Towards new thermoelectrics: tin selenide/modified graphene oxide nanocomposites

Iryna Protsak; Simon Champet; Chang-Yang Chiang; Wuzong Zhou; Srinivas Popuri; Jan-Willem Bos; Dinesh Misra; Yevhenii Morozov; Duncan Gregory

doi:10.1021/acsomega.8b03146

Towards new thermoelectrics: tin selenide/modified graphene oxide nanocomposites

Iryna Protsak, Simon Champet, Chang-Yang Chiang, Wuzong Zhou, Srinivas Popuri, Jan-Willem Bos, Dinesh Misra, Yevhenii Morozov, Duncan Gregory

Research output: Contribution to journal › Article › peer-review

Abstract

New nanocomposites have been prepared by combining tin selenide (SnSe) with graphene oxide (GO) in a simple aqueous solution process followed by ice templating (freeze casting). The resulting integration of SnSe within the GO matrix leads to modifications of electrical transport properties and the possibility of influencing the power factor (S²σ). Moreover, these transport properties can then be further improved (S, σ increased) by funtionalisation of the GO surface to form modified nanocomposites (SnSe/GO_mod) with enhanced power factors in comparison to unmodified nanocomposites (SnSe/GO) and “bare” SnSe itself. Functionalising the GO by reaction with octadecyltrimethoxysilane (ODTS; C₂₁H₄₆O₃Si) and triethylamine (TEA;(CH₃CH₂)₃N) switches SnSe from p-type to n-type conductivity with an appreciable Seebeck coefficient and high electrical conductivity (1257 S·m^-1at 539 K); yielding a 20-fold increase in the power factor compared to SnSe itself, prepared by the same route. These findings present new possibilities to design inexpensive and porous nanocomposites based on metal chalcogenides and functionalized carbon-derived matrices.

Original language	English
Pages (from-to)	6010-6019
Number of pages	10
Journal	ACS Omega
Volume	4
Issue number	3
Early online date	29 Mar 2019
DOIs	https://doi.org/10.1021/acsomega.8b03146
Publication status	Published - 31 Mar 2019

Keywords

SnSe
Graphene oxide
Functionalisation
Nanocomposites
Thermoelectric properties

Access to Document

10.1021/acsomega.8b03146

SnSe_R2_accepted
Copyright © 2019 American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acsomega.8b03146
Accepted author manuscript, 1.48 MB

Cite this

@article{30201038b82644ac9b640ae7ddbededa,

title = "Towards new thermoelectrics: tin selenide/modified graphene oxide nanocomposites",

abstract = "New nanocomposites have been prepared by combining tin selenide (SnSe) with graphene oxide (GO) in a simple aqueous solution process followed by ice templating (freeze casting). The resulting integration of SnSe within the GO matrix leads to modifications of electrical transport properties and the possibility of influencing the power factor (S2σ). Moreover, these transport properties can then be further improved (S, σ increased) by funtionalisation of the GO surface to form modified nanocomposites (SnSe/GOmod) with enhanced power factors in comparison to unmodified nanocomposites (SnSe/GO) and “bare” SnSe itself. Functionalising the GO by reaction with octadecyltrimethoxysilane (ODTS; C21H46O3Si) and triethylamine (TEA;(CH3CH2)3N) switches SnSe from p-type to n-type conductivity with an appreciable Seebeck coefficient and high electrical conductivity (1257 S·m-1 at 539 K); yielding a 20-fold increase in the power factor compared to SnSe itself, prepared by the same route. These findings present new possibilities to design inexpensive and porous nanocomposites based on metal chalcogenides and functionalized carbon-derived matrices.",

keywords = "SnSe, Graphene oxide, Functionalisation, Nanocomposites, Thermoelectric properties",

author = "Iryna Protsak and Simon Champet and Chang-Yang Chiang and Wuzong Zhou and Srinivas Popuri and Jan-Willem Bos and Dinesh Misra and Yevhenii Morozov and Duncan Gregory",

note = "This work was financially supported by the EPSRC (EP/P510968/1).",

year = "2019",

month = mar,

day = "31",

doi = "10.1021/acsomega.8b03146",

language = "English",

volume = "4",

pages = "6010--6019",

journal = "ACS Omega",

issn = "2470-1343",

publisher = "American Chemical Society (ACS)",

number = "3",

}

TY - JOUR

T1 - Towards new thermoelectrics

T2 - tin selenide/modified graphene oxide nanocomposites

AU - Protsak, Iryna

AU - Champet, Simon

AU - Chiang, Chang-Yang

AU - Zhou, Wuzong

AU - Popuri, Srinivas

AU - Bos, Jan-Willem

AU - Misra, Dinesh

AU - Morozov, Yevhenii

AU - Gregory, Duncan

N1 - This work was financially supported by the EPSRC (EP/P510968/1).

PY - 2019/3/31

Y1 - 2019/3/31

N2 - New nanocomposites have been prepared by combining tin selenide (SnSe) with graphene oxide (GO) in a simple aqueous solution process followed by ice templating (freeze casting). The resulting integration of SnSe within the GO matrix leads to modifications of electrical transport properties and the possibility of influencing the power factor (S2σ). Moreover, these transport properties can then be further improved (S, σ increased) by funtionalisation of the GO surface to form modified nanocomposites (SnSe/GOmod) with enhanced power factors in comparison to unmodified nanocomposites (SnSe/GO) and “bare” SnSe itself. Functionalising the GO by reaction with octadecyltrimethoxysilane (ODTS; C21H46O3Si) and triethylamine (TEA;(CH3CH2)3N) switches SnSe from p-type to n-type conductivity with an appreciable Seebeck coefficient and high electrical conductivity (1257 S·m-1 at 539 K); yielding a 20-fold increase in the power factor compared to SnSe itself, prepared by the same route. These findings present new possibilities to design inexpensive and porous nanocomposites based on metal chalcogenides and functionalized carbon-derived matrices.

AB - New nanocomposites have been prepared by combining tin selenide (SnSe) with graphene oxide (GO) in a simple aqueous solution process followed by ice templating (freeze casting). The resulting integration of SnSe within the GO matrix leads to modifications of electrical transport properties and the possibility of influencing the power factor (S2σ). Moreover, these transport properties can then be further improved (S, σ increased) by funtionalisation of the GO surface to form modified nanocomposites (SnSe/GOmod) with enhanced power factors in comparison to unmodified nanocomposites (SnSe/GO) and “bare” SnSe itself. Functionalising the GO by reaction with octadecyltrimethoxysilane (ODTS; C21H46O3Si) and triethylamine (TEA;(CH3CH2)3N) switches SnSe from p-type to n-type conductivity with an appreciable Seebeck coefficient and high electrical conductivity (1257 S·m-1 at 539 K); yielding a 20-fold increase in the power factor compared to SnSe itself, prepared by the same route. These findings present new possibilities to design inexpensive and porous nanocomposites based on metal chalcogenides and functionalized carbon-derived matrices.

KW - SnSe

KW - Graphene oxide

KW - Functionalisation

KW - Nanocomposites

KW - Thermoelectric properties

U2 - 10.1021/acsomega.8b03146

DO - 10.1021/acsomega.8b03146

M3 - Article

C2 - 31459748

SN - 2470-1343

VL - 4

SP - 6010

EP - 6019

JO - ACS Omega

JF - ACS Omega

IS - 3

ER -

Towards new thermoelectrics: tin selenide/modified graphene oxide nanocomposites

Abstract

Keywords

Access to Document

Fingerprint

Cite this