Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130022, P. R. China.
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
ACS Sens. 2024 Apr 26;9(4):2057-2065. doi: 10.1021/acssensors.4c00085. Epub 2024 Mar 29.
The construction of ammonia gas sensors with wide detection ranges is important for exhalation diagnosis and environmental pollution monitoring. To achieve a wide detection range, sensitive materials must possess excellent spatial confinement and large active surfaces to enhance gas adsorption. In this study, an ammonia microwave gas sensor with a wide detection range of 10 ppb-0.55 v/v% at room temperature was fabricated by incorporating hollow multishelled-structured BaTiO (HoMS-BaTiO). The effect of the number of shells and the quantity of the sensitive material on the gas-sensing performance was investigated, and two-layered HoMS-BaTiO demonstrated the best response at high concentrations (0.15-0.55 v/v%). Conversely, single-layered HoMS-BaTiO displayed outstanding performance at low concentrations (10 ppb-0.15 v/v%). The lower the quantity of the sensitive material, the higher the response. This study offers a method for preparing room-temperature ammonia sensors with a wide detection range and reveals the link between the structure and quantity of sensitive materials and gas-sensing performance.
构建具有宽检测范围的氨气传感器对于呼气诊断和环境污染监测非常重要。为了实现宽检测范围，敏感材料必须具有优异的空间限制和大的活性表面，以增强气体吸附。本研究通过引入中空多壳结构的 BaTiO（HoMS-BaTiO），制备了一种室温下检测范围为 10 ppb-0.55 v/v%的宽检测范围的氨气微波气体传感器。研究了壳层数和敏感材料量对气敏性能的影响，发现双层 HoMS-BaTiO 在高浓度（0.15-0.55 v/v%）下表现出最佳响应。相反，单层 HoMS-BaTiO 在低浓度（10 ppb-0.15 v/v%）下表现出出色的性能。敏感材料的量越低，响应越高。本研究提供了一种制备宽检测范围室温氨气传感器的方法，并揭示了敏感材料的结构和量与气敏性能之间的联系。
