Understanding Fundamental Mechanisms in Gas Sensing to Aid Future Design

了解气体传感的基本机制以帮助未来的设计

• 批准号: 2247996
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2247996
• 关键词: Understanding; Fundamental; Mechanisms; Gas; Sensing

Semiconducting Gas Sensors have been studied for over 60 years and are routinely used as early detection systems against life threatening gases such as CO2, CO and CH4. Despite these 60 years of research, the field relies almost entirely on two semiconductor systems, SnO2 and WO3. Compounding this, the fundamental mechanisms that underpin their performance as gas sensors are still not well understood. In this study, we will use a combination of computational chemistry techniques and advanced spectroscopic techniques to provide new insights into the mechanisms occurring on the surface of these semiconductors under operating conditions. We will use these insights to yield design criteria for transforming other semiconducting oxides into efficient gas sensors, ensuring the UK remains world leading in this area.

半导体气体传感器已有60多年的研究历史，通常被用作二氧化碳、一氧化碳和甲烷等威胁生命的气体的早期检测系统。尽管进行了60年的研究，但该领域几乎完全依赖于两个半导体系统，SnO2和WO3。雪上加霜的是，支撑它们作为气体传感器的基本机制仍然没有得到很好的理解。在这项研究中，我们将结合计算化学技术和先进的光谱技术，为这些半导体在运行条件下的表面机理提供新的见解。我们将利用这些见解来制定设计标准，将其他半导体氧化物转化为高效的气体传感器，确保英国在这一领域保持世界领先地位。