Effect of SF6 addition in the laser synthesis of fullerene and soot from C6H6/O2 or C6H6/N2O sensitized mixtures

✍ Scribed by R. Alexandrescu; X. Armand; M. Cauchetier; N. Herlin; S. Petcu; I. Voicu

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 87 KB
• Volume: 36
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/s0008-6223(97)00222-4

✦ Synopsis

The effects of SF 6 relative concentration on fullerene and soot formation in the CO 2 laser synthesis from benzene/oxygen and benzene/nitrous oxide sensitized mixtures are reported. Infrared (IR) measurements of exhaust gases and of solid products allowed for identification of fluorinated compounds which were indicative for the partial SF 6 decomposition. The production of C 60 and C 70 was determined by HPLC. It is found that an optimum temperature range exists for fullerene formation. The influence of SF 6 dissociation is studied. The formation of fullerene as a function of two different oxidant agents (O 2 or N 2 O) has also been studied. Preliminary results show a higher production of fullerenes in C 6 H 6 /N 2 O as compared to similar C 6 H 6 /O 2 mixtures. From the experimental results, it seems that the synthesis of fullerene by laser pyrolysis is comparable to flame experiments.