Metal-organic frameworks (MOFs) constructed from metal atoms connected by organic linkers have received extensive attention for greenhouse gas separation in the past decades. Moreover, their large surface area makes them a promising candidate as adsorbents for gas sorption. This project aims to develop MOFs via different synthesis instructions by utilizing Mg-containing materials, including Commercial MgCO3 and Mesoporous Magnesium Carbonate (Upsalite) as a source of the metal part and four different organic linkers. Water, Ethanol, Methanol, and N, N-dimethylformamide were used as solvents. First, synthesis was performed at room temperature, followed by high temperature using an autoclave and reactor. Then, the successfully synthesized samples were characterized by different characterization methods. These characterization techniques included Powder X-ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), and Infrared Spectroscopy (IR). Porous properties of the MOFs were tested by gas adsorption techniques, including N2 and CO2 as adsorbate gases. As a result, it was found that synthesized MOFs have a high surface area and porosity to adsorb greenhouse gases and separate CO2 from N2. The highest surface area, N2, and CO2 adsorption amounts were 539 m²/g, 0.32 (mmol/g at 293K,1bar), and 3.31 (mmol/g at 293K,1bar), respectively. CO2 adsorption is approximately ten times N2 adsorption in almost all MOF synthesized samples. To achieve the best result regarding the high amounts of surface area, N2, and CO2 sorption, synthesis at room temperature using Commercial MgCO3, H2dhbq linker, and water solvent was the best approach.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-469189 |
| Date | January 2022 |
| Creators | Maghsoodpoor, Ali |
| Publisher | Uppsala universitet, Institutionen för materialvetenskap |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | MATVET Materialteknik ; 22002 |
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