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用大分子网络凝胶法合成了氧化锡(SnO2)纳米颗粒。X射线衍射(XRD)结果表明,合成的SnO2纳米颗粒具有四方金红石结构,不含任何杂质相。扫描电镜(SEM)观察发现,制得的SnO2纳米颗粒形貌规整、呈类菱形。荧光光谱结果表明,在326 nm波长的光激发下,其荧光光谱由四个主发射带组成,其峰值分别位于379,417,450,470 nm。用230 nm波长的光激发,得到一个740 nm的荧光发射峰。基于实验结果,探讨了纳米SnO2的形成机理和发光机制。
Tin oxide (SnO2) nanoparticles were synthesized by macromolecule network gel method. X-ray diffraction (XRD) results show that the synthesized SnO2 nanoparticles have tetragonal rutile structure without any impurity phase. Scanning electron microscopy (SEM) observation found that the morphology of SnO2 nanoparticles obtained was diamond-like. The results of fluorescence spectroscopy showed that under the excitation of 326 nm wavelength, the fluorescence spectra of the three main emission bands were at 379, 417, 450 and 470 nm. Excited with 230 nm light, a 740 nm fluorescence emission peak was obtained. Based on the experimental results, the formation mechanism and the luminescent mechanism of SnO2 nanoparticles were discussed.