期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 40, 页码 13197-13201出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201807891
关键词
bismuth; EXAFS spectroscopy; metal-organic frameworks; selective capture; selenite
资金
- National Natural Science Foundation of China [51473081, 51672143]
- Outstanding Youth of Natural Science in Shandong Province [JQ201713]
- ARC [170103317]
Chemically durable and effective absorbent materials for selenite (SeO32-) remain highly desirable for contamination remediation. Now a bismuth-based metal-organic framework (Bi-MOF, CAU-17) was used as adsorbent to capture SeO32- anions from aqueous solution with ultrahigh adsorption capacity of 255.3 mg g(-1) and fast kinetics. Furthermore, the adsorbent showed excellent selectivity for SeO32- and was able to work steadily in a broad pH range of 4-11. Density functional theory (DFT) calculation, XANES modeling, and EXAFS fitting suggested that SeO32- anions were immobilized by forming Bi-O-Se bonds (T-3 structural model) though splitting the O-Bi-O bond in the crystal structure, leading to a structural transformation of CAU-17 in the solid state.
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