Modified polyol synthesis of bulk-scale nanostructured bismuth antimony telluride

M. E. Anderson, S. S.N. Bharadwaya, Raymond Edward Schaak

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Bismuth antimony telluride, Bi0.5Sb1.5Te3, is a prototype thermoelectric alloy for which nanostructuring has been shown to improve the thermoelectric figure of merit. Most bulk-scale nanostructured thermoelectric materials are synthesized using either traditional solid-state routes or "top-down" physical methods such as ball milling, sputtering, etc. "Bottom-up" chemical methods represent an important alternative route to nanostructured thermoelectrics, but often produce small sample sizes that make transport measurements difficult. Here, nanostructured Bi0.5Sb1.5Te3 has been synthesized in half-gram quantities using a simple and scalable modified polyol process. Stoichiometric amounts of appropriate metal salts were combined in tetraethylene glycol with and without poly(vinylpyrrolidone) (PVP), reduced with sodium borohydride, and heated in solution and in powder form to obtain samples of crystalline Bi 0.5Sb1.5Te3. The structure, composition, and morphology of the products were characterized using powder XRD, TEM, SEM, and EDS mapping data. The Seebeck coefficient, measured from 300-500 K for 1 cm sintered pellets of Bi0.5Sb1.5Te3, increased with temperature and was found to be +256 V K-1 at 500 K. Bulk-scale nanostructured powders of other thermoelectrics could also be synthesized, including Bi2Te3, PbTe, Sb2Te3, AgSbTe2, and Pb1-xSnxTe.

Original languageEnglish (US)
Pages (from-to)8362-8367
Number of pages6
JournalJournal of Materials Chemistry
Volume20
Issue number38
DOIs
StatePublished - Oct 14 2010

Fingerprint

Antimony
Bismuth
Polyols
Powders
Glycols
Seebeck coefficient
Ball milling
Sputtering
Energy dispersive spectroscopy
Salts
Metals
Sodium
Crystalline materials
Transmission electron microscopy
Scanning electron microscopy
Chemical analysis
polyol
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

@article{fe29df58e5f8465099f8d99c84916843,
title = "Modified polyol synthesis of bulk-scale nanostructured bismuth antimony telluride",
abstract = "Bismuth antimony telluride, Bi0.5Sb1.5Te3, is a prototype thermoelectric alloy for which nanostructuring has been shown to improve the thermoelectric figure of merit. Most bulk-scale nanostructured thermoelectric materials are synthesized using either traditional solid-state routes or {"}top-down{"} physical methods such as ball milling, sputtering, etc. {"}Bottom-up{"} chemical methods represent an important alternative route to nanostructured thermoelectrics, but often produce small sample sizes that make transport measurements difficult. Here, nanostructured Bi0.5Sb1.5Te3 has been synthesized in half-gram quantities using a simple and scalable modified polyol process. Stoichiometric amounts of appropriate metal salts were combined in tetraethylene glycol with and without poly(vinylpyrrolidone) (PVP), reduced with sodium borohydride, and heated in solution and in powder form to obtain samples of crystalline Bi 0.5Sb1.5Te3. The structure, composition, and morphology of the products were characterized using powder XRD, TEM, SEM, and EDS mapping data. The Seebeck coefficient, measured from 300-500 K for 1 cm sintered pellets of Bi0.5Sb1.5Te3, increased with temperature and was found to be +256 V K-1 at 500 K. Bulk-scale nanostructured powders of other thermoelectrics could also be synthesized, including Bi2Te3, PbTe, Sb2Te3, AgSbTe2, and Pb1-xSnxTe.",
author = "Anderson, {M. E.} and Bharadwaya, {S. S.N.} and Schaak, {Raymond Edward}",
year = "2010",
month = "10",
day = "14",
doi = "10.1039/c0jm01424a",
language = "English (US)",
volume = "20",
pages = "8362--8367",
journal = "Journal of Materials Chemistry",
issn = "0959-9428",
publisher = "Royal Society of Chemistry",
number = "38",

}

Modified polyol synthesis of bulk-scale nanostructured bismuth antimony telluride. / Anderson, M. E.; Bharadwaya, S. S.N.; Schaak, Raymond Edward.

In: Journal of Materials Chemistry, Vol. 20, No. 38, 14.10.2010, p. 8362-8367.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Modified polyol synthesis of bulk-scale nanostructured bismuth antimony telluride

AU - Anderson, M. E.

AU - Bharadwaya, S. S.N.

AU - Schaak, Raymond Edward

PY - 2010/10/14

Y1 - 2010/10/14

N2 - Bismuth antimony telluride, Bi0.5Sb1.5Te3, is a prototype thermoelectric alloy for which nanostructuring has been shown to improve the thermoelectric figure of merit. Most bulk-scale nanostructured thermoelectric materials are synthesized using either traditional solid-state routes or "top-down" physical methods such as ball milling, sputtering, etc. "Bottom-up" chemical methods represent an important alternative route to nanostructured thermoelectrics, but often produce small sample sizes that make transport measurements difficult. Here, nanostructured Bi0.5Sb1.5Te3 has been synthesized in half-gram quantities using a simple and scalable modified polyol process. Stoichiometric amounts of appropriate metal salts were combined in tetraethylene glycol with and without poly(vinylpyrrolidone) (PVP), reduced with sodium borohydride, and heated in solution and in powder form to obtain samples of crystalline Bi 0.5Sb1.5Te3. The structure, composition, and morphology of the products were characterized using powder XRD, TEM, SEM, and EDS mapping data. The Seebeck coefficient, measured from 300-500 K for 1 cm sintered pellets of Bi0.5Sb1.5Te3, increased with temperature and was found to be +256 V K-1 at 500 K. Bulk-scale nanostructured powders of other thermoelectrics could also be synthesized, including Bi2Te3, PbTe, Sb2Te3, AgSbTe2, and Pb1-xSnxTe.

AB - Bismuth antimony telluride, Bi0.5Sb1.5Te3, is a prototype thermoelectric alloy for which nanostructuring has been shown to improve the thermoelectric figure of merit. Most bulk-scale nanostructured thermoelectric materials are synthesized using either traditional solid-state routes or "top-down" physical methods such as ball milling, sputtering, etc. "Bottom-up" chemical methods represent an important alternative route to nanostructured thermoelectrics, but often produce small sample sizes that make transport measurements difficult. Here, nanostructured Bi0.5Sb1.5Te3 has been synthesized in half-gram quantities using a simple and scalable modified polyol process. Stoichiometric amounts of appropriate metal salts were combined in tetraethylene glycol with and without poly(vinylpyrrolidone) (PVP), reduced with sodium borohydride, and heated in solution and in powder form to obtain samples of crystalline Bi 0.5Sb1.5Te3. The structure, composition, and morphology of the products were characterized using powder XRD, TEM, SEM, and EDS mapping data. The Seebeck coefficient, measured from 300-500 K for 1 cm sintered pellets of Bi0.5Sb1.5Te3, increased with temperature and was found to be +256 V K-1 at 500 K. Bulk-scale nanostructured powders of other thermoelectrics could also be synthesized, including Bi2Te3, PbTe, Sb2Te3, AgSbTe2, and Pb1-xSnxTe.

UR - http://www.scopus.com/inward/record.url?scp=77957084921&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957084921&partnerID=8YFLogxK

U2 - 10.1039/c0jm01424a

DO - 10.1039/c0jm01424a

M3 - Article

AN - SCOPUS:77957084921

VL - 20

SP - 8362

EP - 8367

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

IS - 38

ER -