▎ 摘　　要

Compared to the octahedral metal-organic framework CuBTC (also called HKUST-1), an interesting hexagonal prism shaped CuBTC/carboxyl-functionalized graphene composite was synthesized through a precursor-resolvothermal method. Based on structural characterization results of the composite, the mechanism of crystal morphology-control was proposed that carboxyl-functionalized graphene plays a dual role of structure-directing nucleation sites and framework linkers in the process of CuBTC crystal growth. The precursor-resolvothermal method provides an effective way to transform the morphology of metal-organic frameworks, and the results also demonstrate the possibility of using functionalized graphene to synthesize a wide range of structural motifs in metal-organic frameworks with adjustable metrics. On the basis of maintaining thermal stability, the composite exhibited about a 6% increase in CO2 capacity (from 6.39 mmol.g(-1) of CuBTC to 6.77 mmol.g(-1) at 273 K and 1 atm). (C) 2018 Elsevier Ltd. All rights reserved.