在平面转盘光电液膜反应器的基础上,以纳米管TiO2代替溶胶凝胶法制备的TiO2纳米颗粒结构,以提高对染料废水的脱色效果。在0.5%HF体系和20 V电压下,采用阳极氧化法制得纳米管TiO2膜电极,根据光电响应试验的结果,选取120 min作为氧化时间。以RhB为目标污染物,应用转盘光电液膜反应器,在UV照射下进行脱色研究。结果表明在光催化和光电催化过程中,纳米管TiO2膜电极对RhB的脱色率分别达89%和94%,比溶胶凝胶电极分别提高了66%和10%。最佳脱色条件:转速为80 r/min,偏压为0.8 V。且在处理高浓度的RhB溶液时,纳米管电极的优势更加明显。
TiO2 nanotubes instead of nanoparticles structure can enhance decolorization efficiency of the rotating disk thin-film photoelectrocatalytic(PEC) reactor.In this paper,a TiO2 nanotubes electrode was prepared by anodization method(electrolyte condition: 0.5 % HF;adopted voltage: 20 V).According to the result of photocurrent response,120 min was chosen as the anodization time.RhB was used as objective pollutant and was treated using the reactor under UV light.In 60 min,as much as 89 % and 94 % of RhB are removed by photocatalytic and PEC,increasing by 66 % and 10 %,respectively.The best experimental conditions are: rotating speed = 80 r/min,bias potential = 0.8 V.And nanotubes electrode has more obvious advantages when RhB solution is at high concentration levels.