Pt-Sensitized In 2 O 3 Nanotubes for Sensitive Acetone Monitoring

作者：Zhenlin Song, Wei Guan, Jiyang Zeng, Baoye Zi, Dong Xu, Wei Wang, Yumin Zhang, Genlin Zhang, Zhongqi Zhu, Jin Zhang, Qingju Liu · 发表于：ACS Applied Nano Materials · 年份：2022 · DOI：10.1021/acsanm.2c03650 · 被引用次数：39 · 研究领域：Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies、Analytical Chemistry and Sensors

Detecting 1 ppm acetone at high humidity is essential for a noninvasive diabetes diagnosis. Metal oxide gas sensors are a promising technology to achieve high sensitivity acetone monitoring. Here, we fabricated Pt-sensitized In 2 O 3 nanotubes, and the gas-sensing performance was tested against eight gases. The fiber structure contributes to the uniform dispersion of Pt onto the In 2 O 3 . Pt-sensitized In 2 O 3 nanotubes have lower optimal operating temperatures and higher sensitivity and selectivity than those of the In 2 O 3 nanotubes. The 0.75 wt % Pt-In 2 O 3 sensor has the maximum sensitivity (113) to 10 ppm acetone at 300 °C; the response and response time to 1 ppm acetone are 19.9 and 10 s, respectively. The response to 1 ppm acetone still has 9.83 at the relative humidity of 83%. It also has a low limit of detection (8.4 ppb) and good long-term stability (30 days). These results illustrate that Pt-sensitized In 2 O 3 nanotubes have the potential for a noninvasive diabetes diagnosis.