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Fabrication of mesoporous CeO2–MgO adsorbent with diverse active sites via eggshell membrane-templating for CO2 capture.
- Source :
- Applied Physics A: Materials Science & Processing; Jan2022, Vol. 128 Issue 1, p1-13, 13p, 2 Color Photographs, 1 Diagram, 2 Charts, 5 Graphs
- Publication Year :
- 2022
-
Abstract
- There is an increasing demand for the development of highly efficient CO<subscript>2</subscript> capture techniques to address global warming and climate change. Although adsorption is an effective approach towards capturing CO<subscript>2</subscript>, conventional adsorbents possess limited adsorption capacities and exhibit low adsorption rates. In this study, we successfully fabricated mesoporous composite CeO<subscript>2</subscript>–MgO adsorbents (CM-BT) with diverse active sites via the eggshell membrane (ESM)-templating method, for CO<subscript>2</subscript> capture applications. The utilisation of ESM-templating produced a CM-BT with better structural and textural properties. The CM-BT possessed a higher surface area (42 m<superscript>2</superscript>/g) and pore volume (0.185 cm<superscript>3</superscript>/g) than those of the composite prepared using a thermal decomposition method (CM-TD). In addition, the CM-BT possessed more diverse base sites of various strong base site strengths (O<superscript>2−</superscript>) and abundant hydroxyl groups, and metal–oxygen pair base sites than CM-TD. The diverse strengths of the strong base sites were correlated with the coordination of O<superscript>2−</superscript> and the electronegativity of metal ions. With these excellent physicochemical properties, the CM-BT composite exhibited a high CO<subscript>2</subscript> uptake capacity of 5.7 mmol/g under CO<subscript>2</subscript> flow and ambient conditions, which is 2.5 times higher than that of CM-TD. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09478396
- Volume :
- 128
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Applied Physics A: Materials Science & Processing
- Publication Type :
- Academic Journal
- Accession number :
- 154707490
- Full Text :
- https://doi.org/10.1007/s00339-021-05182-5