以钛酸丁酯为钛源采用水热法制备钛纳米管,用透射电镜和X射线衍射分析(XRD)表征材料的形貌和组成以及N2吸附/脱附比表面积的测试,研究了钛纳米管对铀离子的吸附.结果表明,钛纳米管的外径为8 nm,管长度达2μm,由Na2Ti3O7与H3Ti3O7共存组成;吸附铀容量随着温度的升高、震荡时间的增加平缓升高,最大吸附pH值为5,饱和吸附容量达62.9 mg/g,吸附等温线符合Langmuir和Freundlich等温吸附模型.热力学研究表明,该吸附是吸热自发过程,回收率随着铀量的增加而逐步减小,吸附铀的钛纳米管比未吸附铀的比表面积小.
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