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采用纳米金红石型TiO2为Ti源,水热法合成了Ti纳米晶须,将其表面负载磷酸三丁酯(TBP)制备出修饰Ti纳米晶须。用SEM、TEM及傅里叶红外光谱仪对Ti纳米晶须及修饰Ti纳米晶须的形貌和结构进行表征,分别研究了两种材料对铀离子的吸附性能,考察了修饰Ti纳米晶须吸附铀的动力学及等温吸附模型。电镜表征结果表明,水热温度为160℃成功合成出Ti纳米晶须,其粒径范围为80～100 nm。吸附铀研究结果表明,在3 mol/L NO3-介质中修饰Ti纳米晶须表现出较高的吸附性能,修饰Ti纳米晶须对铀的吸附动力学模型符合准二级动力学,吸附等温线符合Langmuir和Freundlich等温吸附模型。将修饰Ti纳米晶须用于自来水中低浓度铀的回收,结果较好。
Ti nano-whiskers were synthesized by hydrothermal method using nano-rutile TiO2 as Ti source, and Ti nano-whiskers modified by TBP were prepared on the surface. The morphologies and structures of Ti nanowhiskers and modified Ti nanowhiskers were characterized by SEM, TEM and Fourier transform infrared (FTIR) spectroscopy. The adsorption properties of uranium ions on the two materials were studied respectively. The effects of Ti nanowhiskers adsorption Uranium kinetics and isothermal adsorption model. Electron microscopy characterization results showed that the Ti nanowhiskers were synthesized successfully at hydrothermal temperature of 160 ℃ and the particle size ranged from 80 nm to 100 nm. Adsorption of uranium results show that the modified Ti nanowhiskers in 3 mol / L NO3- medium showed higher adsorption properties, adsorption kinetics model modified Ti nanowhiskers in line with pseudo-second order kinetics, adsorption isotherms Conforms to Langmuir and Freundlich isotherm models. The modification of Ti nanowhiskers for low concentrations of uranium in tap water recovery, the results are better.