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Influence of Carbonic Nanostructure Formation on EPR Line Parameters during Carbonization of Wheat Bran

机译:麦麸碳化过程中碳纳米结构的形成对EPR谱线参数的影响

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Carbomzed wheat bran samples were studied by electron paramagnetic resonance (EPR) spec-troscopy, elemental analysis and electron microscopy The carbonization was performed in the temperature range from 250 to 800 °C in argon medium. The carbon content increased with temperature At high temperatures a sharp decrease in the concentration of fiee radicals takes place. It is shown that at high temperatures the EPR line width reduces from 0 87 (initial) to 0.11 ml This phenomenon is explained by the fact that at high temperatures there occurs the formation not only of graphitelike structures (classical interpretation) but also of different nanosize structures The electron microscopy data verify the formation of different forms of nanostructures in the carbonized wheat bran samples.
机译:通过电子顺磁共振(EPR)光谱,元素分析和电子显微镜研究了碳化的麦麸样品。碳化是在氩气介质中于250至800°C的温度范围内进行的。碳含量随温度增加而升高。高温下,自由基的浓度急剧下降。结果表明,在高温下,EPR线宽从0 87(初始)减小到0.11 ml。这一现象可以解释为,在高温下,不仅会形成类石墨结构(经典解释),而且还会形成不同的纳米尺寸结构电子显微镜数据验证了碳化麦麸样品中不同形式的纳米结构的形成。

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