The microwave-assisted photo-catalytic degradation of organic dyes

摘要

In this study, TiO2 photo-catalyst balls produced by the chemical vapour deposition method werenused for degradation of organic dyes in which simultaneous irradiation of microwave and UV wasnevaluated. An electrodeless UV lamp that emits UV upon the irradiation of microwave wasndeveloped to irradiate microwave and UV simultaneously. The degradation reaction rate wasnshown to be higher with higher microwave intensity, under stronger acidic or basic conditions,nand with a larger amount of O2 gas or H2O2 addition. The effect of addition of H2O2 was notnsignificant when photo-catalysis was used without additional microwave irradiation or whennmicrowave was irradiated without the use of photo-catalysts. When H2O2 was added undernsimultaneous use of photo-catalysis and microwave irradiation, however, considerably higherndegradation reaction rates were observed.