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Performance evaluation of phosphonium based deep eutectic solvents coated cerium oxide nanoparticles for CO2 capture
Tausif Ahmad1, Jibran Iqbal2, Mohamad Azmi Bustam3
1Institute of Chemical & Environmental Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan, 64200, Pakistan.
Environmental Research
|February 4, 2023
Summary
Deep eutectic solvents (DESs) functionalized cerium oxide nanoparticles (CeNPs) show promise for capturing carbon dioxide (CO2). DES6-functionalized CeNPs achieved a 27% increase in CO2 adsorption, offering a new strategy for reducing greenhouse gas emissions.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Anthropogenic carbon dioxide (CO2) emissions are a primary driver of global warming and climate change.
- Effective CO2 capture technologies are crucial for mitigating environmental impacts.
- Nanomaterials offer unique properties for adsorption-based separation processes.
Purpose of the Study:
- To investigate the CO2 adsorption potential of deep eutectic solvents (DESs) surface-functionalized cerium oxide nanoparticles (CeNPs).
- To explore the role of different DES formulations in enhancing CO2 capture efficiency.
- To provide insights into the mechanisms governing CO2 adsorption on functionalized nanomaterials.
Main Methods:
- Synthesis of phosphonium-based DESs using tetra butyl phosphoniumbromide (HBA) and various carboxylic acids (HBDs).
- Surface functionalization of cerium oxide nanoparticles (CeNPs) with the prepared DESs.
- Characterization of DESs and functionalized CeNPs using FTIR and visual observations.
- Evaluation of CO2 adsorption performance of DES-functionalized CeNPs at low pressure.
Main Results:
- DES6-functionalized CeNPs exhibited a 27% higher CO2 adsorption capacity compared to other formulations.
- DES3-coated CeNPs showed the lowest adsorption performance.
- Enhanced adsorption in DES6-CeNPs is attributed to improved surface affinity and facilitated mass transport of CO2.
- Carboxylic groups in DES likely created an electric field, attracting polarizable CO2 molecules.
Conclusions:
- Deep eutectic solvent surface functionalization significantly enhances the CO2 adsorption capabilities of cerium oxide nanoparticles.
- The specific chemical nature of the DES, particularly the presence of carboxylic groups, plays a critical role in adsorption efficiency.
- This study presents a promising approach for developing advanced materials for CO2 capture, contributing to climate change mitigation efforts.
