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电流值对水下电弧法制备洋葱状富勒烯的影响

Effect of current on synthesis of onion-like fullerenes by arc-discharge in water
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摘要 研究了在不同电流值条件下纯石墨电极水下电弧放电法制备洋葱状富勒烯(OLFs)的过程和工艺。采用场发射扫描电镜,X射线衍射,高分辨透射电镜对产物的微观结构和形貌进行表征。所得产物是直径约为25nm,外形呈球状并具有一定的空心结构OLFs。研究了放电时的电流值对产物的产量和产率以及对产物石墨化程度的影响,结果表明在20A-50A范围内随着电流强度的增大OLFs的产量和产率都有不同程度的提高。 The technical processes of preparing onion-like fullerenes (OLFs) with different current densities by arc-discharge in water were explored. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) were used to characterize the morphologies and microstructures of the OLFs. The results indicated that the OLFs had an hollowness at the centre with diameter about 25 nm. The influence of current density on yield, productivity and degree of graphitization of the OLFs were studied. The yield and productivity of OLFs rose obviously with the increasing of current density in the range of 20 -50A.
出处 《材料热处理学报》 EI CAS CSCD 北大核心 2007年第B08期348-350,共3页 Transactions of Materials and Heat Treatment
基金 "973"计划(2004CB217808) 国家自然科学基金(90306014) 山西省自然科学基金(2006011054) 山西省高校科研项目(20051214).
关键词 洋葱状富勒烯(OLFs) 电弧放电 石墨化 产率 onion like fullerenes (OLFs) arc-discharge graphitization productivity
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参考文献8

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