g-C3N4／NiO复合材料的制备及其对AP热分解的影响

摘要

通过混合煅烧法制备出g‐C3 N4／NiO复合材料，采用X射线衍射（XRD）、红外光谱（FT‐IR）、场发射扫描电子显微镜（FESEM ）、X射线能谱（EDS）对其结构和形貌进行表征，利用差热分析（DTA）和热失重（TG）研究其对高氯酸铵（AP）热分解的影响。结果表明：纳米NiO均匀分散于g‐C3 N4的表面，g‐C3 N4／NiO使AP的高温和低温分解峰合并，高温分解温度降低62．5℃，表现出良好的催化作用。g‐C3 N4／NiO的复合催化效果优于单独使用g‐C3 N4或NiO ，说明g‐C3 N4和N iO具有协同催化作用。%g‐C3 N4/NiO composites were prepared by a simple mixing‐calcination method .The struc‐ture and morphology of g‐C3N4/NiO were characterized by X‐ray Diffraction(XRD) ,Fourier Trans‐form Infrared Spectrometer (FT‐IR) ,Field Emission Scanning Electron Microscopy (FESEM ) and En‐ergy Dispersive X‐ray spectroscopy(EDS) .The catalytic effect of g‐C3N4/NiO on thermal decomposi‐tion of ammonium perchlorate (AP) was investigated by Differential Thermal Analysis (DTA ) and Thermo Gravimetric Analysis (TG) .The results show that nanometer NiO is uniformly dispersed on the surface of g‐C3 N4 ,g‐C3 N4/NiO composites make the two decomposition peaks of AP combine and the high‐temperature decomposition peak value of AP decrease by 62 .5℃ ,which exhibits good cata‐lytic performance .The catalytic activity of g‐C3 N4/NiO is much higher than that of single‐phase g‐C3 N4 and NiO ,clearly demonstrating a synergistic effect between g‐C3 N4 and NiO .