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

[Display omitted] •A novel thymine-functionalized MIL-101 (MIL-101-Thymine) was first synthesized by post-synthesis method.•The resulting MIL-101-Thymine exhibited high Hg2+ adsorption.•MIL-101-Thymine exhibited excellent selectivity towards Hg2+ over other metal ions.•MIL-101-Thymine was used to re...

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Bibliographic Details
Published in:Journal of hazardous materials 2016-04, Vol.306, p.313-322
Main Authors: Luo, Xubiao, Shen, Tingting, Ding, Lin, Zhong, Weiping, Luo, Jianfeng, Luo, Shenglian
Format: Article
Language:English
Subjects:
Adsorption
Application
Cations
Diffraction
Infrared spectroscopy
Mercury
Mercury (metal)
Photoelectron spectroscopy
Post-synthesis
Thymine
Thymine-functionalized MIL-101
X-rays
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Summary:[Display omitted] •A novel thymine-functionalized MIL-101 (MIL-101-Thymine) was first synthesized by post-synthesis method.•The resulting MIL-101-Thymine exhibited high Hg2+ adsorption.•MIL-101-Thymine exhibited excellent selectivity towards Hg2+ over other metal ions.•MIL-101-Thymine was used to remove trace Hg2+ with satisfactory recoveries in real water samples. 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 13C nuclear magnetic resonance, X-ray diffraction, and infrared spectroscopy. The Hg2+ adsorption agreed well with the Langmuir model, and the maximum adsorption capacity was 51.27mg/g. 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.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2015.12.034