Abstract: Mineralization of phenol was investigated under visible light irradiation by using the catalyst cerium doped nano-TiO2（named as Ce-TiO2）. Degradation of phenol in different reaction systems was discussed，and the influences of reaction conditions，such as phenol concentration，solution pH，catalyst dosage and reaction temperature were also evaluated. The catalytic results showed that 35.8% TOC removal of phenol were achieved under visible irradiation at a reaction condition of cerium doped amount of 1.00%，calcination temperature at 700 ℃，calcination time for 3 h，pH 5 and 1.0 g/L catalyst dosage.

Key words: nano-TiO2, cerium doped, visible light irradiation, phenol

摘要： 采用Ce(NO3)3掺杂改性后的纳米TiO2粉末作为光催化剂（Ce-TiO2），研究了Ce-TiO2 在可见光条件下光催化降解苯酚的过程，考察了Ce掺杂量、焙烧温度、焙烧时间、pH值以及催化剂用量等因素对苯酚溶液光催化降解过程的影响。结果表明：可见光照射下，当Ce掺杂量为1.00 %、焙烧温度为700 ℃、焙烧时间为3 h、反应溶液pH值为5、催化剂投加量为1.0 g/L时，苯酚的去除率达到最佳，为35.8%。

关键词: 纳米TiO2, Ce掺杂, 可见光, 苯酚