Electrospinning Preparation And Performance Of Metal Nitrides One-dimensional Nanostructures

In recent years,metal nitrides have attracted the attention of researchers,and the research on these metal nitrides has become more extensive and deeper.Metal nitride materials can be applied in many fields,for example,lithium ion battery,gas sensor,supercapacitor,fuel cell,solar cell and so on.Therefore,the study of preparation and performance of metal nitrides is a meaningful subject of research.In this dissertation,NiO/Ni₃ N composite hollow nanofibers were prepared via effective combination of electrospinning with reduction and nitridation of NH3 atmosphere.Then NiO/Ni₃ N composite hollow nanofibers were used as sensing material to fabricate sensors for NOx sensing.The results show that NiO/Ni₃ N composite hollow nanofibers exhibit more excellent sensing performances compared with NiO hollow nanofibers and Ni₃ N nanofibers.We also used the combination of electrospinning with reduction and nitridation of NH3 atmosphere to prepare Co₃O₄,CoO,Co₂ N,?-Fe₂O₃,Fe₃O₄ and Fe₂ N hollow nanofibers,Cr₂O₃ and CrN nanofibers,MnO particles,C/MnO/Mn₃N₂ particles and C/Mn₃N₂ fibers.The prepared Co₃O₄,CoO,Co₂ N,?-Fe₂O₃,Fe₃O₄ and Fe₂ N hollow nanofibers were applied as anode materials for lithium ion batteries.The electrochemical test of Co₃O₄,CoO,Co₂ N,?-Fe₂O₃,Fe₃O₄ and Fe₂ N hollow nanofibers electrodes results indicate that metal oxides have higher capacity than metal nitrides at a current density of 100 mA·g-1,but metal nitrides have better rate capability than metal oxides.It is mainly because metal nitrides have higher conductivity than metal oxides.MnO particles,C/MnO/Mn₃N₂ particles and C/Mn₃N₂ fibers were used as anode materials for lithium ion batteries.The electrochemical test of MnO particles,C/MnO/Mn₃N₂ particles and C/Mn₃N₂ fibers electrodes results demonstrate that the cycling performance of C/MnO/Mn₃N₂ particles is the best at a current density of 100 mA·g-1,but rate capability of MnO particles is the best.