Discipline: Chemistry and Chemical Sciences
Subcategory: Chemistry (not Biochemistry)
Room: Exhibit Hall A
Talia Janelle Ferguson - Clark Atlanta University
Co-Author(s): Saki Golafale, Clark Atlanta University, Atlanta, Georgia
The increase in the amount of CO2 and other greenhouse gasses in the atmosphere from the combustion of fossil fuels is of significant environmental concern. A metal-organic framework (MOF) is a class of solid state materials that have shown great potential as adsorbent to reduce or capture CO2 from the environment. MOFs are 3-dimensional crystalline structures made from a metal ion and an organic ligand. MOFs typically have a high surface area, variable pore size and can be chemically tuned to meet specific applications, such as CO2 adsorption. We report herein, the research on the synthesis, characterization and CO2 adsorption properties of a new MOF based on manganese metal ion and two organic ligands, 2,2?-bipyridine and 2,2?-dinitro-4,4?-stilbenedicarboxylic acid. The MOF was synthesized by combining manganese (II) nitrate tetrahydrate with two organic ligands, 2,2?-bipyridine and 2,2?-dinitro-4,4?-stilbenedicarboxylic acid at 200?C for 48 hours. Non-ambient X-ray powder diffraction and thermogravimetric analyses of the final product, shows a very crystalline structure, that was a very stable structure up to 200?C. Fourier transformed infrared spectroscopy (FTIR) analysis indicate that the 2,2?-dinitro-4,4?-stilbenedicarboxylic acid ligand was deprotonated and fully coordinated to the metal ions,), and For CO2 adsorption studies, the MOF was degassed at various temperatures (25?C, 50?C, 100?C, 120?C and 180?C) under vacuum , each was followed by and CO2 adsorption at 256 K. The CO2 adsorption capacity was highest at the degassing temperature of 180?C. Further analyses (using a degassing temperature of 180 ?C showed that at temperatures of 256 K, 273 K and 298 K, the CO2 adsorption capacities were 1.52 mmol/g, 1.55 mmol/g and 0.77 mmol/g, respectively. The experimental isotherms were fitted using a modified Langmuir-Freundlich isotherm model the MOF is therefore of potential interest based on its intriguing thermal stability and its capacity to adsorb CO2.
Funder Acknowledgement(s): Funding for this research was provided by the National Science Foundation (NSF) award No. 1305041 (GA-AL LSAMP) and Department of Energy grant No.FE00222952
Faculty Advisor: Conrad Ingram, firstname.lastname@example.org
Role: In this research, I completed the synthesis of the MOF, as well as the characterization of the synthesized MOF. This included using TGA, FTIR and XRD. After which I was able to formulate a poster with the assistance of my graduate research mentor, Mr. Saki Golafale.