Co掺杂的TiO_2纳米管的光解水制氢性能研究

A Study on Photohydrogenation Properties of Co-Doped TiO_2 Nanotubes

采用一个简单的水热法制备了Co掺杂的TiO_2纳米管,并用HRTEM、XPS、XRD、Raman和UV-vis DRS技术对催化剂进行了表征。研究表明,随着Co掺杂量的提高,TiO_2纳米管在可见光区的吸收明显增强,禁带宽度不断变窄,由3.19 eV逐渐减小至3.02 eV。TiO_2纳米管前驱体的光解水制氢速率为478μmol h-1 g-1,Co掺杂的TiO_2纳米管的光解水制氢速率获得了显著提升,其中Ti0.94Co0.06O2纳米管的光解水制氢速率最高,为1048μmol h^(-1)g^(-1)。

The co-doped TiO2 nanotubes are prepared by adopting a simple hydrothermal method,and the catalysts are characterized by the techniques of HRTEM,XPS,XRD,Raman and UV-vis DRS.The results show that the absorption of TiO2 nanotubes is obviously enhanced in the visible region with the increasing Co doping amounts,and the band width is gradually narrowed from 3.19 eV to 3.02 eV.The H2production rate of TiO2 nanotube precursor is 478 μmol h^-1g^-1,while the hotohydrogenation rate of co-doped TiO2 nanotubes is significantly improved,among which the hotohydrogenation rate of Ti0.94Co0.06O2 nanotubes is the highest with1048 μmol h^-1g^-1.