TY - JOUR
T1 - Tailoring the composition of nanostructured tin sulfide synthesized by a gas–liquid reaction method: Correlation with the relative permittivity of the solvent
T2 - Correlation with the relative permittivity of the solvent
AU - Castelo-González, O.A.
AU - García-Valenzuela, J.A.
AU - Cabrera-German, D.
AU - Cota-Leal, M.
AU - Sotelo-Lerma, M.
AU - Hu, H.
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/1
Y1 - 2019/1
N2 - A simple gas–liquid reaction method between H2S vapor and a SnCl2 solution is employed for tin sulfide synthesis under standard conditions. Four different solvents, that present a distinct relative permittivity, have been used to dissolve the SnCl2 salt: water, ethylene glycol, polyethylene glycol, and 1,2-dichlorobenzene. From the EDXS, XPS, and XRD techniques, it is inferred that the products are composed of a mix of SnS and SnS2, being the composition strongly dependent on the type of solvent. It is concluded that a higher relative permittivity of the solvent, usually translated into a higher polarity, prevents the oxidation of tin(II) to tin(IV), thus diminishing the formation of the SnS2 fraction in the tin sulfide product. Therefore, by employing solvents with different relative permittivity values it is possible to modulate the final composition of the nanostructured tin sulfide material synthesized by the gas–liquid reaction. This control is of utter importance for a wide range of applications of this semiconducting material.
AB - A simple gas–liquid reaction method between H2S vapor and a SnCl2 solution is employed for tin sulfide synthesis under standard conditions. Four different solvents, that present a distinct relative permittivity, have been used to dissolve the SnCl2 salt: water, ethylene glycol, polyethylene glycol, and 1,2-dichlorobenzene. From the EDXS, XPS, and XRD techniques, it is inferred that the products are composed of a mix of SnS and SnS2, being the composition strongly dependent on the type of solvent. It is concluded that a higher relative permittivity of the solvent, usually translated into a higher polarity, prevents the oxidation of tin(II) to tin(IV), thus diminishing the formation of the SnS2 fraction in the tin sulfide product. Therefore, by employing solvents with different relative permittivity values it is possible to modulate the final composition of the nanostructured tin sulfide material synthesized by the gas–liquid reaction. This control is of utter importance for a wide range of applications of this semiconducting material.
KW - Dielectric constant
KW - Gas–liquid reaction
KW - Nanostructures
KW - Tin sulfide
KW - X-ray photoelectron spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85056003172&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2018.10.030
DO - 10.1016/j.matchemphys.2018.10.030
M3 - Artículo
SN - 0254-0584
VL - 222
SP - 333
EP - 337
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -