Synthesis and study of gas-sensitive nanostructures of the Zn–Sn–O system
S.S. Nalimova1, Z.V. Shomakhov2, K.N. Punegova1, A.A. Ryabko1, A.I. Maximov1
1 Saint Petersburg Electrotechnical University «LETI»
2 Kabardino-Balkarian State University
DOI: 10.26456/pcascnn/2021.13.910
Original article
Abstract: Zinc oxide nanorods were synthesized by the hydrothermal method. The obtained samples were processed in an aqueous-alcohol solution of potassium stannate and urea at 170 °C during different times. As a result, Zn–Sn–O nanostructures were obtained. The surface chemical composition of ZnO and Zn–Sn–O was studied using the X-ray photoelectron spectroscopy. Its sensitivity to vapors of isopropyl alcohol (1000 ppm) at 120 °C, 180 °C, 250°C was analyzed. The electron density redistribution during the Zn–Sn–O composite nanostructures formation manifests itself in the chemical shift of the O1s and Zn2p peaks. It confirm the rearrangement of chemical bonds when zinc atoms are replaced by tin ones. It was found that the sensitivity of composite structures to isopropyl alcohol vapors significantly exceeds that of ZnO in the entire temperature range under study. The improvement of gas-sensitive properties is associated with the presence of various types of surface centers in the Zn–Sn–O samples that participate in the adsorption and oxidation of isopropyl alcohol.
Keywords: zinc oxide, zinc stannate, gas sensors, nanorods, X-ray photoelectron spectroscopy
- Svetlana S. Nalimova – Ph. D., Docent, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Zamir V. Shomakhov – Ph. D., Docent, Electronics and Digital Information Technologies Department, Kabardino-Balkarian State University
- Ksenia N. Punegova – undergraduate student, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Andrey A. Ryabko – Junior Researcher, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Aleksandr I. Maximov – Ph. D., Docent of Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
Reference:
Nalimova, S.S. Synthesis and study of gas-sensitive nanostructures of the Zn–Sn–O system / S.S. Nalimova, Z.V. Shomakhov, K.N. Punegova, A.A. Ryabko, A.I. Maximov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2021. — I. 13. — P. 910-918. DOI: 10.26456/pcascnn/2021.13.910. (In Russian).
Full article (in Russian): download PDF file
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