Few-step synthesis, thermal purification and structural characterization of porous boron nitride nanoplatelets
| Autor: | Kostoglou, N., Lukovic, J., Babic, B., Matovic, B., Photiou, D., Constantinides, G., Polychronopoulou, K., Ryzhkov, V., Grossmann, B., Mitterer, C., Rebholz, Claus |
|---|---|
| Přispěvatelé: | Φωτίου, Δημήτρης, Κωνσταντινίδης, Γιώργος |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Hexagonal structure
02 engineering and technology 01 natural sciences Hexagonal structures chemistry.chemical_compound Gravimetric analysis Desorption Air purification General Materials Science Composite material Hexagonal boron nitride (h-BN) Specific surface area (SSA) Purification Nanoplatelets Thermogravimetric analysis Boric acid 021001 nanoscience & nanotechnology Structural characterization Gas adsorption Mechanics of Materials Boron nitride Porous powders Pore size Thermal purification 0210 nano-technology Natural Sciences Scanning electron microscopy Materials science X ray diffraction Nitrogen Nano-platelets 010402 general chemistry Heat treatment Nitrides Differential scanning calorimetry Adsorption Thermal gravimetric analyses (TGA) Specific surface area lcsh:TA401-492 Thermal stability Porosity Mechanical Engineering Oxidation resistance Characterization studies 0104 chemical sciences Chemical engineering chemistry Chemical Sciences lcsh:Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Materials & Design, Vol 110, Iss, Pp 540-548 (2016) Materials and Design |
| Popis: | Hexagonal boron nitride (h-BN) nanoplatelets with similar to 99 wt.% purity, 900 to 2000 nm particle width, 30 to 90 nm particle thickness, similar to 213 m(2)/g specific surface area (SSA), similar to 66% micropore SSA and similar to 0.85 nm average pore size were synthesized in a powder form using H3BO3 and CO(NH2)(2) as precursors followed by consecutive thermal treatments under inert and oxidized atmospheres. Thermal gravimetric analysis (TGA) combined with differential scanning calorimetry (DSC), under synthetic air-flow and up to similar to 1300 degrees C, were employed to evaluate both purity and oxidation resistance of the product directly upon its synthesis. The h-BN powder was collected at the stage of its highest purity which, based on TGA-DSC data, corresponded to an additional heat treatment up to similar to 700 degrees C. The active oxidation seems to occur in the temperature range between similar to 860 and similar to 1000 degrees C, followed by formation of B2O3 in the final residue. Subsequently, the purified h-BN powder was extensively characterized for its structure, morphology and porosity using X-ray diffraction, scanning electron microscopy and nitrogen gas adsorption/desorption measurements at 77 respectively. As briefly discussed, purity and SSA seem to have a crucial role in the thermal stability and oxidation resistance of BN materials in general. (C) 2016 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|