Resumo (PT):
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.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
9