title: Cu-BTC/aminated graphite oxide composites as high-efficiency CO2 capture media.
abstract: CO2 adsorption isotherms on Cu-BTC/aminated graphite oxide composites were measured in the pressure range up to 1.5 MPa at three different temperatures close to ambient. Adsorption capacity, isosteric heat of adsorption, and regenerability were investigated. They are considered as significant factors determining the practical application of materials for CO2 capture. The results indicate a significant improvement in the performance of the composites as CO2 adsorbents in comparison with the parent Cu-BTC MOF. Among all samples analyzed, the composite of Cu-BTC and modified graphite oxide with the highest N content (MOF/GO-U3) is the best performing sample. On its surface 13.41 mmol/g CO2 was adsorbed at room temperature and 1.5 MPa. A high selectivity for CO2 adsorption over that of CH4 was found. The selectivities for CO2 adsorption over N2 are governed by the properties of the MOF phase. A relatively low heat of CO2 adsorption and the high degree of surface homogeneity cause that the composites can be fully regenerated and used in multicycle adsorption with the minimum energy demand.
authors: Dipartimento di Fisica, Università della Calabria and Unità di Ricerca di Cosenza CNISM , Via Ponte P. Bucci, Cubo 31C, 87036 Arcavacata di Rende (CS), Italy.
authors: Alfonso
authors: A
authors: Policicchio
authors: Yunxia
authors: Y
authors: Zhao
authors: Qin
authors: Q
authors: Zhong
authors: Raffaele G
authors: RG
authors: Agostino
authors: Teresa J
authors: TJ
authors: Bandosz