In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 46, No. 32 ( 2022), p. 15701-15711
Abstract:
Selective detection of noxious gases at low temperature is imperative in some industrial applications. In this work, pure and Sm-doped SnS 2 /ZnS hierarchical microspheres were prepared by a sequential reflux condensation and hydrothermal process. The morphology, crystalline structure, defect density and chemistry composition of the as-prepared samples have been analyzed by SEM, TEM, PL, XRD and XPS spectra. Compared with sensors based on pure SnS 2 /ZnS samples, the 3.0 at% Sm-doped SnS 2 /ZnS samples exhibited a remarkable enhancement in triethylamine-sensing performance at room temperature (∼20 °C), including higher response, fast response/recovery speed, low detection limit and good selectivity. The improved gas sensing performance may be attributed to the SnS 2 /ZnS n–n nanoheterojunction, high crystal defect density, Sm 2+ /Sm 3+ redox pairs, grain boundaries and gas channels in the sample. In addition, the gas sensing mechanism of the Sm-doped SnS 2 /ZnS hierarchical microspheres was also analyzed.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
1472933-7
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