Furan and Pyran Functional Groups Driven the Surface of Nitrogen-Doped Nanofiber Sponges
"Highly surface oxidized, nitrogen‐doped, and nitrogen functionalized carbon nanotube sponge (N‐CFS) were produced at 1020 °C using two sprayers approach in an aerosol‐assisted chemical vapor deposition (AACVD) experiment. The structure of N‐CFS consisted of entangled and corrugated carbon nano...
| Autores: | , , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versión aceptada para publicación |
| Data de publicação: | 2020 |
| País: | México |
| Recursos: | Instituto Potosino de Investigación Científica y Tecnológica |
| Repositório: | Repositorio Institucional del IPICYT |
| OAI Identifier: | oai:ipicyt.repositorioinstitucional.mx:1010/2374 |
| Acesso em linha: | http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/2374 |
| Access Level: | Acceso aberto |
| Palavra-chave: | info:eu-repo/classification/Autor/Carbon nanotube sponges info:eu-repo/classification/Autor/Raman-spectroscopy info:eu-repo/classification/Autor/Graphene-oxide info:eu-repo/classification/Autor/Decomposition info:eu-repo/classification/Autor/Performance info:eu-repo/classification/Autor/Electrodes info:eu-repo/classification/Autor/Growth info:eu-repo/classification/Autor/Xps info:eu-repo/classification/Autor/Reduction info:eu-repo/classification/Autor/Mechanism info:eu-repo/classification/cti/2 info:eu-repo/classification/cti/23 |
| Resumo: | "Highly surface oxidized, nitrogen‐doped, and nitrogen functionalized carbon nanotube sponge (N‐CFS) were produced at 1020 °C using two sprayers approach in an aerosol‐assisted chemical vapor deposition (AACVD) experiment. The structure of N‐CFS consisted of entangled and corrugated carbon nanofibers of ∼200 nm diameter, also showing junctions and knots. TEM characterizations revealed that the carbon nanofiber exhibits stacked graphitic layers in a transversal way with positive curvature. Superficial chemical analysis by XPS showed that the N‐CFSs contain an atomic concentration of oxygen and nitrogen of 9.2% and 2.9%, respectively. The high‐resolution XPS scans deconvolution‐analysis revealed high percentages for C−O bonds, pyrrolic nitrogen doping, NH3 functionalization, and Si−C interactions. The cyclic voltammetry measurements did not display a redox process despite the high oxygen concentration at the surface. Hydrophobic functional groups containing C−O bonds do not participate in a redox process (furan, pyran, epoxy, methoxy, ethoxy, among others) could mostly determine the electroactivity of N‐CFS. Based on density functional theory calculations, we determine that the furans transfer a high amount of electron and promote a positive curvature in thin carbon nanotubes. Graphitic materials with furans, pyrans, and epoxy functional groups could be used as an anode in lithium‐ion batteries." |
|---|