【摘要】 以钛酸四丁酯为原料，利用水解法构造了Ti-O-Ti的空间结构，通过添加有机硝酸铁和磷酸氢二铵两种原料，向其空腔内引入Fe、P双元素掺杂，得到P-FeN-TiO₂复合材料。使用扫描电镜（SEM）观察了材料的表面形貌，通过吸附等温线、吸附动力学拟合模型分析材料对铊的吸附性能；考察不同溶液pH值、阳离子共存时对铊吸附进程的影响。结果表明：P-Fe-TiO₂复合材料具有多孔结构，吸附符合单分子层吸附，Langmuir拟合最大吸附容量283.1 mg/g，吸附大约2 h达到平衡，强酸性环境会抑制铊的吸附，随着p H值的升高吸附容量逐渐增大，K（Ⅰ）,Na（Ⅰ）离子的存在对吸附干扰较小，Ca（Ⅱ）离子的存在会与Tl（Ⅰ）竞争有效的吸附结合位点，导致吸附效率降低，根据吸附前后材料的XPS表征分析，P-FeN-TiO₂复合材料对Tl（Ⅰ）的吸附机理为Ti-OH、P=O、Fe-OH三种基团与Tl（Ⅰ）发生了络合作用，从而实现铊的去除。更多还原

【Abstract】 The spatial structure of Ti-O-Ti was constructed using hydrolysis method using tetrabutyl titanate as raw material.By adding organic iron nitrate and diammonium hydrogen phosphate as raw materials,Fe and P dual element doping were introduced into its cavity to obtain P-FeN-TiO₂composite material.The surface morphology of the material was observed by scanning electron microscopy（SEM）,and the adsorption performance of the material of thallium was analyzed by adsorption isotherms and adsorption kinetic fitting model.The effects of different solution pH and cation coexistence on the adsorption process of thallium were investigated,and the results showed that the P-Fe-TiO₂composite material had a porous structure and the adsorption was consistent with the adsorption of a single molecular layer.The maximumadsorption capacityfitted by Langmuir is 283.1 mg/g,and the adsorption reaches equilibrium about 2 h.The strong acidic environment would inhibit the adsorption of thallium,and the adsorption capacity would gradually increasewith the increase of pH value.while the presence of K（Ⅰ） and Na（Ⅰ） ions would have little interference with the adsorption,while the presence of Ca（Ⅱ）ions would compete with Tl（Ⅰ）for effective adsorption binding sites,resulting in lower adsorption efficiency.According to the XPS characterization of the materials before and after adsorption,the adsorption mechanism of Tl（Ⅰ）by P-FeN-Tio₂composite was that three groups,Ti-OH,P=O and Fe-OH,were complexed with Tl（Ⅰ）,thus achieving thallium removal.更多还原