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通过酰氯化反应合成了氧化石墨烯接枝聚苯胺(GO/PANI),再以原位制备法合成了GO/PANI/CdS纳米复合材料。通过红外光谱、X射线衍射、扫描电镜和透射电镜等方法确定了复合物的组成与结构,采用热重方法研究了材料的热稳定性。GO/PANI/CdS中CdS粒径约为4nm,热稳定性良好。采用紫外-可见光谱、荧光和Z-扫描等方法研究了材料的光学性能。结果表明:GO/PANI/CdS的禁带宽度约为2.81eV,荧光强度随着CdS含量的增加而逐渐增强。GO/PANI/CdS在532nm激光辐照下表现出更大的非线性消光系数和三阶非线性极化率虚部值。
The graphene oxide grafted polyaniline (GO / PANI) was synthesized by acid chlorination. GO / PANI / CdS nanocomposites were synthesized by in situ preparation. The composition and structure of the composites were confirmed by infrared spectroscopy, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The thermogravimetric method was used to study the thermal stability of the composites. The particle size of CdS in GO / PANI / CdS is about 4nm and its thermal stability is good. The optical properties of the materials were studied by UV-Vis, fluorescence and Z-scan methods. The results show that the bandgap of GO / PANI / CdS is about 2.81eV, and the fluorescence intensity increases with the increase of CdS content. GO / PANI / CdS showed larger nonlinear extinction coefficient and third-order nonlinear polarizability imaginary part under 532nm laser irradiation.