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X-Ray photoelectron spectroscopy reference data for identification of the C_3N_4 phase in carbon-nitrogen films

机译:用于鉴定碳氮薄膜中C_3N_4相的X射线光电子能谱参考数据

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摘要

The #beta#-C_3N_4 phase should have a tetrahedral (sp~3-bonded) structure resulting in C1s and N1s XPS peaks with only one feature at a position defined by the electronegativity of four C-N bonds. In this work we determined the binding energy of the C1s and N1s XPS peaks in melamine (C_3N_6H_6). In this compound the carbon atoms have four bonds with nitrogen atoms (double and two single);;the nitrogen atoms have two chemical states: C-N=C and C-N=H_2. Since the total number of chemical bonds in this compound is the same as in the hypothetical #beta#-C_3N_4 compound, this compound is more suitable as a C1s XPS reference for the #beta#-C_3N_4 phase. The binding energy of the C1s and N1s XPS peaks in melamine was determined to be equal to 287.9 and 399.1 eV, respectively. The binding energies were determined relative to the C1s XPS peak for carbon contamination (adventitious carbon).
机译:#beta#-C_3N_4相应具有四面体(sp〜3键)结构,导致C1和N1 XPS峰仅在四个C-N键的电负性所定义的位置具有一个特征。在这项工作中,我们确定了三聚氰胺(C_3N_6H_6)中C1和N1s XPS峰的结合能。在该化合物中,碳原子与氮原子具有四个键(双键和两个单键);氮原子具有两个化学状态:C-N = C和C-N = H_2。由于该化合物中的化学键总数与假设的#beta#-C_3N_4化合物相同,因此该化合物更适合作为#beta#-C_3N_4相的C1s XPS参考。确定三聚氰胺中C1和N1 XPS峰的结合能分别等于287.9和399.1 eV。相对于碳污染(不定碳)的C1s XPS峰确定结合能。

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