Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 316, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2022.123633
Keywords
Metal-organic frameworks; MIL-101(Cr); Cu2+doping; Adsorption; Volatile organic compounds
Funding
- Key R & D Program of Shandong Province (Major Technological Innovation Project)
- Shandong Province Natural Science Foundation of China
- [2020CXGC011201]
- [ZR2019MEE112]
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Metal-organic frameworks (MOFs) are effective adsorbents for volatile organic compounds (VOCs) removal. The introduction of copper ions improves the adsorption capacity and thermal stability of the adsorbents.
Volatile organic compounds (VOCs) cause great harm to the ecological environment and human health. Metal -organic frameworks (MOFs) are one of the high-performance adsorbents for the removal of VOCs. A typical MOFs material MIL-101(Cr) was prepared by hydrothermal synthesis, and the properties of the material were optimized by doping copper ions. All prepared adsorbents were characterized by XRD, FTIR, SEM, TG and N2 adsorption-desorption. The results showed that Cu@MIL-101(Cr) with different Cu2+ doping content was suc-cessfully prepared without changing the framework structure of MIL-101(Cr). However, the surface area and pore size of Cu@MIL-101(Cr) were reduced, the crystallinity and thermal stability were influenced by varying degrees. Among the samples, Cu-2@MIL-101(Cr) expressed the best adsorption ability on toluene due to the introduction of unsaturated metal sites by doped copper ions, which could improve the adsorption performance of MIL-101(Cr), and its saturation adsorption capacity could reach 469 mg/g. Although Cu2+ doping reduced the spe-cific surface area of the material, the increased active sites could greatly improve the adsorption performance of the material, meanwhile the desorption efficiency of Cu-2@MIL-101(Cr) could also reach 86% after 5 times cycles.
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