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采用Schlenk line技术,通过一种简单的硒源热注射的方法合成了Cu_2SnSe_3(CTSe)纳米晶,同时采用胶体法得到了单分散性极好的、粒径为4nm左右的Ag纳米颗粒(Ag NPs),之后通过简单的滴加法向CTSe纳米晶基质中掺入了特定比例的Ag NPs,得到CTSe-Ag纳米复合物。通过X射线粉末衍射、透射电镜、高分辨透射电镜、红外光谱和热重分析等表征了样品的组成、结构和形貌。同时对合成样品的热电性质进行了研究,相关的测试结果表明,以CTSe为基体掺杂AgNPs的样品中,CTSe-1(mol)%Ag具有最佳的热电优值(ZT=0.23,655K),相较纯相CTSe(ZT=0.18,655K)提高了27%。
The Cu 2 SnSe 3 (CTSe) nanocrystals were synthesized by a simple selenium source thermal injection method using Schlenk line technique. Meanwhile, the Ag nanoparticles (Ag NPs) with excellent monodispersity and size of about 4 nm were obtained by colloidal method. ), Followed by a simple dropwise addition to the CTSe nanocrystalline matrix with a specific ratio of Ag NPs to give CTSe-Ag nanocomposites. The composition, structure and morphology of the samples were characterized by X-ray powder diffraction, transmission electron microscopy, high resolution transmission electron microscopy, infrared spectroscopy and thermogravimetric analysis. At the same time, the thermoelectric properties of the synthesized samples were studied. The related test results show that CTSe-1 (mol)% Ag has the best thermoelectric figure of merit (ZT = 0.23, 655K) , Compared with pure CTSe (ZT = 0.18, 655K) increased by 27%.