Highly dispersed CeO2 nanocubics supported on hydrogen substituted graphyne sheets for highly NH3 gas sensing detection and humidity independent at room temperature

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2024-11-18 DOI:10.1016/j.snb.2024.136972

Chuantao Zhang, Lingmin Yu, Senlin Li, Lei Cao, Ning Nan, Rushun Xue, Man Gong, Yaxuan Zhang, Hao Zhang, Xuefeng Xiao, Shanglin Yang, Xinhui Fan, Peichang Shi

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引用次数: 0

Abstract

NH₃ is a fairly important raw material in a number of fields but harmful to the human. Currently, hydrogen substituted graphyne (HsGY) shows fast response to NH₃ gas based on our previous report. However, it still suffers from low response values and humidity interference. CeO₂ has the advantage of moisture resistance as NH₃ gas sensor but prone to agglomeration, whereas the alkyne bond of HsGY can anchor CeO₂ to form a discretely distributed CeO₂. Therefore, highly dispersed CeO₂ nanocubics anchoring on HsGY sheets are synthesized through hydrothermal method. The gas sensing characteristics show that the gas sensing response value to 80 ppm NH₃ is increased by 3 times compared to pure HsGY. Furthermore, they present relatively stable NH₃ gas response under relative humidity variation (20–80 %). In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) is used to reveal the gas sensing mechanism. Energy bands are analyzed using ultraviolet photoemission spectroscopy (UPS), revealing the improvement mechanism of NH₃ gas-sensitive performance. Density functional theory (DFT) calculations are employed to explain selectivity mechanism to NH₃ against other interference gases. Our research provides novel gas sensing materials for the development of high-performance, moisture-resistant room temperature NH₃ sensors.

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氢取代石墨烯片上支持的高度分散 CeO2 纳米立方体，用于室温下高度 NH3 气体传感检测且不受湿度影响

NH3 是许多领域相当重要的原材料，但对人体有害。目前，根据我们之前的报告，氢替代石墨烯（HsGY）对 NH3 气体的响应速度很快。然而，它仍然存在响应值低和湿度干扰的问题。CeO2 作为 NH3 气体传感器具有防潮的优点，但容易团聚，而 HsGY 的炔键可以锚定 CeO2，形成离散分布的 CeO2。因此，通过水热法合成了锚定在 HsGY 片材上的高度分散的 CeO2 纳米立方体。气体感应特性表明，与纯 HsGY 相比，对 80 ppm NH3 的气体感应响应值提高了 3 倍。此外，在相对湿度变化（20%-80%）的情况下，它们对 NH3 气体的响应也相对稳定。原位漫反射红外傅立叶变换光谱（DRIFTS）用于揭示气体感应机制。利用紫外光发射光谱（UPS）分析能带，揭示了 NH3 气敏性能的改进机制。利用密度泛函理论（DFT）计算解释了 NH3 对其他干扰气体的选择性机制。我们的研究为开发高性能、耐潮湿的室温 NH3 传感器提供了新型气体传感材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.