Large-scale synthesis of nano-ZIF-90 from zinc chloride application orientation heat storage materials

Abstract

The paper presents the results of the first research on the synthesis of nano-ZIF-90 from zinc chloride. More specifically, the paper also introduces the results of large-scale pure nano-ZIF-90 synthesis with a high specific surface, uniform cubic crystals, and good thermal strength. ZIF-90 is synthesized from zinc chloride-containing medium capillaries, which have both a weak acid center and a strong base center. The post-synthetic ZIF-90 was also evaluated for heat storage based on its ability to adsorb water, methanol, and ethanol. XRD, FTIR, SEM, TEM, N₂ adsorption and desorption methods, TG mass thermal analysis, and NH₃-TPD/CO₂-TPD were used to study the ZIF-90 crystallization process with modifications of precursors, solvents, additives, and reaction conditions. From this, a large-scale synthesis of nano-ZIF-90 from high-efficiency zinc chloride has been derived. DSC measurements are used to evaluate the enthalpy adsorption of water, methanol, and ethanol on ZIF-90.