Single-Phase Spinel High-Entropy (FeCoNiCrMn)3O4 Synthesized Using Electrospinning Technique and Its Application in the Sensing of Trimethylamine Gas at Room Temperature.

IF 9.1 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2025-10-07 DOI:10.1021/acssensors.5c02540

Jie Huo,Bosen Zhang,Hongli Zhu,Huiyu Lu,Jiarui Qi,Xinyu Meng,Shuangming Wang,Jing Cao,Longlong Fan

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引用次数: 0

Abstract

High-entropy engineering strategies have achieved success in enhancing energy storage and catalytic performances but are rarely reported to improve gas-sensing dynamics, especially for room-temperature gas sensing. Herein, single-phase spinel high-entropy oxide (FeCoNiCrMn)3O4 has been synthesized by electrospinning and authenticated by XRD Rietveld refinement simulation, configuration entropy calculation, and element mapping. For the first time, the as-prepared alkalized high-entropy oxide (FeCoNiCrMn)3O4 shows room-temperature trimethylamine gas-sensing properties, including superior sensing response (113%), high gas selectivity, fast response/recovery speed (11 s/28 s), as well as preferable repeatability and reliability toward 500 ppm of trimethylamine gas. Gas-sensing tests of comparative samples obtained by replacing and reducing metal ions validate that the synergistic effect by Fe, Co, Ni, Cr, and Mn ions enables (FeCoNiCrMn)3O4 to exhibit room-temperature trimethylamine gas sensing, while more lattice distortion, adsorbed oxygen, and oxygen vacancies generated by alkalization treatment further heighten trimethylamine gas adsorption and catalyze surface gas-sensing reactions. The coupling of high entropy and alkalization strategy opens up a new path for improving room-temperature gas sensing.

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静电纺丝技术合成单相尖晶石高熵（FeCoNiCrMn）3O4及其在室温三甲胺气体传感中的应用

高熵工程策略已经在增强储能和催化性能方面取得了成功，但很少有报道称可以改善气敏动力学，特别是室温气敏。本文采用静电纺丝法合成了单相尖晶石高熵氧化物（FeCoNiCrMn）3O4，并通过XRD Rietveld细化模拟、构型熵计算和元素映射进行了验证。制备的碱化高熵氧化物（FeCoNiCrMn）3O4首次表现出室温三甲胺气敏特性，包括优异的传感响应（113%），高气体选择性，快速的响应/回收速度（11 s/28 s），以及对500ppm三甲胺气体具有良好的重复性和可靠性。替换和还原金属离子获得的对比样品气敏实验验证了Fe、Co、Ni、Cr和Mn离子的协同作用使（FeCoNiCrMn）3O4表现出室温三甲胺气敏，而碱化处理产生的更多晶格畸变、吸附氧和氧空位进一步增强了三甲胺气体的吸附，催化了表面气敏反应。高熵与碱化策略的耦合为改进室温气体传感开辟了一条新的途径。

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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.