银纳米/氨基硫脲复合物的合成、表征及光学性质研究  

Synthesis,characterization and optical properties of silver nanoparticles/thiosemicarbazone composites

作　　者：王聪 朱鑫玉 李胜利[1] WANG Cong;ZHU Xinyu;LI Shengli(College of Chemistry and Chemical Engineering,Anhui Province Key Laboratory of Functional Inorganic Materials,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学化学化工学院功能无机材料实验室,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2018年第4期65-74,共10页Journal of Anhui University(Natural Science Edition)

基　　金：安徽省自然科学基金资助项目(1308085MB24);安徽省教委科研基金资助项目(KJ2012A025)

摘　　要：采用微波加热反应,以AgNO_3、氨基硫脲(TSC)为原料,在PVP保护下采用一步合成法制备银纳米/氨基硫脲复合物(AgNPs-TSC),并通过紫外可见光谱(UV-Vis)、X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、透射电镜(TEM)、拉曼光谱和热失重(TGA)等分析方法对其进行分析和表征.结果表明:微波反应时间不影响银纳米颗粒的形态;纳米复合物颗粒平均粒径在30nm左右,形状为球形或类球形;TSC分子是通过配位键覆在银纳米颗粒表面上.同时通过荧光光谱研究复合前后的荧光变化,并通过Z-扫描研究了复合后非线性光学性质的变化,表明复合后双光子吸收系数吸收截面以及三阶非线性光极化率均有明显增强,是一种较好的非线性光学材料.Under the protection of PVP, silver nanoparticles/TSC composites （Ag NPs-TSC） were synthesized by microwave radiation with silver nitrate and TSC. The composites were analyzed and charaterized by ultraviolet-visible spectra （UV-Vis）, X-ray diffraction （XRD）, Fourier transform infrared spectrum （FT-IR）, transmission electron microscope （TEM）, Raman spectrum and thermo-gravimetric analysis （TGA）. The results showed that the morphology of the silver nanoparticles was not affected by microwave radiation time. The morphology of silver nanoparticles was spherical and symmetrical with an average diameter of 30 nm. TSC was through the coordination bond on the surface of silver nanoparticles. On the other hand, non-linear optics property was researched. The alteration of fluoresence for composites was researched by fluorescence spectrum and non-linear optics property was researched by Z-scan. The results indicated that the two-photon absorption coefficient of absorption cross section and the third order nonlinear optical susceptibility for composites had obviously enhanced. It is one of the ideal non-linear optical materials.

关 键 词：银纳米 氨基硫脲 微波 非线性光学 

分 类 号：TB333[一般工业技术—材料科学与工程] O437[机械工程—光学工程]