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用改进的聚丙烯酰胺凝胶法制备颗粒近似呈球形且粒度均匀的ZnAl2O4纳米颗粒,并制备了3种锌铝摩尔比的ZnAlO样品。XRD结果表明,当锌铝摩尔比为1∶1.8和1∶2时,在900℃煅烧干凝胶制备的样品均为纯相的ZnAl2O4粉体。SEM结果表明,锌铝摩尔比为1∶2制备的样品其颗粒尺寸随着煅烧温度的提高而增大,且在900℃出现严重的团聚。荧光光谱分析结果表明,激发波长为352nm时出现一个469nm的蓝光发射峰。基于实验结果,研究了其络合机理和发光机理。
ZnAl2O4nanoparticles with approximate spherical shape and uniform particle size were prepared by a modified polyacrylamide gel method, and three kinds of ZnAlO samples with zinc-aluminum molar ratio were prepared. The results of XRD showed that when the ratio of zinc to aluminum was 1: 1.8 and 1: 2, the samples calcined at 900 ℃ were all pure ZnAl2O4 powders. The SEM results showed that the particle size of samples prepared with 1: 2 ratio of zinc to aluminum increased with the increase of calcination temperature, and serious agglomeration occurred at 900 ℃. Fluorescence spectrum analysis showed that a 469nm blue emission peak appeared at the excitation wavelength of 352nm. Based on the experimental results, the complexation mechanism and luminescence mechanism were studied.