Photocatalytic Degradation of Reactive Brilliant Red X-3B Based on Microwave Electrodeless Lamp and Long Lifetime Immobilized TiO2
A novel photocatalytic system (MEL/TiO2/QS) based on microwave electrodeless lamp (MEL) and TiO2 films
supported on quartz sheets (TiO2/QS) was established for high photocatalytic efficiency and long catalyst life. The results
showed that the degradation efficiency for reactive brilliant red X-3B in MEL/TiO2/QS was equally as that in a suspended
TiO2 system. Furthermore, under the microwave irradiation, the TiO2/QS had high catalytic activity after successively
used 10 times without additional separation and regeneration. The pseudo-first-order kinetics was employed to describe
decomposition of the dye and reaction rates at different initial dye concentrations, followed by the Langmuir–
Hinshelwood kinetic model. The mineralization process and final products were also analyzed by total organic carbon
(TOC) and ion chromatography (IC). The research might be useful in the commercial scale application of low cost and
high efficiency photocatalytic process.
Keywords: Catalyst regeneration, microwave electrodeless lamp, reactive brilliant red X-3B, TiO2 films.
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