Issue 46, 2018

Synthesis of Bi2−2xSb2xS3 (0 ≤ x ≤ 1) solid solutions from solventless thermolysis of metal xanthate precursors

Abstract

Tris(O-ethylxanthate)bismuth(III) (1) and tris(O-ethylxanthate)antimony(III) (2) were synthesized and used as precursors for the preparation of Bi2−2xSb2xS3 alloys (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) using solventless thermolysis. The p-XRD peaks at all ratios corresponded well to an orthorhombic crystal structure between that of Bi2S3 and Sb2S3. The lattice parameters a and b were found to increase linearly as the Sb content increases in the Bi2−2xSb2xS3 samples, whereas c decreases gradually with increasing Sb. For all samples the elemental composition and uniform stoichiometry was determined by EDX analysis and ICP-OES. Incorporation of Sb into Bi2S3 led to an increase in the band gap from 1.66 eV at x = 0 to 2.19 eV at x = 1. The morphologies of the alloys were investigated using SEM, revealing different texturing as the composition changes from Bi2S3 to Sb2S3.

Graphical abstract: Synthesis of Bi2−2xSb2xS3 (0 ≤ x ≤ 1) solid solutions from solventless thermolysis of metal xanthate precursors

Supplementary files

Article information

Article type
Paper
Submitted
16 May 2018
Accepted
18 Sep 2018
First published
12 Nov 2018
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2018,6, 12652-12659

Synthesis of Bi2−2xSb2xS3 (0 ≤ x ≤ 1) solid solutions from solventless thermolysis of metal xanthate precursors

T. Alqahtani, M. D. Khan, D. J. Kelly, S. J. Haigh, D. J. Lewis and P. O’Brien, J. Mater. Chem. C, 2018, 6, 12652 DOI: 10.1039/C8TC02374C

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