Journal
CHEMICAL ENGINEERING JOURNAL
Volume 378, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.122106
Keywords
Cu-Zn; MOFs; Bimetallic; Porous carbon; Adsorption desulfurization
Categories
Funding
- National Natural Science Foundation of China [21606193]
- Natural Science Foundation of Hebei Province [B2019203384]
- Hebei Province Funded Project for Introduced Overseas Chinese Scholars [CL201623]
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In this work, a metal organic framework (MOF)-restricted high-temperature carbonization autoreduction strategy was employed for the preparation of Cu, Zn-embedded porous carbon (marked as CuZn@C) via carbonizing a ZIF-8 pre-grown on CuO nanosheets. Resulting Cu(I) sites reduced from Cu(II) by using the method were homogeneously dispersed and embedded in the carbon matrix derived from the ZIF-8, which effectively formed pi-complexation with thiophenic sulfur compounds, facilitating the improvement of adsorption desulfurization (ADS) performances. Accordingly, the obtained CuZn@C-0.05, provided with good porous structures, high surface area, large pore volume and uniformly distributed bimetallic active sites, exhibited a remarkable adsorption capacity of DBT (60 mg g(-1)). In addition, pseudo-second-order kinetic and Langmuir models presented best fitting results for DBT adsorbing on the adsorbent CuZn@C-0.05. Simultaneously, the adsorbent also revealed excellent reusability with the slight decrement of 8.4 mg g(-1) after the fifth recycle, further indicating its great potential as a high-efficient and stable adsorbent for ADS.
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