In:
Review of Scientific Instruments, AIP Publishing, Vol. 90, No. 6 ( 2019-06-01)
Abstract:
A potentiometric sulfur dioxide (SO2) gas sensor based on the Li3PO4-Li2SiO3 solid electrolyte thin film was developed. The sensor was based on a galvanic cell O2, SO2, Au, Li2SO4-V2O5|Li3PO4-Li2SiO3|Au, SO2, O2. The Li3PO4-Li2SiO3 thin film was deposited on the Al2O3 substrate by RF magnetron sputtering, and the Au patterns were fabricated as the electrodes. The sensing electrode materials of Li2SO4-V2O5 with different dopants TiO2 and MgO were prepared, and as the ratio of Li2SO4:TiO2 is 1:1 (mol) with 5 wt. % V2O5 and 5 wt. % MgO, the sensor showed relatively good response characteristics to SO2 at 450 °C. Then, the sensor was further tested at the working temperature from 400 °C to 500 °C. The results show that the sensor has good response to SO2 at 400–450 °C, and the sensitivity is 90.15–57.19 mV/dec. The response and recovery times are 20–40 s and 2.5–4 min, respectively, when the gas concentration of SO2 increases from 10 ppm to 100 ppm and then decreases to 10 ppm. At 425 °C, the sensitivity is close to the theoretical values, and the final recovery potential of the sensor is almost consistent with the initial potential.
Type of Medium:
Online Resource
ISSN:
0034-6748
,
1089-7623
Language:
English
Publisher:
AIP Publishing
Publication Date:
2019
detail.hit.zdb_id:
209865-9
detail.hit.zdb_id:
1472905-2
SSG:
11
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