Fe2O3-Co3O4 nanocomposite gas sensor for ethanol sensing studies

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-12-15 DOI:10.1016/j.ceramint.2024.10.138

Seyed Mohammad Hossein Bagherzadeh Enferadi, Ali Mirzaei

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引用次数: 0

Abstract

This study focused on pristine Fe₂O₃, pristine Co₃O₄, and Fe₂O₃-Co₃O₄ composite using the Pechini sol-gel method for ethanol gas sensing applications. Advanced characterization techniques were used to analyze the phase, morphology, and composition of the synthesized materials. Gas sensors were then fabricated and used for ethanol gas sensing at different temperatures. The results indicated that Fe₂O₃-Co₃O₄ composite gas sensor crystallized at 600 °C, had higher response compared to both pristine Fe₂O₃ and pristine Co₃O₄ gas sensors. The composite sensor manifested a high response of 26.2–100 ppm ethanol at 250 °C, while maximum responses of pristine Co₃O₄ gas sensor was only 4.4 at 200 °C and that of pristine Fe₂O₃ sensor was 11.4 at 300 °C. The boosted sensing performance of the composite sensor was related to the formation of p-n heterojunctions between Co₃O₄ and Fe₂O₃ in composite sensor, the formation of dangling bonds at interfaces, and high intrinsic ethanol sensing properties of Fe₂O₃.

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用于乙醇传感研究的 Fe2O3-Co3O4 纳米复合气体传感器

本研究采用 Pechini 溶胶凝胶法，重点研究了用于乙醇气体传感的原始 Fe2O3、原始 Co3O4 和 Fe2O3-Co3O4 复合材料。研究采用了先进的表征技术来分析合成材料的相位、形态和成分。然后制作了气体传感器，并在不同温度下用于乙醇气体传感。结果表明，与原始 Fe2O3 和原始 Co3O4 气体传感器相比，在 600°C 结晶的 Fe2O3-Co3O4 复合气体传感器具有更高的响应。复合传感器在 250°C 时对 100 ppm 乙醇的响应高达 26.2，而原始 Co3O4 气体传感器在 200°C 时的最大响应仅为 4.4，原始 Fe2O3 传感器在 300°C 时的最大响应为 11.4。复合传感器传感性能的提高与复合传感器中 Co3O4 和 Fe2O3 之间形成 p-n 异质结、界面上形成悬空键以及 Fe2O3 固有的高乙醇传感性能有关。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.