Revolutionizing the sensing properties of green carbon dots for monitoring carbon dioxide and carbon monoxide at room temperature

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-06-10 DOI:10.1007/s42823-024-00751-z

Mohd Abdullah Sheikh, R. S. Chandok, Abida Bashir

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Abstract

Complex structure constituting of several layers of heteroatom-doped N-CDs are used as a main sensing film along with aluminum electrodes in conductometric gas sensing system for sensitive and selective monitoring of CO₂ and CO gases diluted with normal air, which are extensively prevalent in the atmosphere primarily due to the industrial revolution, locomotives, and numerous natural phenomena’s and the limit of detection (LOD) turned out to be 400 ppm and 30 ppm, respectively, with 20% relative humidity at 30 °C and pressure 1 (atm) which are good for healthy air quality checks. The sensor performance was satisfactory and bidirectional at ambient room temperature (30 °C) and pressure (1 atm) conditions but the relative humidity (50%) at 30 °C had a detrimental impact on the sensing responses, therefore intermittent heating at 80 °C for several minutes between the sensing responses was provided to the sensing chip or one should use gas filter membranes to block humidity, thereby maintaining its constant performance with great ease and accuracy. The cyclic voltammetry revealed well-defined oxidation and reduction peaks, with excellent stability and reversibility. In a nutshell, heteroatom-doped N-CDs’ nanocomposite material can revolutionize in a better environmental pollution monitoring by sensing gases in an extensively lesser response and recovery times.

Graphical Abstract

Abstract Image

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革新绿色碳点在室温下监测二氧化碳和一氧化碳的传感特性

由多层掺杂杂原子的 N-CD 组成的复杂结构与铝电极一起被用作电导气体传感系统的主要传感薄膜，用于灵敏、选择性地监测稀释于普通空气中的 CO2 和 CO 气体。在环境室温（30 °C）和压力（1 atm）条件下，传感器的性能令人满意且具有双向性，但 30 °C 时的相对湿度（50%）对传感反应有不利影响，因此，在传感反应之间，应在 80 °C 下对传感芯片进行几分钟的间歇加热，或者使用气体过滤膜来阻挡湿度，从而轻松而准确地保持其恒定性能。循环伏安法显示了清晰的氧化峰和还原峰，具有极佳的稳定性和可逆性。总之，掺杂杂原子的 N-CDs 纳米复合材料可以在更短的响应时间和恢复时间内传感气体，为更好地监测环境污染带来革命性的变化。图文摘要

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.