摘要
为了解决水体中光催化剂的分离和回收问题,对纳米TiO2的改性和固载化及其光催化特性进行了研究。首先以纳米TiO2为原料,采用水热合成法制备TiO2纳米管;再对TiO2纳米管硅烷化,改善其表面性质;然后以聚氨酯(PU)膜片为载体负载TiO2纳米管,制成了负载型PU/TiO2薄膜的光催化材料。采用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、衰减全反射傅里叶变换红外光谱(ATR-FTIR)和扫描电子显微镜(SEM)等手段对催化剂进行了表征,结果表明硅烷化后的TiO2纳米管能很好地接枝在PU薄膜表面。以300 W高压汞灯为光源,萘普生为目标降解物,研究了负载PU/TiO2薄膜的光催化活性和稳定性,结果表明其对目标物的降解具有较高活性,用乙醇冲洗即可多次重复使用,其催化活性能较长时间保持稳定。
In order to solve the problem of separation and recovery of photocatalyst in water,the modification, immobilization and photocatalytic properties of TiO2 were studied.Firstly,TiO2 nanotubes were successfully synthe-sized by a hydrothermal method and silylated to improve its surface properties.Then,TiO2 nanotubes supported on polyurethane membrane were prepared to produce PU/TiO2 .Catalysts were characterized by XRD,FTIR,ATR-FT-IR and SEM.The results showed that silylated TiO2 nanotubes can graft well on the surface of the PU film.With a 300 W high pressure mercury lamp as light source,the photocatalytic activity and stability of composite materials for degrading naproxen were investigated.Experiments showed that the degradation of the target by PU/TiO2 photocata-lyst is highly active and the catalytic performance can remain stable for a long time by means of washing materials with ethanol.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2015年第15期149-153,共5页
Materials Reports
基金
贵州省科学技术基金(黔科合J字[2013]2005号)
贵州省高校优秀科技创新人才支持计划(黔教合KY字[2013]150)
毕节学院高层次人才科学研究项目(院科合字G2013005号)
国家自然科学基金(21377031)
关键词
聚氨酯
硅烷偶联剂
TIO2纳米管
萘普生
光催化
polyurethane membrane
silane coupling agent
TiO2 nanotube
naproxen
photocatalysis
