TiO_(2)/SrTiO 3微球的制备及其光催化性能

Synthesis and Photocatalytic Performance of TiO_(2)/SrTiO_(3)Microspheres

以锐钛矿型TiO_(2)微球为前驱体,通过水热法原位合成TiO_(2)/SrTiO_(3)异质复合材料。采用扫描电镜和X射线衍射等对样品的形貌和结构进行表征。以亚甲基蓝为目标降解物,研究反应条件对其光催化性能的影响。结果表明,TiO_(2)/SrTiO_(3)复合材料为微球状,立方结构的SrTiO_(3)以纳米立方体的形貌附着在微球表面,氢氧化锶浓度0.025 mol/L,反应时间2 h,氢氧化钠加入量为0.5 g,光照时间为140 min时,亚甲基蓝降解率达到86.9%。

TiO_(2)/SrTiO_(3)composites were synthesized by hydrothermal method using anatase TiO_(2)microspheres as precursors.The morphology and structure of the samples were characterized by SEM and XRD.The effect of reaction conditions on the photocatalytic activity of methylene blue was studied.The results show that the TiO_(2)/SrTiO_(3)composite is microsphere,and cubic SrTiO_(3)is attached to the surface of microsphere as nano cube.When the concentration of strontium hydroxide is 0.025 mol/L,the reaction time is 2 h,the amount of sodium hydroxide is 0.5 g,and the irradiation time is 140 min,the degradation rate is 86.9%.