A Water Resistant Solid Superbase Derived from Calcium: Synthesis, Characterization and Catalytic Performance

Author(s): Lin-Bing Sun , Yan-Hua Li , Yu Yin , Xiao-Lei Wu , Xiao-Qin Liu .

Journal Name: Current Organic Chemistry

Volume 17 , Issue 20 , 2013

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Abstract:

In comparison with the development of new materials with strong basicity, less attention is paid to the improvement of water resistance of solid bases. In the present study, Ca(NO3)2 and γ-Al2O3 was employed as base precursor and support, respectively, producing the materials denoted as CaNA. The results show that calcium ions can insert into the vacancies on the surface of γ-Al2O3, thus generating a strong guest-host interaction. The decomposition temperature of Ca(NO3)2 on γ-Al2O3 (e.g. 460 °C for 20CaNA) is therefore obviously lower than unsupported Ca(NO3)2 (600 °C). The materials after activation possess both superbasicity with high strength of 27.0 and excellent water resistance. This can be attributed to the strong guest-host interaction and low solubility of guest. Moreover, the CaNA materials are catalytically active in 2-propanol dehydrogenation as well as 1-hexene isomerization. On the basis of the present study, it is possible to fabricate a variety of water resistant functional materials by judicious choice of guest and host, which provides valuable candidates for catalysis and adsorption involving water.

Keywords: Alumina, Calcium nitrate, Guest-host interaction, Solid base, Water resistance.

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Article Details

VOLUME: 17
ISSUE: 20
Year: 2013
Page: [2249 - 2255]
Pages: 7
DOI: 10.2174/13852728113179990044
Price: $58

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