Novel thymine-functionalized MIL-101 prepared by post-synthesis and enhanced removal of Hg2+ from water

作者：Luo, Xubiao^*; Shen, Tingting; Ding, Lin; Zhong, Weiping; Luo, Jianfeng; Luo, Shenglian^*

来源：Journal of Hazardous Materials, 2016, 306: 313-322.

DOI：10.1016/j.jhazmat.2015.12.034

• Post-synthesis
• Thymine-functionalized MIL-101
• Mercury
• Adsorption
• Application

A novel thymine-functionalized MIL-101 (MIL-101-Thymine) material was synthesized using a post synthesis method to remove mercury at a high efficiency. MIL-101-Thymine was successfully prepared in this work and was confirmed by several characterization methods, such as C-13 nuclear magnetic resonance, X-ray diffraction, and infrared spectroscopy. The Hg2+ adsorption agreed well with the Langmuir model, and the maximum adsorption apacity was 51.27 mgt. The adsorption rate fit with the pseudo second -order kinetic model. Furthermore, MIL-101-Thymine exhibited excellent selectivity towards Hg2+ over other cations, and the maximum value of the selective coefficient reached 947.34; this result is very likely due to the highly selective interactions of T-Hg2+-T in MIL-101-Thymine. The result of X-ray photoelectron spectroscopy also showed that Hg2+ was coordinated with the N of thymine in MIL-101-Thymine. Moreover, the results of the thermogravimetric analysis and adsorption experiments showed that the Hg atom was two-coordinated with the thymine group. MIL-101-Thymine was used to remove trace Hg2+ in real water samples, and satisfactory recoveries were obtained.

• 出版日期2016-4-5
• 单位南昌航空大学