Pt/TiO_2纳米管的制备及光催化性能探究

Preparation and photocatalytic performance research of double-deck hierarchical Pt/TiO_2

采用原位阳极二次氧化法,在钛基底上制得双层分级结构TiO2纳米管,采用SEM、XRD和UV-DRS等对样品的表面形貌、晶型和紫外-可见吸收光谱进行了表征,并通过傅里叶红外光谱考量光催化降解甲醛的氧化产物来研究掺杂Pt前后的阵列式TiO2纳米管的光催化性能。结果表明,负载Pt后的双层分级结构TiO2纳米管吸收光谱范围增加,其光响应范围增大,并由于肖特基结的作用阻止了电子-空穴的复合几率,使得其光催化性能大大增强。

By one in-situ anodic oxidation two-step method,double-deck hierarchical TiO2 nanotubes was produced on one base of pure titanium.its surface morphology,crystal structure and absorption spectra were examined separately through FESEM,XRD and UV-DRS.Furthermore,We tested the photocatalytic performances of TiO2 nanotube arrays before and after Pt decoration via photocatalytic degradation of methanal,whose oxidation products infrared spectrum were measured by FTIR.The interesting findings presented that Pt/TiO2 nanotubes possessed much broader range of absorption spectrum,which highly extended the light response scope,meanwhile,as a result of schottky junction,Pt/TiO2 nanotubes showed greater photocatalytic properties.