Tehnologia de preparare a nanotuburilor de carbon cu un singur perete
► Metoda de descărcare a arcului
Arc discharge is an important technology for the early realization of the synthesis of single-walled carbon nanotubes. In an inert gas environment, this method involves evaporating the graphite electrode with a high-voltage arc, and the resulting carbon vapor deposits on the surface of the catalyst to form SWCNTs. This method has the advantages of simplicity and rapidity, but the difficulty În separarea nanotuburilor de carbon de înaltă puritate a fost întotdeauna o problemă .
► Metoda de depunere a vaporilor chimici
Chemical vapor deposition (CVD) is currently the dominant method for industrial production of single-walled carbon nanotubes. It uses carbon sources such as methane or ethylene. At high temperatures, with the aid of a catalyst, the carbon sources are decomposed and deposited to synthesize SWCNTs. Compared with arc discharge method, CVD are un randament ridicat și o puritate bună a produsului, dar se confruntă și cu provocările recuperării catalizatorului și a costurilor ridicate .
► Metoda de evaporare laser
The laser evaporation method generates single-walled carbon nanotubes by bombarding a graphite target containing a catalyst with high-energy laser pulses. This method can prepare SWCNTs of extremely high purity, with a purity of 70% to 90%. However, due to the complex equipment and high cost, it limits the possibility of large-scale industrial Aplicație .
Metoda pirolizei în fază solidă la temperatură scăzută
The process of synthesizing carbon nanotubes by low-temperature solid-phase pyrolysis is stable and suitable for laboratory-scale production. This method does not require a catalyst, but it needs high-purity raw materials and is currently difficult to achieve large-scale production.
Câmpul biomedical .