Abstract: The activity，deactivation，activity regeneration of amorphous TiO2/WO3 films were studied via photocatalytic oxidation of methyl blue. The photodegradation ratio of methyl blue was 93.8% by fresh TiO2/WO3 films. Having been used for six times，the photodegradation ratio was still higher than 85%. For the deactivated films after reused for nine times，four methods were attempted to regenerate the activity，soaking in water or ethanol for 30 minutes and ultrasonic treatment in distilled water or ethanol for 30 minutes，with which the photodegradation ratio could be resumed from 10.3% to 23.2%，28.3%，79.2% and 90.5% respectively.

摘要： 研究了非晶态TiO2/WO3薄膜降解亚甲基蓝的光催化活性、失活及活性再生等问题。在本实验条件下，新制非晶态TiO2/WO3薄膜对亚甲基蓝的降解率为93.8%。试验表明，使用6次后其对亚甲基蓝的降解率仍可达85%以上，经10次使用后薄膜基本丧失光催化活性。对于失活的光催化薄膜，分别采用（a）蒸馏水浸泡30 min、（b）乙醇浸泡30 min、（c）蒸馏水超声处理30 min、（d）乙醇中超声处理30 min对其进行活性再生实验。上述4种方法可将使用9次后的光催化膜对亚甲基蓝的降解率从10.3%分别恢复至23.2%、28.3%、79.2%、90.5%。