Song Zhilong, Fang Weihao, Zhu Bingchen, Yan Jia
Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Anal Methods. 2024 Sep 12;16(35):5954-5958. doi: 10.1039/d4ay00988f.
Detecting H at low concentrations is important due to it being a major safety concern in practical applications. However, semiconductor chemiresistive gas sensors always suffer from high operating temperatures and power consumption, as well as a limited concentration detection range, which restricts their widespread use. Herein, we developed a 3D nanostructured gas sensor employing a Pd-nanocluster-decorated SnO nanotube array as the sensing layer. The sensor showed sensitive and selective properties for detecting low concentrations of H at room temperature, with a low limit of detection of 1.6 ppb. It also showed good long-term stability, as long as 100 days. Moreover, systematical characterizations were performed in conjunction with density functional theory (DFT) calculations to determine the ability of Pd/SnO junctions to improve the gas-sensing properties. The engineering of the nano-Schottky junction allows us to expand the library for designing low-power-consumption H sensors for widespread applications.
在实际应用中，由于氢气是主要的安全隐患，因此检测低浓度氢气非常重要。然而，半导体化学电阻式气体传感器一直存在工作温度高、功耗大以及浓度检测范围有限等问题，这限制了它们的广泛应用。在此，我们开发了一种三维纳米结构气体传感器，采用钯纳米簇修饰的二氧化锡纳米管阵列作为传感层。该传感器在室温下对低浓度氢气具有灵敏且选择性的检测特性，检测下限低至1.6 ppb。它还表现出良好的长期稳定性，长达100天。此外，结合密度泛函理论（DFT）计算进行了系统表征，以确定钯/二氧化锡结改善气敏性能的能力。纳米肖特基结的设计使我们能够扩展用于设计低功耗氢气传感器以实现广泛应用的库。
