A21 ナノカーボンの水中ソノケミカル合成に及ぼす溶存ガスの効果

概要

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Carbon nano-materials were synthesized by ultrasonic irradiation at 200kHz in distilled water under the atmospheres of acetylene with and without the addition of various rare gases. The produced materials with time were different depending on the gas species. HPLC and UV-Visible spectrum analyses revealed that many kinds of water soluble materials were temporally synthesized and decomposed depending on the gases. The quantities of the intermediates were also different depending on the gas content. In all the cases, insoluble soot was obtained after sonication time in the order of several hours, although the time needed for easy separation from water changed in the broader range depending on the gases. The color of the insoluble soot was yellowed brown for He, but almost black for Xe. TEM images of these products revealed that particles in the order of 100nm size were coagulated, parts of which was carbon graphite clarified by TEM electron diffraction pattern. HPLC peak and UV-Visible spectra of the extracted materials in toluene from the produced soot were different from the spectrum of C_<60> and C_<70>.
日本ソノケミストリー学会の論文
2006-10-27