Bismuth Telluride (Bi2Te3) Nanostructure for Thermoelectric Applications

Year 2019, Volume: 3 Issue: 1, 1 - 7, 30.06.2019

Hayati Mamur , Mohammad Ruhul Amin Bhuıyan

Abstract

The bismuth telluride (Bi₂Te₃) nanostructure is the most commonly used in
thermoelectric (TE) applications. The different processes are utilized to
produce the Bi₂Te₃
nanostructure. Herein, the used process is an efficient and cost effective
two-step co-precipitation chemical solution route. The process has been formed
by dissolving the bismuth (III) nitrate pentahydrate, Bi(NO3)3.5H2O and
tellurium dioxide, TeO2 into the same inorganic nitric acid, HNO3 with the
two-step co-precipitation of sodium hydroxide, NaOH and sodium borohydride,
HNaB4. The characterizing tools such as x-ray diffraction (XRD), ultraviolet
absorbance (UV), fourier transform infrared spectrometry (FTIR), scanning
electron microscopy (SEM), energy dispersive analysis of x-ray (EDAX), atomic
force microscopy (AFM), and transmission electron microscopy (TEM) were
employed to produce the Bi₂Te₃ powders. According to these results, the obtained powders
have been confirmed as a nanostructure form of about low dimension that can be
easily used in TE applications.

Keywords

Bismuth telluride (Bi2Te3), Nanostructures, Chemical solution route, Structural and microstructural characterization, Optical characterization

Bismuth Telluride (Bi2Te3) Nanostructure for Thermoelectric Applications

Abstract

The bismuth telluride (Bi₂Te₃) nanostructure is the most commonly used in
thermoelectric (TE) applications. The different processes are utilized to
produce the Bi₂Te₃
nanostructure. Herein, the used process is an efficient and cost effective
two-step co-precipitation chemical solution route. The process has been formed
by dissolving the bismuth (III) nitrate pentahydrate, Bi(NO₃)₃.5H₂O
and tellurium dioxide, TeO₂ into the same inorganic nitric acid,
HNO3 with the two-step co-precipitation of sodium hydroxide, NaOH and sodium
borohydride, HNaB4. The characterizing tools such as x-ray diffraction (XRD),
ultraviolet absorbance (UV), fourier transform infrared spectrometry (FTIR),
scanning electron microscopy (SEM), energy dispersive analysis of x-ray (EDAX),
atomic force microscopy (AFM), and transmission electron microscopy (TEM) were
employed to produce the Bi₂Te₃ powders. According to these results, the obtained powders
have been confirmed as a nanostructure form of about low dimension that can be
easily used in TE applications.

Keywords

Bismuth telluride (Bi2Te3); Nanostructures; Chemical solution route; Structural and microstructural characterization; Optical characterization

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