二维sns2敏化In2O3空心球用于ppb级NO2的快速检测

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-01-20 DOI:10.1016/j.jallcom.2025.178738

Duo Sun, Wei Wang, Yizhuo Fan, Yu Chen, Shengping Ruan

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引用次数: 0

摘要

虽然 In2O3 经常被用于气体传感，但其实际应用却因反应时间过长而受到限制。通过将空心与二维结构连接起来，利用溶热法制造出了富含硫空位的 In2O3/SnS2 纳米空心球。这使得气体扩散更快，并防止了敏感元素的聚集。与 In2O3（12 秒/198 秒）相比，In2O3/SnS2 的响应/恢复时间更短（5 秒/129 秒），二氧化氮的检测限也从 100 ppb 降至 50 ppb。此外，通过降低反应所需的活化能和促进界面电荷转移，SnS2 与二氧化氮气体之间的范德华接触效应使敏感材料对 500 ppb 二氧化氮气体的响应值达到 67.4。改进的电子和纳米结构 In2O3/SnS2 传感器在传感能力方面优于 In2O3。它在痕量二氧化氮检测领域具有广泛的应用潜力。

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Two-dimensional SnS2-sensitized In2O3 hollow spheres for rapid detection of ppb-level NO2

Although In₂O₃ is frequently employed in gas sensing, its practical applicability is limited by its very lengthy reaction time. By linking the hollows with the two-dimensional structure, the solvothermal approach was used to create sulfur-rich vacancy In₂O₃/SnS₂ nanohollow spheres. This allowed the gas to diffuse more quickly and prevented the agglomeration of sensitive elements. The response/recovery time of In₂O₃/SnS₂ is shorter (5 s/129 s) than that of In₂O₃ (12 s/198 s), and the NO₂ detection limit is lowered from 100 ppb to a low 50 ppb. Furthermore, by lowering the activation energy needed for the reaction and facilitating interfacial charge transfer, the effect of van der Waals contact between SnS₂ and NO₂ gas produces a response value of 67.4 for NO₂ gas at 500 ppb for the sensitive material. Improved electronic and nanostructured In₂O₃/SnS₂-based sensors outperform In₂O₃ in terms of sensing capabilities. It offers a wide range of potential applications in the realm of trace NO₂ detection.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.