Study on the synthesis and properties of porous cadmium zeolitic imidazolate framework for environmental treatment

Abstract

In this study, cadmium imidazolate frameworks were synthesized by a solvothermal method from cadmium acetate and 2-methylimidazole in an ethanol/methanol mixture. The Cd(Im)2 processed at 150 oC after 8 hours with the mixture of solvents has high crystallinity. The appearance of the absorption band at 407.73 cm-1 shows a link formation of Cd (II) and N within HIm’s molecule. Cadmium imidazolate only formats zeolite crystal, the network fibers were potent, and the pores were alike. The dimension of pores is approximately 200 nm. The XRD diagram shows that the Cd(Im)2 has high crystallinity. The Cd(Im)2 phase is obvious from reflections at 7o, 10o, 12o, 14o, 15,6o and 17o. The surface area of Cd(Im)2 was 662.894 m2/g or 858.389 m²/g with BET or Langmuir calculations, respectively. The maximum adsorption capacity of Cd-ZIF-8 for the RhB is 64.52 mg.g-1, and the adsorption data were fitted well with a pseudo-second-order model.