CO2 adsorption properties of Ni-BDC MOF and its 1–8 wt% g-C3N4/Ni-BDC MOF

Abstract

The substantial challenge that the world is facing nowadays, is the increase in greenhouse gasses which causes global warming. Therefore, there must be a technique to overcome its global emission rate. Accordingly, many absorbents and adsorption techniques are used to capture the CO₂ gas. Here, this study reports a novel class of adsorbents Metal Organic Framework (MOF) and its g-C₃N₄ based composites are used to adsorb CO₂. The synthesis of Ni-BDC MOF and its 1–8 wt% g-C₃N₄/Ni-BDC MOF composites were successfully prepared via the solvothermal method. These samples are characterized by using different techniques like XRD, EDX, SEM, FTIR to investigate the structural and morphological properties. The MOFs and their composites were studied for CO₂ adsorption and desorption at a temperature of 25 °C and 0–15 bar pressure. Among all the composites, 5 wt% g-C₃N₄/Ni-BDC MOF shows the highest adsorption capacity of 0.50 mmol/g. The rising adsorption trend of all prepared materials shows that these samples do not reach their saturation point and can still adsorb more CO₂ even at pressure higher than 15 bar.