金刚石和类金刚石的常温常压电化学合成

采用线性扫描伏安(LSV)\, X射线粉末衍射和拉曼光谱等方法对电化学还原法从CCl4\|NaCl\|\BMIM\]BF4体系合成金刚石的可能性进行了研究. LSV研究结果表明, CCl4可在白金研究电极表面直接还原而不需要NaCl作为电子媒介. 采用恒电势电解的方法可在白金研究电极上获得黑色还原产物. 采用X射线粉末衍射和拉曼光谱对研究电极表面形成的黑色产物进行了表征, 在XRD图谱中可观察到金刚石的特征峰, 在拉曼光谱中1 332 cm-1附近可观察到金刚石结构的特征吸收峰, 表明产物中存在金刚石相. 这些结果表明, 采用电化学方法在常温常压下将CCl4转化为金刚石的方法是可行的.

Electrochemical Synthesis of Diamond and Diamond-like Material at Ambient Temperature and Pressure

The possibility of electrochemical synthesis of diamond from CCl_4-NaCl-\BF_(4) system at ambient temperature and pressure was testified by using the linear sweeping voltammetry(LSV),X-ray diffraction(XRD),and Raman spectroscopy. It was found by LSV that CCl_4 could be directly reduced on Pt electrode without NaCl serving as electron medium.A substance with black color formed on Pt electrode during the potentiostatic electrolysis between-1.5 and 2.4 V vs.Ag/AgCl.The characteristic diffraction peaks of diamond with d = 2.03,1.23 and 1.07 could be observed in the XRD pattern of the product with another compound of unknown composition distinguished.In the Raman spectrum,the characteristic Raman shift of diamond at 1 332 cm~-1 could be observed.Both XRD and Raman spectroscopy confirmed the presence of diamond or diamond-like material in the product.This suggested that to synthesize diamond or diamond-like material from CCl_4-\BF_4 system at ambient temperature and pressure is possible.The formation mechanism of diamond or diamond-like material from CCl_(4) electrochemically was discussed.