纳米TiO2的离子-水混合热法合成及其光催化性能

The Synthesis of Nano-TiO2 from Mixture of C2OHMIM+Cl-—water and Its Photocatalytic Activity

摘要: 以离子液体C2OHMIM+Cl-为介质,采用离子热法合成了球形纳米TiO2光催化剂,借助X射线衍射、扫描电子显微镜、拉曼光谱仪和紫外-可见光谱仪对产物进行了表征.以合成的样品为光催化剂,罗丹明B为降解物,研究离子液体浓度、反应时间和反应温度等对TiO2光催化活性的影响.研究结果表明,由此法得到的TiO2均为金红石相,形貌是由纳米晶小颗粒堆积起来的球形颗粒.当离子液体质量分数为66.6%,反应温度150℃,反应时间24 h时,合成样品的光催化活性最强,此时对罗丹明B的降解率最高,并且高于P25

Abstract: The nanocrystalline TiO2 was prepared in mixture solvent of ionic liquid C2OHMIM+Cl-and water by hydrothermal method.The samples were characterized by X-ray diffractometer,scanning electron microscopy,Raman spectrometer and UV-Visible spectrometer.The influences of various hydrothermal conditions such as the amount of ionic liquid,reaction temperature and reaction time,on the catalytic activity of TiO2 were investigated.The results show that as-prepared TiO2 is rutile,and its morphology is sph...