Simple preparation of crystal Co₃(BTC)₂·12H₂O and its catalytic activity in CO oxidation reaction

Abstract

Crystalline metal-organic framework cobalt (II) benzenetricarboxylate Co₃(BTC)₂·12H₂O (MOF-Co) has been prepared using solvothermal method. The reaction of cobalt (II) nitrate and 1,3,5-benzenetricarboxylic (BTC) acid in a mixed solution of N,N-dimethylformamide (DMF)/C₂H₅OH/H₂O (1:1:1, v/v) at low temperature for short reaction times produced this crystalline compound. Compared with traditional hydrothermal method, a mixed solution method for the synthesis of crystalline metal complex was found to be highly efficient. After water molecules were removed from this metal complex, its exposed nodes served as active sites. When this MOF-Co was employed in the oxidation of CO, it showed good catalytic properties causing 100% conversion of CO to CO₂ at low temperature of 160 °C.

Keywords

metal-organic framework / solvothermal synthesis / crystalline compound / cobalt catalyst / CO oxidation reaction

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