Photocatalytic Degradation of Reactive Brilliant Red X-3B Based on Microwave Electrodeless Lamp and Long Lifetime Immobilized Ti0_2

摘要

A novel photocatalytic system (MEL/Ti02/QS) based on microwave electrodeless lamp (MEL) and Ti0_2 films supported on quartz sheets (TiO_2/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/TiO_2/QS was equally as that in a suspended Ti02 system. Furthermore, under the microwave irradiation, the Ti0_2/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.