摘要
采用滚压振动磨在干法室温状态下大批量制备了氧化锌纳米材料,分别利用X射线衍射仪(XRD)、透射电镜(TEM)和原子力显微镜(AFM)对样品晶体结构和形貌进行了表征.结果表明,ZnO纳米颗粒平均粒径约为60 nm,材料结晶良好,无杂质.室温下光致发光(PL)谱显示,在390 nm处有近带边紫外发射峰,这属于激子态发光;同时,在510 nm处有较弱的绿光发射峰,而强度最强的是位于648 nm处的红光发射峰,这两种发射属于表面缺陷态发光.UV-Vis吸收光谱表明,产物在紫外区有很强的紫外吸收,吸收峰出现了蓝移现象,这种蓝移验证了材料存在键断裂等表面缺陷态.Raman光谱表明非极性光学声子模位于437.6 cm-1处,纵向光学模(LO)峰位于583.6 cm-1处.
Large scale manufacturing of ZnO nanoparticles at room temperature was reported. The assynthesized particles and their optical performance were characterized by XP, D, TEM, AFM, PL, UV-vis absorption spectra and Raman spectra. The synthesized ZnO nano-particles, the size of which is about 60 nm, have good crystal structure, and are free of impurity. Room temperature PL shows an ultraviolet band emission peaked at around 390 nm corresponding to the near band-edge emission and a green band peaked at around 510 nm. The most intensive emission is the red band peaked at around 648 nm, which can be ascribed to the surface defects of the materials. UV-Vis spectrum analysis reveals that ZnO nanoparticles have the strong absorbing peak and some blue-shift in the UV area. The blueshift manifests the bond breakage introduced by the milling, which may be the origin of the visible light emission. The Raman bands at 437.6 and 583.6 are assigned as the E2 and E1 （LO） modes, respectively.
出处
《上海理工大学学报》
EI
CAS
北大核心
2008年第6期573-577,共5页
Journal of University of Shanghai For Science and Technology
基金
国家自然科学基金资助项目(50575147)
关键词
滚压振动磨
纳米结构
ZNO
光致发光性能
roller vibration milling
nanostructure
ZnO
photoluminescence performance
