磁性微球负载光催化剂失活特性及再生方法研究  

Characteristics of Deactivation and Regeneration of a Novel Magnetic Photocatalyst

作　　者：白先群[1] 黄耀峰[1] 朱开梅[1] 顾生玖[1] 

机构地区：[1]桂林医学院,广西桂林541004

出　　处：《环境科学与技术》2009年第9期36-38,共3页Environmental Science & Technology

基　　金：广西自然科学基金资助(桂科自0640190;0728229);桂林市科技攻关项目(科技攻关20070305;20080103-5)

摘　　要：TiO2/SiO2/Fe3O4在连续使用过程中存在失活现象并表现出吸附能力的降低,在实验基础上提出了超声波在线再生的解决方案;测试结果表明,TiO2/SiO2/Fe3O4在重复使用10次及连续使用130h条件下可保持其催化活性不变。For the first time, the adsorptive amounts of organic compounds on TiO2/SiO2/Fe3O4 in UV-irradiation process and the adsorption expression between TiO2/SiO2/Fe3O4 and residual organic compounds were obtained by a modified menstruation. It was proved that the specific adsorption of compounds on TiO2/SiO2/Fe3O4 during the irradiation period was different from that during dark period. The prime reason for deactivation of TiO2/SiO2/Fe3O4 in process was particle aggregation. Ultrasonic dispersion as an on-site regeneration for photocatalyst was proposed. Results showed that photoactivity of TiO2/SiO2/Fe3O4 could be changeless after being used whether 10 times repeatedly or 130h continuously.

关 键 词：磁性微球 失活现象 超声波分散 再生 

分 类 号：X132[环境科学与工程—环境科学]