CeO_2掺杂TiO_2催化超声降解酸性大红的研究

Study on Ultrasonic Degradation of Acid Red on CeO_2-doped TiO_2 Catalyst

选取酸性大红染料为降解目标物,研究了用实验室合成的氧化铈掺杂二氧化钛为催化剂存在下的超声反应。研究结果表明,CeO2掺杂TiO2催化超声降解酸性大红的效果优于非掺杂的锐钛矿型TiO2的情况。在溶液pH1.0～3.0、酸性大红质量浓度为20mg/L、溶液用量50mL、催化剂用量0.5～1.0g/L的条件下,用输出功率5.0W/cm2和频率25kHz的超声波照射80min,酸性大红降解率可达97.3%。

The various affecting factors were studied on ultrasonic degradation of acid red in the presence of CeO2-doped TiO2 catalyst prepared in laboratory. The results indicated that the effects of ultrasonic degradationare more obvious in the presence of CeO2-doped TiO2 catalyst than in the presence of pure anatase TiO2 catalyst. Under the conditions of solution pH 1.043.0, acid red mass concentration 20 mg/L, solution volume 50 mL, catalyst dosage 0.5 - 1.0 g/L, irradiation power 5.0 W/cm^2, frequency 25 kHz, and irradiation time 80 min, the degradation rate of acid red can come up to 97.3 %.