Graphene quantum dot incorporation in the zeolitic imidazolate framework: Synthesis and improving the adsorption ability in liquid phase

The combination of zero-dimensional graphene quantum dots (GQDs) with three-dimensional metal-organic frameworks (ZIF-۸) improves the resulting nanocomposite properties. The characteristics of synthesized nanomaterials were confirmed by FTIR, XRD, TGA, BET, Raman, SEM, and HRTEM. The removal of soluble dye was investigated to compare the adsorption properties of nanocomposite with pristine GQD and ZIF-۸. The effects of GQD loading dose in composite (۲-۲۰%), adsorbents dosage (۰.۷-۲.۵ mg), initial dye concentration (۲۰-۵۰ mg/L), and the pH of MG solution (۴-۷) as the influential parameters on pollutant removal were investigated. This process was in good agreement with the pseudo-second-order kinetics and the Langmuir isotherm model.

کلیدواژه ها:

Zeolitic imidazolate framework ، Graphene Quantum dot ، Hybrid nanocomposites ، Adsorption process ، Cationic dye