期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 11, 页码 3034-3039出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.09.002
关键词
Porous metal-organic frameworks; Polyoxometalates; Functionalization; Adsorption; Volatile organic compounds
资金
- NSFC [20871027, 20973035]
- Program for New Century Excellent Talents in University [NCET-07-0169]
- Fundamental Research Funds for the Central Universities [09ZDQD0015]
- Program for Changjiang Scholars and Innovative Research Team in University
The functionalization of porous metal-organic frameworks (Cu-3(BTC)(2)) was achieved by incorporating Keggin-type polyoxometalates (POMs), and further optimized via alkali metal ion-exchange. In addition to thermal gravimetric analysis, IR, single-crystal X-ray diffraction, and powder X-ray diffraction, the adsorption properties were characterized by N-2 and volatile organic compounds (VOCs) adsorption measurements, including short-chain alcohols (C < 4), cyclohexane, benzene, and toluene. The adsorption enthalpies estimated by the modified Clausius-Clapeyron equation provided insight into the impact of POMs and alkali metal cations on the adsorption of VOCs. The introduction of POMs not only improved the stability, but also brought the increase of adsorption capacity by strengthening the interaction with gas molecules. Furthermore, the exchanged alkali metal cations acted as active sites to interact with adsorbates and enhanced the adsorption of VOCs. (C) 2011 Elsevier Inc. All rights reserved.
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