氮化锌粉末的结构和化学键状态

Structural and Chemical Bond State of Zn_3N_2 Powder

将Zn粉末置于流量为500ml/min的NH3气流中,在600℃氮化120min,制备出高质量的Zn3N2粉末。X射线衍射(XRD)表明Zn3N2粉末具有立方结构,其晶格常数为0.9788nm。扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察发现Zn3N2粉末晶粒形状具有多样性。X射线光电子谱(XPS)表明Zn3N2的化学键状态与ZnO及金属Zn明显不同,表明N-Zn键的形成。用计算机模拟了Zn3N2晶体的立体结构,用高分辨电子显微镜(HRTEM)观察了Zn3N2粉末的内部结构,观察结果与Partin等提出的Zn3N2结构模型相符合。

Zinc nitride （Zn3N2） powder have been synthesized by nitriding pure zinc powders in the flow of NH3 gas of 500 ml/min at a nitridation temperature of 600℃ for 120 min. X-ray powder diffraction （XRD） indicate that the synthesized Zn3N2 is of a single-phase cubic structure with lattice constants being a=0.9788 nm. The surface morphologies of Zn3N2 powder examined by scanning electron microscopy （SEM） and transmission electron microscopy （TEM） have many different styles. The XPS N1s peak 395.9 eV for Zn3N2 indicates a large chemical shill of 2.9 eV from the N, peak for free amine 398.8 eV. being indicative of the formation of N-Zn bonds. The High resolution transmission electron microscopy （HRTEM） lattice image of a selected nanowire is given, and it is coincident with computer simulation of Patrin＇s model for Zn3N2.