Light-activated room-temperature gas sensors based on metal oxide nanostructures: A review on recent advances
| Autor: | Huchi Shen, Yi Xia, Sridhar Komarneni, Jing Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Fabrication Nanocomposite Nanostructure Materials science Process Chemistry and Technology Light activated Doping Oxide Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Metal chemistry.chemical_compound chemistry visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium 0210 nano-technology Porosity |
| Zdroj: | Ceramics International. 47:7353-7368 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.11.187 |
| Popis: | Many recent efforts are directed toward developing high-performance gas sensors based on metal oxide nanostructures operating at room temperature, as it lowers the power consumption, simplifies the device fabrication as well as improves the safety and stability of the sensors. The light-activated gas sensing technology was intensively studied because of its high effectiveness in improving the gas sensing performance of metal oxide nanostrctures at room temperature. This review is covers comprehensive advances in the emerging and feasible approaches for improving nanostructured metal oxide-based gas sensors by light activation, especially the progresses made in the last five years. We first summarize the effects of light-activation on gas sensing behavior of metal oxide nanostructures with some new insights into the related mechanisms. For enhancing the light-activated gas-sensing performance some possible strategies are then introduced, which include the modification of the size, dimension, nanoarchitecture, porous or hierarchical structure and doping or defect engineering, as well as the construction of nanocomposite sensing materials. Finally, some recent developments in light source and device structure design towards low power gas sensor systems are discussed. We hope that this review would provide some useful information to the design of light-activated metal oxide gas sensors operating at room temperature. |
| Databáze: | OpenAIRE |
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