碳掺杂的二氧化钛纳米管的制备及其可见光催化性能

以尿素作为碳元素前驱体对TiO2纳米管进行掺杂，采用比表面积测定、X射线衍射、透射电子显微镜、能量色散X射线荧光光谱、X射线光电子能谱、固体漫反射紫外-可见吸收光谱和荧光光谱对产物进行了表征。 结果表明，以尿素作为前驱体可制备C掺杂的TiO2纳米管，C掺杂后，TiO2纳米管的可见光催化活性明显提高。 此外，研究了C掺杂量、煅烧温度、催化剂用量和pH值对TiO2纳米管光催化降解活性的影响，发现当C的掺杂量为5.3%、催化剂用量为1.5 g/L、溶液的pH值为5时，在其催化作用下，可见光光照3 h后罗丹明B的降解率可达到91%。

Preparation and Visible Light Photocatalytic Activity of Carbon Doped Titanium Dioxide Nanotubes

Urea was used as a precursor of carbon to prepare carbon doped TiO2 nanotubes. The products obtained were characterized with Brunauer-Emmett-Teller surface area measurement(BET), X-ray diffraction(XRD), transmission electron microscopy(TEM), energy dispersive X-ray fluoresence spectroscopy(EDX), X-ray photoelectron spectroscopy(XPS), solid diffuse reflection UV-Vis spectroscopy(DRS) and fluorescence spectroscopy. The results showed that the visible light photocatalytic activity of the TiO2 nanotubes was improved obviously after doping C. In addition, the influences of doping amount of C, calcination temperature, dosage of catalyst and pH on the photocatalytic degradation activity of the TiO2 nanotubes were investigated. The degradation efficiency of rodamine B could reach 91% under 3 h visible light irradiation when the amount of doping C was 5.3%, calcination temperature was 400 ℃, dosage of catalyst was 1.5 g/L, pH of solution was 5.