铜改性MIL-101吸附溶液中碘离子研究

目的提升MIL-101对溶液中放射性碘离子的吸附性能。方法开展铜掺杂改性MIL-101研究。利用SEM,XRD和比表面与孔径分析仪等表征方法对改性前后的材料进行物理性能分析,并考察不同Cu掺杂量、吸附时间和初始碘离子浓度对吸附效果的影响。结果铜改性后吸附率明显增加,掺杂20%的铜时,材料的比表面积最大,吸附效果最佳;吸附速率随时间增大而降低,而吸附率随初始浓度减小而增大。结论铜改性后的MIL-101对溶液中碘离子有更好的吸附效果,其吸附速率和吸附量都有明显的优势。

Iodide Ions in MIL-101 Adsorbent Solution Modified with Copper

Objective To improve the adsorption performance of MIL-101 on radioactive iodine ions in solution. Methods MIL-101 modified with copper doping was researched. Physical properties of materials before and after modification were analyzed with SEM, XRD, specific surface, pore size analyzer, etc. Moreover, effects of adsorption on the content of copper, adsorption time, initial concentration of iodide ions were studied. Results The adsorption rate of MIL-101 increased obviously after it is modified with copper. Especially when the content of copper is 20%, it had the best adsorption performance because maximum specific surface was achieved. The adsorption rate decreased with the increase of adsorption time, and increased with the decrease of initial concentration. Conclusion MIL-101 has better adsorption property and is dominant in both adsorption rate and adsorption capacity after it is modified with copper.