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采用溶胶凝胶法和气氛还原热处理工艺在二氧化硅凝胶玻璃基质中原位生长硒化锌纳米晶,首次获得了均匀、透明、亮黄色的ZnSe-SiO2凝胶玻璃纳米复合材料.利用X射线衍射(XRD)、UV-VIS吸收光谱和Raman光谱对复合材料中的ZnSe纳米粒子进行了光谱表征.观测到均匀分散在凝胶玻璃中的硒化锌纳米晶XRD衍射峰的宽化、带间吸收边的蓝移及Raman散射光谱的移动和非对称的宽化.利用实验数据从理论上对凝胶玻璃中ZnSe纳米晶平均粒径的计算,结果表明X射线衍射、光吸收边蓝移以及Raman光谱的估算结果基本一致,平均直径为4.6 nm左右,并对它们之间的偏差进行了分析.
ZnSe-SiO2 gel glass nanocomposites were obtained for the first time by the sol-gel method and the atmosphere reduction heat treatment in situ growth of zinc selenide nanocrystals in silica gel glass matrix. X-ray diffraction XRD, UV-VIS and Raman spectra were used to characterize the ZnSe nanoparticles in the composites.The widened XRD diffraction peaks of ZnSe nanocrystals uniformly dispersed in the gelled glass were observed, Blue shift of absorption edge, Raman scattering spectrum and asymmetric broadening.Using experimental data to calculate the average particle size of ZnSe nanocrystals in gel glass theoretically, the results show that X-ray diffraction, blue shift of light absorption edge and The results of Raman spectra are basically the same, the average diameter is about 4.6 nm, and the deviation between them is analyzed.