Changes in the Energy of Surface Adsorption Sites of ZnO Doped with Sn

Z. V. Shomakhov; Шомахов З. В.; S. S. Nalimova; Налимова С. С.; V. M. Kondratev; Кондратьев В. М.; A. I. Maksimov; Максимов А. И.; А. А. Ryabko; Рябко А. А.; V. A. Moshnikov; Мошников В. А.; O. A. Molokanov; Молоканов О. А.

doi:10.31857/S1028096023080137

Changes in the Energy of Surface Adsorption Sites of ZnO Doped with Sn

Authors: Shomakhov Z.V.¹, Nalimova S.S.², Kondratev V.M.²^,3, Maksimov A.I.², Ryabko А.А.⁴, Moshnikov .A.², Molokanov O.A.¹
Affiliations:
1. Kabardino-Balkarian State University
2. Saint-Petersburg Electrotechnical University “LETI”
3. Moscow Institute of Physics and Technology
4. Ioffe Institute
Issue: No 8 (2023)
Pages: 58-63
Section: Articles
URL: https://journal-vniispk.ru/1028-0960/article/view/137798
DOI: https://doi.org/10.31857/S1028096023080137
EDN: https://elibrary.ru/OADAEC
ID: 137798

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Abstract

Nowadays an important task is the development of nanostructures of Zn–Sn–O ternary oxide system, which are of practical interest for various fields, including gas sensors and photocatalysts, lithium-ion batteries, and solar cells. Zinc stannate nanowires were formed by hydrothermal treatment of preliminary synthesized zinc oxide nanowires in a solution of potassium stannate and carbamide. Using scanning electron microscopy and backscattered electron diffraction, the samples were found to have a Zn₂SnO₄ structure, and their geometric dimensions did not change compared to the initial zinc oxide nanowires. The diameter of the obtained structures is about 300 nm, and the length is about 2 μm. According to X-ray photoelectron spectroscopy data, as a result of hydrothermal treatment, the surface structure changes, tin atoms are incorporated into the crystal structure of zinc oxide. A study of the gas-sensitive properties of the Zn₂SnO₄ layers have shown that they are more efficient in detecting isopropyl alcohol vapors compared to the initial zinc oxide nanowires. Zn₂SnO₄ layers allow detecting isopropyl alcohol vapors at temperatures of about 150°C. The sensor signal with respect to 1000 ppm C₃H₇OH is 3.79.

Keywords

zinc stannate, Zn₂SnO₄, hydrothermal synthesis, nanowires, nanostructures, gas sensors, X-ray photoelectron spectroscopy, chemical shift, zinc oxide, isopropyl alcohol vapor.

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