Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films
Thin nanocomposite films composed of ZnO and SnO<sub>2</sub> at 0.5–5 mol.% concentrations were synthesized by a new solid-phase low-temperature pyrolysis under the developed protocols. This hetero-oxide material was thoroughly studied by X-ray diffraction analysis (XRD), scanning electr...
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MDPI AG
2021-05-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/9/6/124 |
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| author | Victor V. Petrov Victor V. Sysoev Aleksandra P. Starnikova Maria G. Volkova Zamir Kh. Kalazhokov Viktoriya Yu. Storozhenko Soslan A. Khubezhov Ekaterina M. Bayan |
| author_facet | Victor V. Petrov Victor V. Sysoev Aleksandra P. Starnikova Maria G. Volkova Zamir Kh. Kalazhokov Viktoriya Yu. Storozhenko Soslan A. Khubezhov Ekaterina M. Bayan |
| author_sort | Victor V. Petrov |
| collection | DOAJ |
| description | Thin nanocomposite films composed of ZnO and SnO<sub>2</sub> at 0.5–5 mol.% concentrations were synthesized by a new solid-phase low-temperature pyrolysis under the developed protocols. This hetero-oxide material was thoroughly studied by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) techniques to be compared with electrical and gas-sensing properties. We have found that the films have a poly-nanocrystal structure of ZnO and SnO<sub>2</sub> crystals with characteristic grain sizes at 10–15 nm range. When comparing the chemiresistive response of the films with varied tin dioxide content, the sample of Sn:Zn optimum ratio taken as 1:99 yields 1.5-fold improvement upon to 5–50 ppm NO<sub>2</sub> exposure at 200 °C. We argue that these remarkable changes have matured from both a reducing the intergrain potential barrier down to 0.58 eV and increasing the concentration of anionic vacancies at this rational composite. The results demonstrate that solid-phase low-temperature pyrolysis is a powerful technique for adjusting the functional gas-sensing properties of hetero-oxide film via modifying the ratio of the oxide components. |
| first_indexed | 2024-03-10T10:52:41Z |
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| id | doaj.art-7319eddc5b684fe983336389c6a393a4 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-10T10:52:41Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-7319eddc5b684fe983336389c6a393a42023-11-21T22:07:50ZengMDPI AGChemosensors2227-90402021-05-019612410.3390/chemosensors9060124Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin FilmsVictor V. Petrov0Victor V. Sysoev1Aleksandra P. Starnikova2Maria G. Volkova3Zamir Kh. Kalazhokov4Viktoriya Yu. Storozhenko5Soslan A. Khubezhov6Ekaterina M. Bayan7Institute of Nanotechnologies, Electronics, and Equipment Engineering, Southern Federal University, 347928 Taganrog, RussiaDepartment of Physics, Yuri Gagarin State Technical University of Saratov, 410054 Saratov, RussiaInstitute of Nanotechnologies, Electronics, and Equipment Engineering, Southern Federal University, 347928 Taganrog, RussiaDepartment of Chemistry, Southern Federal University, 344090 Rostov-on-Don, RussiaInstitute of Physics and Mathematics, Kabardino-Balkarian State University, n.a. Kh.M. Berbekov, 360004 Nalchik, RussiaDepartment of Chemistry, Southern Federal University, 344090 Rostov-on-Don, RussiaDepartment of Physics, North-Ossetian State University, 362025 Vladikavkaz, RussiaDepartment of Chemistry, Southern Federal University, 344090 Rostov-on-Don, RussiaThin nanocomposite films composed of ZnO and SnO<sub>2</sub> at 0.5–5 mol.% concentrations were synthesized by a new solid-phase low-temperature pyrolysis under the developed protocols. This hetero-oxide material was thoroughly studied by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) techniques to be compared with electrical and gas-sensing properties. We have found that the films have a poly-nanocrystal structure of ZnO and SnO<sub>2</sub> crystals with characteristic grain sizes at 10–15 nm range. When comparing the chemiresistive response of the films with varied tin dioxide content, the sample of Sn:Zn optimum ratio taken as 1:99 yields 1.5-fold improvement upon to 5–50 ppm NO<sub>2</sub> exposure at 200 °C. We argue that these remarkable changes have matured from both a reducing the intergrain potential barrier down to 0.58 eV and increasing the concentration of anionic vacancies at this rational composite. The results demonstrate that solid-phase low-temperature pyrolysis is a powerful technique for adjusting the functional gas-sensing properties of hetero-oxide film via modifying the ratio of the oxide components.https://www.mdpi.com/2227-9040/9/6/124ZnOSnO<sub>2</sub>nanocomposite thin filmelectrophysical propertiesgas sensorNO<sub>2</sub> |
| spellingShingle | Victor V. Petrov Victor V. Sysoev Aleksandra P. Starnikova Maria G. Volkova Zamir Kh. Kalazhokov Viktoriya Yu. Storozhenko Soslan A. Khubezhov Ekaterina M. Bayan Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films Chemosensors ZnO SnO<sub>2</sub> nanocomposite thin film electrophysical properties gas sensor NO<sub>2</sub> |
| title | Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films |
| title_full | Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films |
| title_fullStr | Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films |
| title_full_unstemmed | Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films |
| title_short | Synthesis, Characterization and Gas Sensing Study of ZnO-SnO<sub>2</sub> Nanocomposite Thin Films |
| title_sort | synthesis characterization and gas sensing study of zno sno sub 2 sub nanocomposite thin films |
| topic | ZnO SnO<sub>2</sub> nanocomposite thin film electrophysical properties gas sensor NO<sub>2</sub> |
| url | https://www.mdpi.com/2227-9040/9/6/124 |
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