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富勒烯是除石墨和金刚石外碳的第三种同素异构体,其代表性分子是C_(60)和C_(70)。大量研究成果表明,富勒烯的特殊球形空心分子结构赋予了它许多奇异的物理化学性质,在超导、非线性光学、催化剂等诸多领域显示出十分诱人的应用前景。目前,国内外主要以高纯石墨电极为原料制备富勒烯,由于煤的价格低廉且来源广泛,以煤炭为原料制备富勒烯的研究备受国外学者的关注。本文以冶金焦为原料用电弧法制备富勒烯,研究了实验操作条件及冶金焦性质与富勒烯收率间的关系。粗富勒烯以活性炭为固定相,甲苯为流动相的柱色谱分离提纯,考察了活性炭的孔隙结构及柱色谱的长度对C_(60)纯度和收率的影响。
Fullerene is the third allotrope of graphite and diamond epi-carbon, and its representative molecules are C 60 and C 70. A large number of research results show that fullerenes special spherical hollow molecular structure gives it many bizarre physicochemical properties, in the superconducting, nonlinear optics, catalysts and many other fields show a very attractive prospect. Currently, fullerenes are mainly prepared from high-purity graphite electrodes at home and abroad. Due to their cheap price and wide range of sources, the research on the preparation of fullerenes from coal has drawn much attention from foreign scholars. In this paper, metallurgical coke as raw material arc method for the preparation of fullerenes, the experimental operating conditions and metallurgical coke properties and the relationship between the yield of fullerenes. Crude fullerene was purified by column chromatography using activated carbon as stationary phase and toluene as mobile phase. The effects of pore structure and column length on the purity and yield of C_ (60) were investigated.