Al^(3+)-SiO_2共掺杂TiO_2光催化膜的制备及超亲水改性  

Preparation and super hydrophilic modification of Al^(3+)-SiO)2 codoping TiO_2 photocatalytic film

作　　者：崔晋梅[1] 郭宪英[1] 逄奉建[1] 

机构地区：[1]青岛大学化学化工与环境学院,青岛266071

出　　处：《化工新型材料》2011年第6期105-108,共4页New Chemical Materials

摘　　要：为了提高TiO2光催化薄膜的利用效率,实验采用金属离子Al3+和氧化物SiO2共掺杂的方法,制备以TiO2为基体的复合光催化薄膜。利用简单易行的溶胶-凝胶法结合超声分散技术以两种不同的方式,一种是同步将Al3+和SiO2共掺杂于TiO2溶胶中,制备多元素共掺杂混合溶胶,采用浸渍提拉的方法以玻璃片为载体涂膜,然后运用马弗炉进行热处理制得产品。另一种是利用SiO2对Al3+掺杂TiO2进行表面处理改性,热处理后制得产品。将所得产品进行接触角、紫外-可见分光光度计、红外、SEM、AFM测试,对其性能进行表征。结果表明:Al3+掺杂量为0.3g时,TiO2复合光催化膜效果最好;经过SiO2表面处理过的Al3+/TiO2复合光催化膜的超亲水性最好;Al3+掺杂TiO2提高了其吸光性能;复合光催化膜的透过率可达80%~90%,透明度较高。To improve the TiO2 photocatalytic thin film efficiency,the experiment used metal ions Al3＋ and SiO2 doping to prepare the composite TiO2 photocatalytic film.Using a simple sol-gel and ultrasonic dispersion in two different ways,one was synchronized Al3＋ and SiO2 doped TiO2 sol was prepared by multi-element doped hybrid sol,by dipping,glass as the carrier film,and then using a muffle furnace for heat treatment obtained products.One was the use of SiO2 surface treatment modification the Al3＋ doped TiO2 film,after heat treatment were products.The final product will be tested by the contact angle,UV-Vis,IR,SEM and AFM to characterize its performance.The results showed when the Al3＋ doping content of 0.3g,TiO2 composite photocatalytis film was best;through the SiO2 surface treated Al3＋ / TiO2 composite photocatalytic film superhydrophilicity was best;Al3＋doped TiO2 to improve the performance of its absorption.Transmittance of Composite photo-catalytic film was up to 80%-90%,they had higher degree of transparency.

关 键 词：溶胶-凝胶法 TiO2光催化膜 共掺杂 改性 

分 类 号：TQ134.11[化学工程—无机化工]