The metal-organic framework UiO-66 is a promising water vapor adsorbent in the application of adsorption heat pumps due to its good stability and hydrophilicity. In this paper, we prepared some pure and Cr-doped UiO-66 samples by the traditional solvothermal method and microwave-assisted solvent synthesis method, respectively. And we characterized these samples by XRD、FTIR、BET, etc. The results show that the micropore volume and BET specific surface area of UiO-66 synthesized by the microwave-assisted method is much higher than those synthesized by the conventional solvothermal method. In particular, MW-1.5Cr-UiO-66 synthesized by microwave method has the highest BET specific surface area (1524m2/g) and water uptake (0.59g/g), which is 105.4% and 47.5% higher than UiO-66 synthesized by solvothermal method, respectively. This is more conducive to the application of UiO-66 in the field of adsorption heat pumps.
Keywords Adsorption heat pumps, Porous materials, metal-organic framework (MOF), UiO-66