Preparation of high purity graphite by an alkaline roasting–leaching method

✍ Scribed by Peng Ge; Hua-jun Wang; Jing Zhao; Lin Xie; Qiang Zhang

• Book ID: 104009042
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 80 KB
• Volume: 48
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2010.01.039

✦ Synopsis

A one-step process for the synthesis of onion-like carbon nanoparticles is described. The process is based on a thermolysis of a NaN 3 -C 6 Cl 6 mixture. The effect of buffer gas (Ar or air) on the yield, morphology, and structure of the carbon products was investigated by electron microscopy, X-ray diffraction, and Raman spectroscopy. The products contained carbon-onions, amorphous carbon nanoparticles, and NaCl. The byproducts were completely removed using a simple purification process. The formation of onion-like nanoparticles is likely caused by a shock wave, a rapid increase of pressure, during thermolysis, which induced the coalescence of phenyl radicals.