Abstract:

The photocatalytic degradation of azo dye orange G by Sn(Ⅳ)doped TiO₂/AC photocatalyst has been investigated in a fluidized bed photoreactor and the optimum operation conditions have been evaluated. The results show that the optimum dosage of Sn(Ⅳ)doped is 2.5%. Under the condition of 12.5 g/L Sn(Ⅳ)/TiO₂/ AC, pH 2.00, H₂O₂ 1.5 mL/L and take the 300 W high pressure mercury lamp as the light source (main wavelength at 365 nm), the degradation efficiency of 50mg/L orange G can reach 99.1% after 1 h reaction. In addition, the co-existed negative ions, such as SO₄^2-and H₂PO₄-have negative effect on the degradation of orange G.

Key words: Sn(Ⅳ)/TiO₂/AC, photocatalytic degradation, orange G, dye wastewater

摘要：

采用Sn（Ⅳ）掺杂负载型纳米TiO₂/AC处理橙黄G偶氮染料废水，以橙黄G的去除率为指标，对光催化反应工艺条件进行了优化。结果表明：催化剂中Sn（Ⅳ）掺杂摩尔分数为2.5%，投加质量浓度为12.5 g/L，进水橙黄G质量浓度为50mg/L、pH为2.00，H₂O₂投加量为1.5 mL/L，主波长为365 nm的300 W高压汞灯光照条件下，反应1 h，橙黄G的去除率可达99.1%。废水中的共存阴离子SO₄^2-和H₂PO_4-，对橙黄G的光催化降解反应均有一定的抑制作用。

关键词: Sn（Ⅳ）/TiO₂/AC, 光催化降解, 橙黄G, 染料废水

CLC Number: 

• X791

• X703