Ultra-high adsorption behavior of zeolitic imidazole framework-67 nanoparticles for removing brilliant green dye.

Metal–organic frameworks have been a new type of adsorbent in environmental remediation due to their simple preparation processes and stable chemical properties in water. However, they are limited by their low adsorption capacities to some organic pollutants. Herein, ZIF-67 nanoparticles with a high Brunauer, Emmett and Teller (BET) surface area were designed and successfully synthesized by a time-saving, low cost, and environment liquid phase synthesis method at room temperature. The physicochemical properties of ZIF-67 nanoparticles were well studied by various measurements, such as x-ray diffraction, BET analysis, and scanning transmission microscopy. Meanwhile, the ZIF-67 nanoparticles with the stable structure are introduced as the adsorbent for trapping brilliant green in pollutant water, exhibiting the ultra-high adsorption capacity of 1989 mg g−1 due to their high specific surface area (425 m2 g−1) and the interaction between π–π and the benzene ring. Moreover, the ZIF-67 showed acceptable reusability after regeneration with ethanol. Evidently, the ZIF-67 nanoparticles show excellent adsorption performances for organic dyes. This work can give a new application to zeolite imidazole framework materials in water treatment. [ABSTRACT FROM AUTHOR]