Abstract
Zeolitic imidazolate framework ZIF-67 with a pore-structural network has many potential applications in photocatalysis fields due to their intrinsic properties such as high porosity and large surface area. ZIF-67 is prepared under a one-step hydrothermal reaction from cobalt salt in methanol. The morphological and photocatalytic characteristics of ZIF-67 are performed by XRD, SEM, UV–Vis, PL spectroscopy, and BET. The as-synthesized nanoparticles have a nearly monodisperse structure with a large size of ~600 nm. In addition, these ZIF-67 micropores show an excellent efficiency for the methyl orange (MO) photodegradation under visible-light irradiation. In particular, more than 88% of MO is degraded within 1 h when using 0.5 g L−1 of ZIF-67. Besides, the photocatalytic and kinetic performances of ZIF-67 are investigated by optimizing pH value, initial MO concentration in solution, and initial dose of used catalyst. ZIF-67 nanocrystals are demonstrated to be a remarkable material with high photostability and easy reusability.
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