Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light
Zinc oxide nanoparticles (ZnO NPs) with varying levels of nitrogen (N) doping were synthesized using a straightforward sol–gel approach. The morphology and microstructure of the N-doped ZnO NPs were examined through techniques such as SEM, XRD, photoluminescence, and Raman spectroscopy. The characte...
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MDPI AG
2024-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/1/114 |
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| author | Angelo Ferlazzo Giovanni Neri Andrea Donato Giovanni Gugliandolo Mariangela Latino |
| author_facet | Angelo Ferlazzo Giovanni Neri Andrea Donato Giovanni Gugliandolo Mariangela Latino |
| author_sort | Angelo Ferlazzo |
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| description | Zinc oxide nanoparticles (ZnO NPs) with varying levels of nitrogen (N) doping were synthesized using a straightforward sol–gel approach. The morphology and microstructure of the N-doped ZnO NPs were examined through techniques such as SEM, XRD, photoluminescence, and Raman spectroscopy. The characterization revealed visible changes in the morphology and microstructure resulting from the incorporation of nitrogen into the ZnO lattice. These N-doped ZnO NPs were used in the fabrication of conductometric gas sensors designed to operate at room temperature (RT) for detecting low concentrations of NO<sub>2</sub> in the air, under LED UV-Vis irradiation (λ = 400 nm). The influence of nitrogen doping on sensor performance was systematically studied. The findings indicate that N-doping effectively enhances ZnO-based sensors’ ability to detect NO<sub>2</sub> at RT, achieving a notable response (S = R/R<sub>0</sub>) of approximately 18 when exposed to 5 ppm of NO<sub>2</sub>. These improvements in gas-sensing capabilities are attributed to the reduction in particle size and the narrowing of the optical band gap. |
| format | Article |
| id | doaj-art-23fb2563c9b54072b9b59fb7e3d9b6c6 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj-art-23fb2563c9b54072b9b59fb7e3d9b6c62025-01-10T13:20:55ZengMDPI AGSensors1424-82202024-12-0125111410.3390/s25010114Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis LightAngelo Ferlazzo0Giovanni Neri1Andrea Donato2Giovanni Gugliandolo3Mariangela Latino4Department of Chemical Sciences, University of Catania, 95125 Catania, ItalyDepartment of Engineering, University of Messina, 98166 Messina, ItalyDepartment of Engineering, Mediterranea University, 89122 Reggio Calabria, ItalyDepartment of Engineering, University of Messina, 98166 Messina, ItalyCNR-IPCF, Institute for Chemical-Physical Processes Messina, 98158 Messina, ItalyZinc oxide nanoparticles (ZnO NPs) with varying levels of nitrogen (N) doping were synthesized using a straightforward sol–gel approach. The morphology and microstructure of the N-doped ZnO NPs were examined through techniques such as SEM, XRD, photoluminescence, and Raman spectroscopy. The characterization revealed visible changes in the morphology and microstructure resulting from the incorporation of nitrogen into the ZnO lattice. These N-doped ZnO NPs were used in the fabrication of conductometric gas sensors designed to operate at room temperature (RT) for detecting low concentrations of NO<sub>2</sub> in the air, under LED UV-Vis irradiation (λ = 400 nm). The influence of nitrogen doping on sensor performance was systematically studied. The findings indicate that N-doping effectively enhances ZnO-based sensors’ ability to detect NO<sub>2</sub> at RT, achieving a notable response (S = R/R<sub>0</sub>) of approximately 18 when exposed to 5 ppm of NO<sub>2</sub>. These improvements in gas-sensing capabilities are attributed to the reduction in particle size and the narrowing of the optical band gap.https://www.mdpi.com/1424-8220/25/1/114sol–gelZnO nanoparticlesN-doped ZnONO<sub>2</sub> gas sensor |
| spellingShingle | Angelo Ferlazzo Giovanni Neri Andrea Donato Giovanni Gugliandolo Mariangela Latino Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light Sensors sol–gel ZnO nanoparticles N-doped ZnO NO<sub>2</sub> gas sensor |
| title | Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light |
| title_full | Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light |
| title_fullStr | Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light |
| title_full_unstemmed | Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light |
| title_short | Room Temperature NO<sub>2</sub>-Sensing Properties of N-Doped ZnO Nanoparticles Activated by UV-Vis Light |
| title_sort | room temperature no sub 2 sub sensing properties of n doped zno nanoparticles activated by uv vis light |
| topic | sol–gel ZnO nanoparticles N-doped ZnO NO<sub>2</sub> gas sensor |
| url | https://www.mdpi.com/1424-8220/25/1/114 |
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