Journal
MATERIALS
Volume 11, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/ma11040492
Keywords
Ag doping; SnO2 nanospheres; synthesis and characterization; H-2 sensing device
Categories
Funding
- National Natural Science Foundation of China [51507144]
- China Postdoctoral Science Foundation [2015M580771, 2016T90832]
- Chongqing Science and Technology Commission (CSTC) [cstc2016jcyjA0400]
- Postdoctoral Science Funded Project of Chongqing [Xm2015016]
- Visiting Scholarship of State Key Laboratory of Power Transmission Equipment & System Security and New Technology [2007DA10512716423]
- Fundamental Research Funds for the Central Universities [XDJK2015B005]
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In this paper, pure and Ag-doped SnO2 nanospheres were synthesized by hydrothermal method and characterized via X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and X-ray photoelectron spectra (XPS), respectively. The gas sensing performance of the pure, 1 at.%, 3 at.%, and 5 at.% Ag-doped SnO2 sensing devices toward hydrogen (H-2) were systematically evaluated. The results indicated that compared with pure SnO2 nanospheres, Ag-doped SnO2 nanospheres could not only decrease the optimum working temperature but also significantly improve H-2 sensing such as higher gas response and faster response-recovery. Among all the samples, the 3 at.% Ag-doped SnO2 showed the highest response 39 to 100 mu L/L H-2 at 300 degrees C. Moreover, its gas sensing mechanism was discussed, and the results will provide reference and theoretical guidance for the development of high-performance SnO2-based H-2 sensing devices.
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