10.1021/acs.inorgchem.9b01242.s001
Liang Zhang
Liang
Zhang
Jing Wang
Jing
Wang
Ting Du
Ting
Du
Wentao Zhang
Wentao
Zhang
Wenxin Zhu
Wenxin
Zhu
Chengyuan Yang
Chengyuan
Yang
Tianli Yue
Tianli
Yue
Jing Sun
Jing
Sun
Tao Li
Tao
Li
Jianlong Wang
Jianlong
Wang
NH<sub>2</sub>‑MIL-53(Al) Metal–Organic
Framework as the Smart Platform for Simultaneous High-Performance
Detection and Removal of Hg<sup>2+</sup>
American Chemical Society
2019
MIL
Simultaneous High-Performance Detection
removal
LMCT
detection
Hg
ligand-to-metal charge transfer
ability
ligand-based luminescence MOFs materials
NH 2
oxidation state aluminum
2019-09-11 19:08:31
Journal contribution
https://acs.figshare.com/articles/journal_contribution/NH_sub_2_sub_MIL-53_Al_Metal_Organic_Framework_as_the_Smart_Platform_for_Simultaneous_High-Performance_Detection_and_Removal_of_Hg_sup_2_sup_/9807899
The worsening pollution
due to mercury species makes it inevitable to explore prospective
versatile materials, which not only can detect mercury ions (Hg<sup>2+</sup>) with high sensitivity but also possesses efficient capture
and removal ability. In this study, a series of classic organic ligand-based
luminescence MOFs materials with high oxidation state central metals
(Al<sup>3+</sup>, Zr<sup>4+</sup>, Cr<sup>3+</sup>, Fe<sup>3+</sup>, and Ti<sup>4+</sup>) were synthesized and were screened to achieve
simultaneously Hg<sup>2+</sup> detection and removal through the strong
coordination of amino groups or nitrogen centers with Hg<sup>2+</sup> and the intrinsic fluorescence intensity of MOFs regulated by the
ligand-to-metal charge transfer (LMCT) effect. Among these checked
materials, NH<sub>2</sub>-MIL-53(Al) exhibited the excellent ability
for Hg<sup>2+</sup> detection with wide response interval (1–17.3
μM), low detection limit (0.15 μM), good selectivity,
wide pH adaptation (4.0–10.0), and strong anti-interference
ability. Meanwhile, the resultant NH<sub>2</sub>-MIL-53(Al) possessed
an efficient removal capability toward Hg<sup>2+</sup>, accompanied
by a fast uptake kinetics (within 60 min) and large loading capacity
(153.85 mg g<sup>–1</sup>). Furthermore, NH<sub>2</sub>-MIL-53(Al)
also displayed satisfactory stability before and after Hg<sup>2+</sup> treatment because of the formation of strong coordination bonds
between high oxidation state aluminum (Al<sup>3+</sup>) and organic
carboxylate ligands. Notably, the prepared NH<sub>2</sub>-MIL-53(Al)
had no significant loss of adsorption performance even after being
reused four times. All of these superior properties render the smart
NH<sub>2</sub>-MIL-53(Al) nanohexahedron a great potential for simultaneous
Hg<sup>2+</sup> detection and removal from water.