CAJ | 학술논문

以300W汞灯为光源，纳米TiO2为光催化剂，甲基橙为目标降解物，以分光光度法测定其脱色率，以重铬酸钾法测定其COD降解率，研究了在不同溶液pH值、甲基橙初始浓度及TiO2投加量等条件下的甲基橙光催化降解效率．结果表明，甲基橙溶液脱色率和COD降解率并不一致，脱色比COD降解更容易发生；将脱色率、COD降解率等指标的变化综合考虑，才能更全面准确地判断光催化反应的效率．
이300W홍등위광원，납미TiO2위광최화제，갑기등위목표강해물，이분광광도법측정기탈색솔，이중락산갑법측정기COD강해솔，연구료재불동용액pH치、갑기등초시농도급TiO2투가량등조건하적갑기등광최화강해효솔．결과표명，갑기등용액탈색솔화COD강해솔병불일치，탈색비COD강해경용역발생；장탈색솔、COD강해솔등지표적변화종합고필，재능경전면준학지판단광최화반응적효솔．
Using 300 W mercury lamp as light source, nano-TiO2 as photocatalyst and methyl orange as degradant, we measured the decolorization rate by UV/Vis spectroscopy and COD degradation rate by potassium dichromate method. The efficiency of photocatalytic degradation of methyl orange at different pH values, the initial concentration of methyl orange and TiO2 dosage were studied. The results showed that the decolorization rate of methyl orange solution and COD degradation rate were not consistent, and the decolorization was more likely to occur than the COD degradation. Only when we consider the decolorization rate together with the COD degradation rate, can we determine the efficiency of photocatalytic reaction more fully and accurately.