【摘要】 利用CaC2-CHCl3体系反应合成纳米碳球,利用X射线衍射仪(XRD)和扫描电镜(SEM)对产物的物相、形貌和显微结构进行分析。对该体系进行吉布斯自由能和反应热效应计算,结合实验结果,研究采用无机化学反应法制备微纳米碳球的中间态成碳机理。结果表明:从理论上证实CaC2-CHCl3体系热解产物可能为石墨、金刚石和C3原子气;标准状态(298 K)下CaC2-CHCl3体系的吉布斯自由能、反应热效应和绝热温度分别为?1 847.5 kJ/mol、?1 945.5 kJ/mol和6 184 K;C3原子气是低温反应条件下无机碳源制备纳米碳球的中间态碳源前驱体。用CaC2-CHCl3体系可制备最大直径200~300 nm左右的碳球。更多还原

【Abstract】 Carbon nanospheres were prepared via CaC2-CHCl3 system,and the phase,morphology and microstructure of the pyrolytic products were detected by X-ray diffraction(XRD) and scanning electron microscope(SEM).Gibbs free energies and reaction thermodynamics of the system were theoretically calculated.Combining with experimental analysis,the mechanism for intermediate state carbon formation of carbon nanospheres by inorganic chemical reaction technology was studied.The results show that the pyrolytic products of CaC2-CHCl3 system are probably graphite,diamond and C3 atom gas.The Gibbs free energies,the reactive thermal effect and the adiabatic temperature of CaC2-CHCl3 system are-1 847.5 kJ/mol,-1 945.5 kJ/mol and 6 184 K,respectively.C3 atom gas is the intermediate carbon precursor of carbon nanospheres under the low temperature reaction and inorganic carbon source.Carbon nanospheres with maximum diameter of 200~300nm can be synthesized via CaC2-CHCl3 system.更多还原