In this paper, we have demonstrated a two-step method to synthesize Sb2Te3 nanorods by using Te nanorods as the self-sacrificed templates. Impurity-free poly-crystalline Sb2Te3 nanorods have been synthesized on a large scale. Strings of Sb2Te3 nanoplatelets have been also synthesized by adjusting the reaction condition for Te nanorod precursor，which may be attributed to the nucleation and epitaxial growth of the Sb2Te3 nanoplatelets on the surface of the templates by the reaction of unconsumed K2TeO3 with Sb3+ ions in the solution. The thermoelectric transport properties of the pressed Sb2Te3 nanorods sample were measured. Enhanced seebeck coefficient and reduced thermal conductivity were observed. The high resistivity of the sample may be ascribed to unoptimized interconnections.
National Natural Science Foundation of China （51501159）
Undergraduate Scientific and Technological Innovation Foundation（20172303003）
Fundamental Research Funds for the Central Universities（XDJK2015C003）
Faculty of Materials and Energy, Southwest University, Chongqing 400715,Department of Physics and Texas Center for Superconductivity，University of Houston, Houston TX 77204,Faculty of Materials and Energy, Southwest University, Chongqing 400715
A simple, surfactant-free, and high-efficient solvothermal approach has been developed to synthesize AgPbmSbTem+2 multicomponent thermoelectric sub-microwires. The AgPbmSbTem+2 nanostructures were prepared using Sb2(NO3)3, Pb(NO3)2, AgNO3 and Na2TeO3 as the reactants, ethylenediamine and ethylene diamine tetraacetic acid as the reducing and complexing agents. A diffusion-limited reaction mechanism was proposed to explain the formation of the nanostructures. The Seebeck coefficient of the bulk pellet pressed by the obtained AgPb18SbTe20 sub-microwires exhibits 22% enhancement over that of the corresponding bulk at room temperature. The synthetic route can be applied to gain other multicomponent telluride nanostructures.
This work was supported by NSF （11302100)）
The State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016. China