Synthesis and magnetic properties of highly dispersed tantalum carbide nanoparticles decorated on carbon spheres
| Autor: | Kaustav Bhattacharjee, Suprakas Sinha Ray, Gopes Chandra Das, Satya Prakash Pati, Trisita Nandy Chatterjee, Arjun Maity |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
chemistry.chemical_element Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Carbide chemistry.chemical_compound symbols.namesake law Carbothermic reaction General Materials Science Graphene General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Chemical engineering Transmission electron microscopy symbols 0210 nano-technology Raman spectroscopy Carbon Tantalum carbide |
| Zdroj: | CrystEngComm. 18:1427-1438 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c5ce02350e |
| Popis: | The decoration of carbon spheres (CS) by highly dispersed tantalum carbide nanoparticles (TaC NPs) was achieved, for the first time by a unique carbothermal reduction method at 1350 °C for 30 min under reduced oxygen partial pressure. TaC NPs decorated CS composites were then extensively characterized by powder X-ray diffraction and electron microscopy techniques. The composite spheres were approximately 0.8–1 μm in diameter with an average size of 41 nm for the TaC NPs located at the surface. Transmission electron microscopy and Raman analysis showed the formation of the graphene layer at the outer surface of the TaC NPs. An anomalous ferromagnetic response with a spin-glass like behavior has been observed at low temperature in the dc magnetization study with complete suppression of the superconducting response. For ease of synthesis and high reproducibility, this technique opens a new paradigm in the preparation of carbon sphere supported high melting metal carbide nanoparticles for various technological purposes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|