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Nitrogen-phosphorus doped graphitic nano onion-like structures: experimental and theoretical studies
Armando D Martínez-Iniesta1, Aarón Morelos-Gómez2, Emilio Muñoz-Sandoval1
1División de Materiales Avanzados, IPICYT Camino a la Presa San José 2055, Lomas 4a sección San Luis Potosí 78216 Mexico flo@ipicyt.edu.mx.
RSC Advances
|April 15, 2022
Summary
Researchers developed novel phosphorus- and nitrogen-doped graphitic nano onion-like structures (NP-GNOs). These carbon nanomaterials exhibit excellent thermal stability and potential applications in energy storage devices like supercapacitors.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Onion-like graphitic structures, featuring pentagons, heptagons, and octagons, are crucial for applications like Li metal batteries and oxygen reduction reactions.
- These carbon nanomaterials are nested fullerene structures with unique electronic and structural properties.
Purpose of the Study:
- To synthesize and characterize novel phosphorus- and nitrogen-doped graphitic nano onion-like structures (NP-GNOs).
- To investigate the potential of these NP-GNOs for advanced energy storage applications.
Main Methods:
- Aerosol-assisted chemical vapor deposition (AACVD) at 1020 °C using ferrocene, trioctylphosphine oxide, benzylamine, and tetrahydrofuran.
- Characterization using thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS).
- Density functional theory (DFT) calculations for phosphorus-nitrogen doping and functionalized C240 fullerenes.
Main Results:
- NP-GNOs with diameters of 110-780 nm containing Fe-based nanoparticles were successfully produced.
- High thermal stability was confirmed by TGA, with an oxidation temperature of 724 °C.
- FTIR and XPS revealed phosphorus-nitrogen codoping and various functional groups, including P-O and P=O bonds, indicating potential for supercapacitor applications.
Conclusions:
- The synthesized NP-GNOs possess desirable structural and chemical properties for energy storage.
- The phosphorus-nitrogen doping and specific functional groups are key to enhancing performance in applications like supercapacitors.
