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通过高温裂解法制备了非晶SiO_x:C颗粒,该颗粒在空气中经不同温度进行煅烧.利用傅里叶红外光谱、扫描电子显微镜和荧光光谱仪对SiO_x:C颗粒样品的结构、形貌和光学性质进行了研究.结果显示:随着煅烧温度的升高,样品的荧光光谱的峰位发生蓝移;当煅烧温度为500℃时,样品的荧光峰蓝移到417 nm处,且强度最强;而且该颗粒拥有红、绿、蓝三色的荧光效应;但经高温(600℃和800℃)煅烧后,样品的荧光强度大大降低.我们认为这种现象与样品被充分氧化后其中的氧缺陷减少有关.
The amorphous SiOx: C particles were prepared by pyrolysis method and calcined at different temperatures in air.The structure, morphology and optical properties of SiOx: C particles were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and fluorescence spectroscopy The results show that the fluorescence peak shifts blue with the increase of calcination temperature. When the calcination temperature is 500 ℃, the fluorescence peak shifts blue to 417 nm and the intensity is the highest ; And the particles have the fluorescence effects of red, green and blue; however, the fluorescence intensity of the sample is greatly reduced after being calcined at high temperature (600 ° C. and 800 ° C.) We think this phenomenon is related to the oxygen in the sample after it is fully oxidized Reduced defects related.