Production of fullerenes and nanopipes in a carbon plasma jet at kilohertz frequ

2019-10-10 10:11:55

carbon plasma jet fullerene fullerenes

责任者: Churilov, G.N.;Korets, A.Ya.;Titarenko, Ya.N. 单位: L.V. Kirenski Inst. of Phys., Acad. of Sci., Krasnoyarsk, Russia 来源出处: Technical Physics(Tech. Phys. (USA)),1996/01/,41(1):102-3 摘要: The arc discharge device proposed by Kretschmer and Huffman (1990) generates 10 g/h of fullerene-containing soot and is the most widely used source for producing fullerenes at this time. However, it is unlikely that this synthesis technique can satisfy all the increasing demand in industry and science for fullerenes. Thus, searches are under way for new, more efficient methods of obtaining fullerene intermediate products. We have used a carbon plasma jet in the kilohertz frequency range for synthesizing C60 and C70 fullerenes and nanopipes. The yield of condensed soot from this coaxial plasma source at 300 A was 20 g/h, or twice the yield of the Kretschmer method for making fullerene-containing soot. A spectral-optical method for determining the fractional concentrations of C60 and C7O in the carbon condensate (the fullerene-containing intermediate product) without preliminary chromatographic purification has been tested 关键词: chemical reactions;chemical technology;fullerenes;plasma jets;spectrochemical analysis;fullerenes;nanopipes;carbon plasma jet;kilohertz frequencies;intermediate products;visible absorption spectra;condensed soot yield;coaxial plasma source;fractional concentrations;C60;C7O;carbon condensate;chromatographic purification;spectral-optical method;jet self-blowout;qualitative analysis;monofractions;extracted product concentration;300 A;400 to 800 nm;C70