Highly sensitive triethylamine gas sensor by Pt-loaded p–n heterojunction Co<sub>3</sub>O<sub>4</sub>/WO<sub>3</sub>
Zhenlin Song, Jiyang Zeng, Baoye Zi, Fengying Chen, Yumin Zhang, Genlin Zhang, Zhongqi Zhu, Jin Zhang, Qingju Liu
Abstract
Abstract Triethylamine (TEA) exists widely in production and life and is extremely volatile, which seriously endangers human health. It is required to develop high-performance TEA sensors to protect human health. We fabricated Pt-Co 3 O 4 /WO 3 based on our previous work, and the performance was tested against volatile organic compounds. Compared with the previous work, its operating temperature was greatly reduced from 240 °C to 180 °C. The response value of Pt-Co 3 O 4 /WO 3 was increased from 1101 to 1532 for 10 ppm TEA with good selectivity. These results show a significant step toward practical use of the Pt-Co 3 O 4 /WO 3 sensor.