Enhanced Gas Adsorption and Robust Multi-Interface Charge Transfer in Ternary Co3O4/ZnIn2S4/Pt Heterostructure Arrays for Efficient Triethylamine Detection.

IF 8.2 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2025-05-19 DOI:10.1021/acssensors.5c00818

Yulin Zhu,Yan Liang,Jianxian You,Dehua Wang,Jiahao Li,Yanxing Yang,Yong Yang

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引用次数: 0

Abstract

The resistive gas sensors based on semiconductor materials provide an effective strategy for the detection of harmful gases. However, the limitations of surface gas adsorption activity and interface charge transfer efficiency of semiconductor sensing materials, as well as the complex device fabrication process, pose significant challenges to the development of sensors. Here, a ternary Co3O4/ZnIn2S4/Pt heterostructure arrays gas sensor is designed, which consists of Co3O4 nanowire arrays grown in situ on an alumina flat substrate as backbones, ultrathin ZnIn2S4 nanosheets wrapped around the surface of Co3O4 nanowires, and highly dispersed Pt nanoparticles on the outermost layer. It enables superior sensing performance for the detection of the volatile organic compound triethylamine, which exhibits a significant response of ∼118.97 (Ra/Rg) toward 100 ppm of triethylamine at a relatively low working temperature of 200 °C, along with excellent response/recovery speed, selectivity, and enduring stability (over 3 months). Based on first-principles calculation and a series of spectroscopic characterization (including in situ spectroscopy), it is revealed that the heterostructure arrays exhibited enhanced adsorption activity for both oxygen and triethylamine molecules. Most importantly, the robust p-n heterointerface (Co3O4/ZnIn2S4) and semiconductor-metal heterointerface (Co3O4/Pt, ZnIn2S4/Pt) are formed in the ternary heterostructure, achieving efficient multi-interface charge transfer characteristics. In addition, thanks to the design of in situ 1D/2D/0D porous array structures, the ternary Co3O4/ZnIn2S4/Pt heterostructure arrays not only have large specific surface areas for gas reaction but also simplify device manufacturing. This research offers novel perspectives on boosting the gas sensing performance of semiconductor materials through the comprehensive design of ternary heterostructures with robust multi-interfaces.

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Co3O4/ZnIn2S4/Pt三元异质结构阵列增强气体吸附和稳健的多界面电荷转移用于高效检测三乙胺。

基于半导体材料的电阻式气体传感器为有害气体的检测提供了一种有效的策略。然而，半导体传感材料的表面气体吸附活性和界面电荷转移效率的限制，以及复杂的器件制造工艺，给传感器的发展带来了重大挑战。本文设计了一种Co3O4/ZnIn2S4/Pt三元异质结构阵列气体传感器，该传感器由在氧化铝平面衬底上原位生长的Co3O4纳米线阵列作为骨架，超薄的ZnIn2S4纳米片包裹在Co3O4纳米线表面，最外层是高度分散的Pt纳米颗粒。它为挥发性有机化合物三乙胺的检测提供了优越的传感性能，在200°C的相对较低工作温度下，对100 ppm的三乙胺表现出显著的响应~ 118.97 (Ra/Rg)，以及出色的响应/恢复速度，选择性和持久稳定性（超过3个月）。基于第一性原理计算和一系列光谱表征（包括原位光谱），揭示了异质结构阵列对氧和三乙胺分子的吸附活性增强。最重要的是，在三元异质结构中形成了坚固的p-n异质界面（Co3O4/ZnIn2S4）和半导体-金属异质界面（Co3O4/Pt, ZnIn2S4/Pt），实现了高效的多界面电荷转移特性。此外，由于原位1D/2D/0D多孔阵列结构的设计，Co3O4/ZnIn2S4/Pt三元异质结构阵列不仅具有较大的气体反应比表面积，而且简化了器件制造。本研究为通过具有鲁棒多界面的三元异质结构的综合设计来提高半导体材料的气敏性能提供了新的视角。

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来源期刊

ACS Sensors Chemical Engineering-Bioengineering

CiteScore

14.50

自引率

3.40%

发文量

372

期刊介绍： ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.