期刊
CERAMICS INTERNATIONAL
卷 48, 期 6, 页码 7405-7440出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.12.123
关键词
Tin dioxide; Gas sensor; SnO2 nanostructures; Surface modification
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- National Council for Scientific and Technological Development CNPq [308822/2018-8, 420004/2018-1]
Gas sensors based on SnO2 nanostructures have been extensively investigated, and the sensing performance of SnO2 can be greatly improved by synthesizing different-dimensional and doped SnO2 nanostructures. Doping and larger surface area are important factors affecting the sensing properties of SnO2.
Gas sensors based on SnO2 nanostructures have been extensively investigated in recent years. Many recent investigations have focused on synthesizing 0D, 1D, 2D and 3D SnO2 nanostructures with high sensing capacity. This work presents a review of the recent developments in pure, doped and metal oxide functionalized SnO2 nanostructured gas sensors, emphasizing the main SnO2 preparation methods and the working principle of SnO2 gas sensors. Most studies have shown that doping, coupled with a high surface area, can significantly improve SnO2 sensing properties. Sensing response, response/recovery times, and operating temperature can be modulated by the synergistic effect between these two factors. In general, fine nanoparticles, mesoporous materials, hollow and 3D nanostructures combined with additives such as Pt, Pd, Cu, Ni, Ag and Al have shown the best improvements in gas sensing.
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