Abstract
本研究以ZnO為光催化劑探討以光催化程序處理Reactive Red (RR239)之脫色速率。脫色反應可以用以下幾個參數的數學式來表示，包含UV光的強度、pH值、光催化劑的含量及攪拌速度。經由DOE實驗設計法所得到之最佳催化參數為：UV光強度：15.1 W/m2；ZnO濃度：4.34 g/L；起始pH值：2.6；及攪拌速度：855 rpm。在此條件下，可以達到之最大脫色率為99.98%。此外，我們也以此最佳脫色條件，針對diazo(Reactive Yellow 84(RY84))、triazo (Direct Back 166(DBK166))、及Polyazo(Direct Black 22(DBK22))進行光催化脫色實驗。實驗結果顯示，UV/ZnO的光催化程序對RR239有較高的脫色效率。
Photocatalyic decolonization of Reactive Red 239 (RR239), a textile monoazo dye, was investigated in aqueous suspensions containing ZnO as a photocatalyst. The reaction can be mathematically described as a function of several parameters, including UV light intensity, initial pH, amount of photocatalyst, and stirring speed, using Design of Experiments (DOE). The optimal values for these four parameters were determined as follows: UV light intensity: 15.1W/m2; ZnO concentration: 4.34 g/L; initial pH: 2.6; and stirred speed: 855 rpm. Under this condition, the maximal decolorization efficiency of 99.98% can be achieved. Furthermore, photocatalytic decolorization of diazo (Reactive Yellow 84 (RY84)), triazo (Direct Black 166 (DBK 166)), and ployazo dyes (Direct Black 22 (DBK22)) were also investigated under the optimized condition of RR239. The experimental results show that the UV/ZnO photocatalytic process exhibits slightly greater decolorization efficiency with RR239 than the other dyes.
Photocatalyic decolonization of Reactive Red 239 (RR239), a textile monoazo dye, was investigated in aqueous suspensions containing ZnO as a photocatalyst. The reaction can be mathematically described as a function of several parameters, including UV light intensity, initial pH, amount of photocatalyst, and stirring speed, using Design of Experiments (DOE). The optimal values for these four parameters were determined as follows: UV light intensity: 15.1W/m2; ZnO concentration: 4.34 g/L; initial pH: 2.6; and stirred speed: 855 rpm. Under this condition, the maximal decolorization efficiency of 99.98% can be achieved. Furthermore, photocatalytic decolorization of diazo (Reactive Yellow 84 (RY84)), triazo (Direct Black 166 (DBK 166)), and ployazo dyes (Direct Black 22 (DBK22)) were also investigated under the optimized condition of RR239. The experimental results show that the UV/ZnO photocatalytic process exhibits slightly greater decolorization efficiency with RR239 than the other dyes.
| Original language | American English |
|---|---|
| Pages (from-to) | 289-298 |
| Journal | Journal of the Chinese Institute of Chemical Engineers |
| Volume | 37 |
| Issue number | 3 |
| State | Published - 2006 |