Abstract
Capture of trace benzene is an important and challenging task. Metal–organic framework materials are promising sorbents for a variety of gases, but their limited capacity towards benzene at low concentration remains unresolved. Here we report the adsorption of trace benzene by decorating a structural defect in MIL-125-defect with single-atom metal centres to afford MIL-125-X (X = Mn, Fe, Co, Ni, Cu, Zn; MIL-125, Ti8O8(OH)4(BDC)6 where H2BDC is 1,4-benzenedicarboxylic acid). At 298 K, MIL-125-Zn exhibits a benzene uptake of 7.63 mmol g−1 at 1.2 mbar and 5.33 mmol g−1 at 0.12 mbar, and breakthrough experiments confirm the removal of trace benzene (from 5 to <0.5 ppm) from air (up to 111,000 min g−1 of metal–organic framework), even after exposure to moisture. The binding of benzene to the defect and open Zn(II) sites at low pressure has been visualized by diffraction, scattering and spectroscopy. This work highlights the importance of fine-tuning pore chemistry for designing adsorbents for the removal of air pollutants.
Original language | English |
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Pages (from-to) | 1531-1538 |
Number of pages | 8 |
Journal | Nature Materials |
Volume | 23 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2024 |
Funding
We thank the Engineering and Physical Sciences Research Council (EPSRC; EP/I011870, EP/V056409), the University of Manchester, National Science Foundation of China and Peking University for funding. This project has received funding from the European Research Council (ERC) under the European Union\u2019s Horizon 2020 research and innovation programme (grant agreement no. 742401, NANOCHEM). We are grateful to the STFC/ISIS Facility for access to beamlines WISH and TOSCA. We acknowledge the Diamond Light Source for access to beamlines I11 and B22. A portion of this research used resources at the Spallation Neutron Source, a US Department of Energy (DOE) Office of Science User Facility operated by the Oak Ridge National Laboratory (ORNL), as well as the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility located at Lawrence Berkeley National Laboratory, operated under contract no. DE-AC02-05CH11231 using NERSC award ERCAP0024340. Additional computing resources were made available through the VirtuES and the ICE-MAN projects, funded by the Laboratory Directed Research and Development programme and Compute and Data Environment for Science (CADES) at ORNL. Y.H., M.H., W.H. and Y.Y. thank the China Scholarship Council (CSC) for funding.
Funders | Funder number |
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Compute and Data Environment for Science | |
Science and Technology Facilities Council | |
Oak Ridge National Laboratory | |
ISIS | |
U.S. Department of Energy | |
China Scholarship Council | |
Laboratory Directed Research and Development | |
Peking University | |
Office of Science | |
European Research Council | |
University of Manchester | |
National Natural Science Foundation of China | |
Lawrence Berkeley National Laboratory | DE-AC02-05CH11231, ERCAP0024340 |
Lawrence Berkeley National Laboratory | |
Engineering and Physical Sciences Research Council | EP/V056409, EP/I011870 |
Engineering and Physical Sciences Research Council | |
Horizon 2020 Framework Programme | 742401 |
Horizon 2020 Framework Programme |