Journal of Hebei University(Natural Science Edition) >

2023 , Vol. 43 >Issue 1: 58 - 66

DOI: https://doi.org/10.3969/j.issn.1000-1565.2023.01.009

Preparation and thermoelectric properties of the LuxBi<sub>2-xTe3 alloys with nanoflower morphology

  • WU Fang ,
  • WANG Wei
Expand
  • 1.College of Artificial Intelligence, Henan Finance University, Zhengzhou 450046, China; 2.College of Information Engineering, Zhengzhou University of Technology, Zhengzhou 450044, China

Received date: 2022-05-23

  Online published: 2023-02-22

Fold

Abstract

The Bi2Te3 based materials have good thermoelectric properties around room temperatures. The themoelectric properties of the Bi2Te3 based alloys can be improved by nanotechnology and element doping. In this paper the LuxBi2-xTe3 nanopowders with nanoflowers morphology were synthesize by hydrothermal method, and the phase structure and micro-topography of the nanopowders were investigated by X-ray diffractometer(XRD)and a field-emission scanning electron microscopy(FESEM). The effects of the Lu doping and the ethylene diamine tetraacetic acid(EDTA)amounts on the morphology of the nanopowders were investigated. The results showed that the Lu doping is not beneficial to form nanoflowers morphology, and it is vital to select proper amounts of EDTA for forming nanoflowers morphology of the nanopowders. Subsequently, the LuxBi2-xTe3 bulk were synthesized by hot- DOI:10.3969/j.issn.1000-1565.2023.01.009具有花状形貌LuxBi2-xTe3合金的制备及性能吴芳1,王伟2 (1.河南财政金融学院 人工智能学院,河南 郑州 450046;2.郑州工程技术学院 信息工程学院,河南 郑州 450044)摘 要:Bi2Te3基材料在室温附近具有良好的热电性能,通过掺杂和纳米技术可以提高Bi2Te3基热电材料的热电性能,其主要由热电优值(ZT)决定.本文通过水热法成功制备了具有纳米花形貌的LuxBi2-xTe3粉体,并对制备的纳米粉体分别进行XRD和SEM表征,讨论了Lu元素掺杂和乙二胺四乙酸(EDTA)用量对LuxBi2-xTe3纳米花粉体形貌的影响,结果表明:Lu元素掺杂不利于纳米花形貌的形成,而EDTA用量的合适选取对于纳米花形貌的形成起着至关重要的作用.接着采用热压法将LuxBi2-xTe3纳米花粉体压制成致密块体,讨论了Lu元素掺杂对LuxBi2-xTe3块体热电性能的影响,结果表明:Lu掺杂和纳米花形貌有利于提高样品的功率因子同时保持较低的热导率,从而可以达到较高的ZT值;Lu0.2Bi1.8Te3样品和Lu0.25Bi1.75Te3样品的ZT值均高于区域熔炼商用Bi2Te3块体的值,并且Lu0.25Bi1.75Te3样品的ZT值在测温范围内均高于1,其ZT值在473 K时达到了1.14,高于其他相关报道的n型块体的值.这一研究为提高Bi2Te3基合金热电材料的热电性能提供了一个新的途径.关键词:LuxBi2-xTe3粉体;Lu元素掺杂;EDTA用量;纳米花形貌;热电性能中图分类号:TG146.4 文献标志码:A 文章编号:1000-1565(2023)01-0058-09Preparation and thermoelectric properties of the LuxBi<sub>2-xTe3 alloys with nanoflower morphologyWU Fang1, WANG Wei2(1.College of Artificial Intelligence, Henan Finance University, Zhengzhou 450046, China;2.College of Information Engineering, Zhengzhou University of Technology, Zhengzhou 450044, China)Abstract: The Bi2Te3 based materials have good thermoelectric properties around room temperatures. The themoelectric properties of the Bi2Te3 based alloys can be improved by nanotechnology and element doping. In this paper the LuxBi2-xTe3 nanopowders with nanoflowers morphology were synthesize by hydrothermal method, and the phase structure and micro-topography of the nanopowders were investigated by X-ray diffractometer(XRD)and a field-emission scanning electron microscopy(FESEM). The effects of the Lu doping and the ethylene diamine tetraacetic acid(EDTA)amounts on the morphology of the nanopowders were investigated. The results showed that the Lu doping is not beneficial to form nanoflowers morphology, and it is vital to select proper amounts of EDTA for forming nanoflowers morphology of the nanopowders. Subsequently, the LuxBi2-xTe3 bulk were synthesized by hot- 收稿日期:2022-05-23 基金项目:河南省重点科技攻关项目(212102210599) 第一作者:吴芳(1982—),女,河南焦作人,河南财政金融学院副教授,博士,主要从事薄膜材料、热电材料等方向研究.E-mail:fwu082@126.com第1期吴芳等:具有花状形貌LuxBi2-xTe3合金的制备及性能pressing method, and the effects of the Lu doping on the thermoelectric properties of the LuxBi2-xTe3 bulk were also investigated. The results showed that the Lu doping and the nanoflowers morphology are helpful to increase the power factor and are also helpful to keep lower thermal conductivity, leading to a high ZT value. The ZT values of the Lu0.2Bi1.8Te3 and Lu0.25Bi1.75Te3 sample are all higher than the commercial zone melting Bi2Te3 ingots. And the ZT values of the Lu0.25Bi1.75Te3 sample are all higher than 1 in the whole testing temperature range, and the optimum value reached 1.14 at 473 K which is higher than that of other reported n type Bi2Te3. This study provides a new way to improve the thermoelectric properties of the Bi2Te3 based alloys.

Key words： LuxBi2-xTe3 nanopodwers; the Lu doping; the EDTA amounts; nanoflowers morphology; thermoelectric properties

Cite this article

WU Fang , WANG Wei . Preparation and thermoelectric properties of the LuxBi<sub>2-xTe3 alloys with nanoflower morphology[J]. Journal of Hebei University(Natural Science Edition), 2023 , 43(1) : 58 -66 . DOI: 10.3969/j.issn.1000-1565.2023.01.009

References

[1] TWAHA S, ZHU J, YAN Y Y, et al. A comprehensive review of thermoelectric technology: Materials, applications, modelling and performance improvement[J]. Renew Sustain Energy Rev, 2016, 65: 698-726. DOI:10.1016/j.rser.2016.07.034.
[2] HE J, TRITT T M. Advances in thermoelectric materials research: looking back and moving forward[J]. Science, 2017, 357(6358): eaak9997. DOI:10.1126/science.aak9997.
[3] XU B, FENG T L, LI Z, et al. Large-scale, solution-synthesized nanostructured composites for thermoelectric applications[J]. Adv Mater, 2018, 30(48): 1801904. DOI:10.1002/adma.201801904.
[4] MAO J, CHEN G, REN Z F. Thermoelectric cooling materials[J]. Nat Mater, 2021, 20(4): 454-461. DOI:10.1038/s41563-020-00852-w.
[5] ASWAL D K, BASU R, SINGH A. Key issues in development of thermoelectric power generators: high figure-of-merit materials and their highly conducting interfaces with metallic interconnects[J]. Energy Convers Manag, 2016, 114: 50-67. DOI:10.1016/j.enconman.2016.01.065.
[6] DOMÍNGUEZ-ADAME F, MARTÍN-GONZÁLEZ M, SÁNCHEZ D, et al. Nanowires: a route to efficient thermoelectric devices[J]. Physica E Low Dimens Syst Nanostruct, 2019, 113: 213-225. DOI:10.1016/j.physe.2019.03.021.
[7] CHEN Y, HOU X N, MA C Y, et al. Review of development status of Bi2Te3-based semiconductor thermoelectric power generation[J]. Adv Mater Sci Eng, 2018, 2018: 1210562. DOI:10.1155/2018/1210562.
[8] MA Z, WEI J T, SONG P S, et al. Review of experimental approaches for improving ZT of thermoelectric materials[J]. Mater Sci Semicond Process, 2021, 121: 105303. DOI:10.1016/j.mssp.2020.105303.
[9] ZHAO C, LI Z, FAN T, et al. Defects engineering with multiple dimensions in thermoelectric materials[J]. Research(Wash D C), 2020, 2020: 9652749. DOI:10.34133/2020/9652749.
[10] YAN X, POUDEL B, MA Y, et al. Experimental studies on anisotropic thermoelectric properties and structures of n-type Bi2Te2.7Se0.3[J]. Nano Lett, 2010, 10(9): 3373-3378. DOI:10.1021/nl101156v.
[11] ZHAO Y, BURDA C. Chemical synthesis of Bi(0.5)Sb(1.5)Te3 nanocrystals and their surface oxidation properties[J]. ACS Appl Mater Interfaces, 2009, 1(6): 1259-1263. DOI:10.1021/am900148d.
[12] YIM W M, ROSI F D. Compound tellurides and their alloys for Peltier cooling-A review[J]. Solid State Electron, 1972, 15(10): 1121-1140. DOI:10.1016/0038-1101(72)90172-4.
[13] ZHENG Y, XIE H Y, ZHANG Q, et al. Unraveling the critical role of melt-spinning atmosphere in enhancing the thermoelectric performance of p-type Bi0.52Sb1.48Te3 alloys[J]. ACS Appl Mater Interfaces, 2020, 12(32): 36186-36195. DOI:10.1021/acsami.0c09656.
[14] BAO D Y, CHEN J, YU Y, et al. Texture-dependent thermoelectric properties of nano-structured Bi2Te3[J]. Chem Eng J, 2020, 388: 124295. DOI:10.1016/j.cej.2020.124295.
[15] WANG Y, LIU W D, SHI X L, et al. Enhanced thermoelectric properties of nanostructured n-type Bi2Te3 by suppressing Te vacancy through non-equilibrium fast reaction[J]. Chem Eng J, 2020, 391: 123513. DOI:10.1016/j.cej.2019.123513.
[16] WU F, SONG H Z, GAO F, et al. Effects of different morphologies of Bi2Te3 nanopowders on thermoelectric properties[J]. J Electron Mater, 2013, 42(6): 1140-1145. DOI:10.1007/s11664-013-2541-z.
[17] WU F, SONG H Z, JIA J F, et al. Effects of Ce, Y, and Sm doping on the thermoelectric properties of Bi2Te3 alloy[J]. Prog Nat Sci Mater, 2013, 23(4): 408-412. DOI:10.1016/j.pnsc.2013.06.007.
[18] 周欢欢,檀柏梅,张建新,等. Bi2Te3热电材料研究现状[J].半导体技术, 2011, 36(10): 765-770, 777.
[19] ZHAO Q, WANG Y G. A facile two-step hydrothermal route for the synthesis of low-dimensional structured Bi2Te3 nanocrystals with various morphologies[J]. J Alloys Compd, 2010, 497(1/2): 57-61. DOI:10.1016/j.jallcom.2010.03.077.
[20] DENG Y, NAN C W, WEI G D, et al. Organic-assisted growth of bismuth telluride nanocrystals[J]. Chem Phys Lett, 2003, 374(3/4): 410-415. DOI:10.1016/S0009-2614(03)00783-8.
[21] LIU W S, YAN X, CHEN G, et al. Recent advances in thermoelectric nanocomposites[J]. Nano Energy, 2012, 1(1): 42-56. DOI:10.1016/j.nanoen.2011.10.001.
[22] SNYDER G J, TOBERER E S. Complex thermoelectric materials[J]. Nat Mater, 2008, 7(2): 105-114. DOI:10.1038/nmat2090.
[23] WANG S Y, XIE W J, LI H, et al. Enhanced performances of melt spun Bi2(Te, Se)3 for n-type thermoelectric legs[J]. Intermetallics, 2011, 19(7): 1024-1031. DOI:10.1016/j.intermet.2011.03.006.
[24] YU F R, XU B, ZHANG J J, et al. Structural and thermoelectric characterizations of high pressure sintered nanocrystalline Bi2Te3 bulks[J]. Mater Res Bull, 2012, 47(6): 1432-1437. DOI:10.1016/j.materresbull.2012.02.045.
[25] YANG L, CHEN Z G, HONG M, et al. Enhanced thermoelectric performance of nanostructured Bi2Te3 through significant phonon scattering[J]. ACS Appl Mater Interfaces, 2015, 7(42): 23694-23699. DOI:10.1021/acsami.5b07596.
[26] FU J P, SONG S Y, ZHANG X G, et al. Bi2Te3 nanoplates and nanoflowers: Synthesized by hydrothermal process and their enhanced thermoelectric properties[J]. Cryst Eng Comm, 2012, 14(6): 2159. DOI:10.1039/c2ce06348d.
[27] ZHANG Y C, DAY T, SNEDAKER M L, et al. A mesoporous anisotropic n-type Bi2Te3 monolith with low thermal conductivity as an efficient thermoelectric material[J]. Adv Mater, 2012, 24(37): 5065-5070. DOI:10.1002/adma.201201974. (
Options
Outlines

/

〈 〉