Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (01): 189-194.doi: 10.3866/PKU.WHXB201111152

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Influence of Functional Group Decoration on Gas Adsorption in MOF-5

CHEN Chi, PANG Jun, HAN Shuang, ZHANG Bi-Xia, HUANG Yuan, MIAO Ling, JIANG Jian-Jun   

  1. Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
  • Received:2011-09-09 Revised:2011-10-24 Published:2011-12-29
  • Contact: MIAO Ling
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50771047).

Abstract: This paper presents a comprehensive study about the adsorption ability of five different sites in metal-organic framework (MOF-5), including pure and different groups (―NO2, ―NH2, ―CH3, ― OZn) decorated ones, for CO2 and other greenhouse gases and industrial waste gases. The selective adsorption ability was investigated based on the tight binding approximation method. The results show that sites I and II are the major adsorption sites for pure MOF-5. The highest adsorption energy can be -0.25 eV. Group decoration enhances the adsorption ability of MOF-5 when adsorbing CO2, which is highly related to the activity of decorated groups and the local configurations. Among these groups, ― NO2 enhances the adsorption ability of all sites for CO2 absorption. The ―NO2 decorated MOF-5 shows an obvious selective adsorption ability for different gases in the air environment (O2, N2, H2O, CO2) and for industrial waste gases environment (CO2, CO, NO, NO2, SO2, SO3).

Key words: Tight binding approximation, MOF-5, Decoration of functional group, Greenhouse gas, Adsorption


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