Comprehensive investigation of dynamic CO2 capture performance using Mg/DOBDC as precursor to fabricate a composite of metallic organic framework and graphene oxide

In this paper, Mg/DOBDC MOF (a MOF built of Mg (II) ions linked by 2,5-dioxido-1,4-benzenedicarboxylate (DOBDC) ligands) was first used as the precursor to fabricate a novel Mg/DOBDC MOF and graphene oxide (GO) composite (Mg/DOBDC MOF@GO). A comprehensive investigation of CO2 capture performance of the novel synthesized Mg/DOBDC MOF@GO composite was discussed and summarized. Initially, the influence of preparation method, the solvent of GO and the ratio of GO in the composite was systemically investigated. Following, the structure change of the Mg/DOBDC MOF after introducing of GO was thoroughly studied. Finally, the cyclability, kinetic study and adsorption mechanism were also discussed. The obtained Mg/DOBDC MOF@GO(w-30) with 30 ml GO showed the maximum CO2 uptake of 8.60 mmol g(-1) at 0.1 MPa and 25 degrees C, which is almost twice as much as the parent Mg/DOBDC MOF. This paper not only gives a detailed description of synthesis and utilization of MOF@GO composite for CO2 capture, but also provides a full picture of understanding the adsorption kinetic and adsorption mechanism of MOF and MOF@GO composite, which will give significant guidance to the future work.

Automated summary

The study utilized Mg/DOBDC MOF as a precursor to fabricate a Mg/DOBDC MOF and GO composite, with a comprehensive investigation of its CO2 capture performance. The obtained Mg/DOBDC MOF@GO composite showed significantly improved CO2 uptake compared to the parent MOF. This research not only provides insights into synthesis and utilization of composites for CO2 capture, but also enhances understanding of adsorption kinetics and mechanisms for future guidance.