Citation: Xudong Zhao, Yuxuan Wang, Xinxin Gao, Xinli Gao, Meihua Wang, Hongliang Huang, Baosheng Liu. Anchoring thiol-rich traps in 1D channel wall of metal-organic framework for efficient removal of mercury ions[J]. Chinese Chemical Letters, ;2025, 36(2): 109901. doi: 10.1016/j.cclet.2024.109901 shu

Anchoring thiol-rich traps in 1D channel wall of metal-organic framework for efficient removal of mercury ions

Xudong Zhao ^a ,
Yuxuan Wang ^a ,
Xinxin Gao ^a ,
Xinli Gao ^{b, *,} ,
Meihua Wang ^b ,
Hongliang Huang ^{d, *,} ,
Baosheng Liu ^c

a.
College of Chemical Engineering and Technology, Taiyuan University of Science and Technology, Taiyuan 030024, China
b.
Instrumental Analysis Center, Taiyuan University of Science and Technology, Taiyuan 030024, China
c.
College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
d.
State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China

gaoxinli@tyust.edu.cn

huanghongliang@tiangong.edu.cn

Received Date: 3 January 2024
Revised Date: 21 March 2024
Accepted Date: 16 April 2024
Available Online: 16 April 2024

Figures(5)

Metal-organic frameworks (MOFs) attract broad interests in mercury (Hg) ion adsorption field, while unreasonable distribution of active groups commonly restricts their utilization efficiency. In this work, we constructed a new MOF (TYUST-6) with dense thiol-rich traps in the 1D pore wall. This accessible channel and rational distribution of thiols allow the smooth diffusion of Hg ions and thereby result in a high Langmuir adsorption capacity of 1347.6 mg/g, almost reaching the theoretical maximum (1444.3 mg/g). Adsorption equilibrium needs 10 and 30 min at the initial concentrations of 10 and 100 mg/L, respectively. Common co-existing ions and solution pH show almost negligible interferences on the adsorption, and adsorbent regeneration can be well achieved. Combining experimental characterizations and theoretical calculations, the thiol groups in the pore wall are proved to be the dominant interaction sites. Thus, this work reports a novel high-capacity adsorbent for Hg²⁺, and proposes a feasible guideline for designing effective adsorbents.
- Metal-organic frameworks,
- Thiol groups,
- Mercury ion,
- Adsorption,
- Waste water treatment
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