TiO_2中空微球的制备及性能

Synthesis and Properties of TiO_2 Hollow Microspheres

以钛酸丁酯为钛源,采用无模板溶剂热法合成了Ti O_2中空微球,并采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、N_2物理吸附-脱附(BET)对样品进行了表征和分析,以甲基橙为模拟污水考察了样品光催化降解甲基橙的能力。结果表明,Ti O_2中空微球为锐钛矿相,是由细小的纳米晶自组装形成的具有中空结构的Ti O_2微球,微球的直径为0.4~0.5μm,样品的比表面积为60 m^2/g。在8 W紫外灯照射下,将Ti O_2中空微球加到初始溶度为15 mg/L的甲基橙溶液中,在光照80 min后甲基橙降解率达到95%,表现出良好的光催化活性。

Ti O2hollow microspheres were synthesized via a solvothermal method using tetrabutyl titanate as precursor.The samples were characterized and analyzed by X-ray diffraction（XRD）,scanning electron microscope（SEM）,transmission electron microscope（TEM）,and N2adsorption-desorption（BET）.The photocatalytic property of Ti O2hollow microspheres was evaluated by decomposing methyl orange（MO）in simulating wastewater containing MO.The results showed that Ti O2hollow microspheres were nanometer anatase and were formed by self-assembly of tiny nanocrystals.The diameter of Ti O2hollow microspheres was 0.4~0.5μm,and the specific surface area reached 60m^2/g.After Ti O2hollow microspheres were added into containing 15 mg/L methyl orange aqueous solution,the photocatalytic degradation of MO was initiated by irradiating the reaction mixture with an 8W UV-lamp for 80 min.The degradation rate of methyl orange could reach 95%,indicating that assynthesized Ti O2hollow microspheres processed excellent photocatalytic property for the degradation of MO.