摘要
以钛酸丁酯为钛源,氢氟酸为形貌控制剂,采用水热法合成了具有高表面能(001)晶面的锐钛矿相TiO_2纳米材料。利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)及紫外-可见漫反射光谱分析(UV-vis)对样品的形貌、结构和谱学性能进行表征,并以甲基橙溶液为目标污染物,研究其光催化性能和最佳制备条件。结果表明,以氢氟酸为形貌控制剂时,可制备锐钛矿相(001)晶面纳米TiO_2纳米材料,能拓宽TiO_2体系光响应范围,并具有较高的光催化性能;当反应温度为180°C、时间为24 h、F/Ti摩尔比为1.5时,样品对甲基橙溶液光催化降解率最高,在紫外光照射条件下1 h内降解率可达99.08%,其可见光降解率为66.79%。
（001） facets exposed anatase TiO_2 nanomaterials with high surface energy were prepared by hydrothermal method using hydrofluoric acid as morphology-controlling agent and Ti（OBu）4as titanium source.The morphology,structure and spectroscopy performance of prepared TiO_2 were characterized by X-ray powder diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM） and UV-Vis diffuse reflectance spectroscopy（UV-vis）.In addition,the photocatalytic property and the optimal preparation condition of the synthesized TiO_2 were investigated using methyl orange as a target pollutant.The results show that（001） facets exposed anatase nanomaterials with broadend light response range and high photocatalytic performance can be prepared when the hydrofluoric acid is used as a morphology-controlling agent.When the hydrothermal temperature,hydrothermal time and F/Ti molar ratio Is setted at 180 ° C,24 h and 1.5,respectively,the sample exhibits the highest photocatalytic degradation rate to methyl orange.Upon 1 h light irradiation,the UV and visible light photodegradation rate of methyl orange reached 99.08% and 66.79%,respectively.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第5期1216-1222,共7页
Journal of Synthetic Crystals
基金
国家自然科学基金(21367020)
