deposition evolu...
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Published in | AIChE journal Vol. 62; no. 8; pp. 2794 - 2802 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Blackwell Publishing Ltd
01.08.2016
American Institute of Chemical Engineers |
Subjects | |
Online Access | Get full text |
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Summary: | A microfluidic device was applied to the photocatalytic degradation of methylene blue as a model pollutant. Titanium dioxide nanoparticles (TiO2–P25) and a synthesized composite TiO2‐graphene catalyst were immobilized on the inner walls of a borosilicate glass microfluidic chip. The deposition evolution of the nanoparticles was evaluated by monitoring the optical profile of the system. It was found that a higher initial reaction rate was obtained in the microreactor containing composite catalyst (TiO2‐GR) on the inner walls, but both systems (TiO2 and TiO2‐GR) achieved similar reaction rates when the steady‐state was reached. Decolorization rate of methylene blue in our microfluidic chips was found to be approximately one order of magnitude higher than equivalent macroscopic systems reported in the literature at similar experimental conditions. Additionally, computational simulations were performed to investigate the physics involved in these processes. The model was experimentally validated for further scale‐out studies. © 2016 American Institute of Chemical Engineers AIChE J, 62: 2794–2802, 2016 |
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Bibliography: | Portuguese Foundation for Science and Technology (FCT) - No. 8879-14-1; No. 140521/2014-3; No. SFRH/BD/79974/2011 istex:F99788497EC934C775BA9D8DBB6E5BAE29AC315E European Research Council ark:/67375/WNG-JTP3L43J-8 ArticleID:AIC15262 CAPES |
ISSN: | 0001-1541 1547-5905 |
DOI: | 10.1002/aic.15262 |