Low-Cost and Point-of-Use Sensing Device Based on 2D Diffusion-Controlled Colorimetric Sensing Array for Continuous and Multiplexed Air Pollution Monitoring

IF 7.4 Q1 ENGINEERING, ENVIRONMENTAL ACS ES&T engineering Pub Date : 2024-08-27 DOI:10.1021/acsestengg.4c00416
Jingjing Yu, Wei Ding, Francis Tsow, Chinmay Chandrakant Dixit, Vishal Varun Tipparaju, Erica Forzani, Xiaojun Xian
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Abstract

The development of a low-cost and point-of-use sensing device capable of continuously and simultaneously detecting various air pollutants is essential for enhancing air pollution monitoring in communities and workplaces. This technology would enable real-time monitoring, facilitating prompt interventions to mitigate the impact of air pollution on human health and the environment. Colorimetric gas sensors are often used to detect different air pollutants owing to their high selectivity and sensitivity, low cost, and compact size. Nevertheless, continuous and multiplexed detection of gas with a colorimetric sensor often requires lifetime-extension methods and an expensive, space-demanding, and power-hungry optical imaging system as the signal transducer. To address these challenges, we introduce a fully integrated portable gas sensing device that uses cheap, miniaturized, and power-efficient electronic and sensing components. This device enables continuous and multiplexed monitoring of air pollutants through a two-dimensional (2D) diffusion-controlled colorimetric sensor array. By selecting sensing probes with specific colorimetric chemical reactions for different gas analytes, the 2D sensor array ensures specificity across a range of analytes. The test results demonstrate that our 2D diffusion-based colorimetric sensing device can be used for sensitive, selective, and multiplexed monitoring of different air pollutants (ammonia, carbon monoxide, carbon dioxide, and nitrogen dioxide) in a continuous manner. This device has proven effective in monitoring pollutants released from car exhaust. Our innovative chemical sensing approach has facilitated the creation of a compact, cost-effective, and easily deployable sensing device. This device offers continuous and multiplexed sensing capabilities, making it ideal for air pollution monitoring in communities and workplaces to provide evidence-based environmental data for effective air pollution management strategies.

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基于二维扩散控制比色传感阵列的低成本点用传感设备,用于连续和多重空气污染监测
开发一种能够连续、同时检测各种空气污染物的低成本点用传感设备,对于加强社区和工作场所的空气污染监测至关重要。这项技术将实现实时监测,便于及时采取干预措施,减轻空气污染对人类健康和环境的影响。比色气体传感器具有选择性高、灵敏度高、成本低、体积小等优点,通常用于检测不同的空气污染物。然而,使用比色传感器对气体进行连续和多路复用检测通常需要采用延长寿命的方法,以及昂贵、占用空间大且功耗高的光学成像系统作为信号转换器。为了应对这些挑战,我们推出了一种完全集成的便携式气体传感设备,该设备使用廉价、小型化和高能效的电子和传感元件。该设备通过二维(2D)扩散控制比色传感器阵列实现了对空气污染物的连续和多路复用监测。通过为不同的气体分析物选择具有特定比色化学反应的传感探针,二维传感器阵列确保了对一系列分析物的特异性。测试结果表明,我们基于二维扩散的比色传感装置可用于灵敏、选择性和多路复用地连续监测不同的空气污染物(氨、一氧化碳、二氧化碳和二氧化氮)。事实证明,该装置可有效监测汽车尾气中释放的污染物。我们创新的化学传感方法促进了一种结构紧凑、成本效益高且易于部署的传感装置的诞生。该装置具有连续和多路复用的传感能力,非常适合用于社区和工作场所的空气污染监测,为有效的空气污染管理策略提供基于证据的环境数据。
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来源期刊
ACS ES&T engineering
ACS ES&T engineering ENGINEERING, ENVIRONMENTAL-
CiteScore
8.50
自引率
0.00%
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0
期刊介绍: ACS ES&T Engineering publishes impactful research and review articles across all realms of environmental technology and engineering, employing a rigorous peer-review process. As a specialized journal, it aims to provide an international platform for research and innovation, inviting contributions on materials technologies, processes, data analytics, and engineering systems that can effectively manage, protect, and remediate air, water, and soil quality, as well as treat wastes and recover resources. The journal encourages research that supports informed decision-making within complex engineered systems and is grounded in mechanistic science and analytics, describing intricate environmental engineering systems. It considers papers presenting novel advancements, spanning from laboratory discovery to field-based application. However, case or demonstration studies lacking significant scientific advancements and technological innovations are not within its scope. Contributions containing experimental and/or theoretical methods, rooted in engineering principles and integrated with knowledge from other disciplines, are welcomed.
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