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Low-Temperature Synthesis of Monolithic Titanium Carbide/Carbon Composite Aerogel
Resorcinol-formaldehyde/titanium dioxide composite (RF/TiO(2)) gel was prepared simultaneously by acid catalysis and then dried to aerogel with supercritical fluid CO(2). The carbon/titanium dioxide aerogel was obtained by carbonization and then converted to nanoporous titanium carbide/carbon compos...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7767110/ https://www.ncbi.nlm.nih.gov/pubmed/33339289 http://dx.doi.org/10.3390/nano10122527 |
Sumario: | Resorcinol-formaldehyde/titanium dioxide composite (RF/TiO(2)) gel was prepared simultaneously by acid catalysis and then dried to aerogel with supercritical fluid CO(2). The carbon/titanium dioxide aerogel was obtained by carbonization and then converted to nanoporous titanium carbide/carbon composite aerogel via 800 °C magnesiothermic catalysis. Meanwhile, the evolution of the samples in different stages was characterized by X-ray diffraction (XRD), an energy-dispersive X-ray (EDX) spectrometer, a scanning electron microscope (SEM), a transmission electron microscope (TEM) and specific surface area analysis (BET). The results showed that the final product was nanoporous TiC/C composite aerogel with a low apparent density of 339.5 mg/cm(3) and a high specific surface area of 459.5 m(2)/g. Comparing to C aerogel, it could also be considered as one type of highly potential material with efficient photothermal conversion. The idea of converting oxide–carbon composite into titanium carbide via the confining template and low-temperature magnesiothermic catalysis may provide new sight to the synthesis of novel nanoscale carbide materials. |
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