Low temperature synthesis of high quality carbon nanospheres through the chemical reactions between calcium carbide and oxalic acid

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• 作者：Yonggui Xie ; Qizhong Huang ; Baiyun Huang ; Xiangmin Xie
• 关键词：Chemical synthesis ; Nanostructures ; Electron microscopy ; Raman spectroscopy
• 刊名：Materials Chemistry and Physics
• 出版年：2010
• 出版时间：1 November 2010
• 年：2010
• 卷：124
• 期：1
• 页码：482-487
• 全文大小：718 K

文摘

Carbon nanospheres (CNSs) were synthesized through the chemical reactions of calcium carbide and oxalic acid without using catalysts. The chemical reactions were carried out in a sealed stainless steel pressure vessel with various molar ratios at temperatures of 65–250 °C. The synthesized CNSs have been characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) attached to the SEM, transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. The total yield of carbonaceous materials relative to the starting material is about 4 % (w/w). SEM and TEM results reveal that the percentage of CNSs is high (>95 % ). The CNSs that have been synthesized are roe-like spheres of relatively uniform size with diameters of 60–120 nm. The attached EDS result shows that the carbon content of CNSs reaches up to 98 % .