蠕虫状TiO_2的制备及光催化性能研究

Synthesis and Photocatalytic Properties of Vermicular TiO_2

采用水热法一步合成了蠕虫状的TiO_2,应用扫描电镜(SEM)、X射线衍射(XRD)、紫外-可见光光度计(UVVis)对其形貌、结构进行了表征和分析,考察了NaOH浓度、不同钛源对TiO_2形貌的影响,并研究了它们的光催化性能。结果表明:蠕虫状的TiO_2为锐钛矿相,是由小纳米颗粒自组装形成的蠕虫状结构,NaOH浓度对TiO_2形貌影响较大。以甲基橙为模拟污染物研究样品的光催化性能,在紫外光照射下,表现出良好的光催化活性。

Vermicular TiO2 microspheres were successfully synthesized via a solvothermal method.The TiO2 microspheres were characterized and analyzed by X-ray diffraction(XRD),electron microscope scanning(SEM)and the ultraviolet and visible light spectrophotometer(UV-Vis).Properties were analyzed by different NaOH concentration and titanium source on the sample.The results show that TiO2 microspheres are anatase,which is the form of vermicular composed of nano crystalline.The NaOH concentration has effect on the morphology of TiO2.The photocatalytic degradation performance is evaluated under the condition of methyl orange(MO)simulating wastewater.The prepared samples functioned as a highly active photocatalysis under the irradiation of ultraviolet degradation.