Abstract
A ball milling approach has been performed for isostructural ZnZIF-8 and CoZIF-8 in a 1:1 molar ratio to produce the amorphous (a) solid solution state (aZn0.5Co0.5ZIF-8). It further transformed to a crystalline (c) solid solution state (cZn0.5Co0.5ZIF-8) by exposing 95% relative humidity (RH) at 25 °C for 72 h. Unique heterometal solid solution structure and high catalytic active sites of aZn0.5Co0.5ZIF-8 showed excellent photocatalytic performance for the degradation of methylene blue dye under visible light source. The catalytic efficiency of aZn0.5Co0.5ZIF-8 (97.9%) is much higher than the pristine (p) as well as the amorphous state (a) of ZnZIF-8/CoZIF-8 and cZn0.5Co0.5ZIF-8.
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