Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO2 and TiO2-graphene

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Natan Padoin (Author) Other; Luísa Andrade (Author) FEUP; Joana Ângelo (Author) FEUP; Adélio Mendes (Author) FEUP; Regina de Fátima Peralta Muniz Moreira (Author) Other; Cíntia Soares (Author) Other

Journal

Title: AICHE Journal

Vol. 62 No. 8

Pages: 2794-2802

ISSN: 0001-1541

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 10 Citations

ISI Web of Science

Scopus - 16 Citations

Scientific classification

CORDIS: Technological sciences

Associated Projects

BI-DSC - Building Integrated Dye Sensitized Solar Cells

FCT/CAPES 4.4.1.00.01/2012 - Desenvolvimento de caraterização de fotocatalisadores compósitos de dióxido de titânio-grafeno

Other information

Authenticus ID: P-00K-WQF

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9