Sr-doped LaBaFeO₃ nanoparticles: structural characteristics and application in gas sensing of acetone and ethanol vapors

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Materials Science: Materials in Electronics Pub Date : 2025-09-20 DOI:10.1007/s10854-025-15736-5

Aref Omri, A. Benali, A. Tozri, N. Zaidi, E. Dhahri, Lin Peng, Jiangtao Wu, B. F. O. Costa

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引用次数: 0

Abstract

In this work, a 10% concentration of Sr²⁺ ion is selected to replace Ba²⁺ ones in the La_0.75Ba_0.25FeO₃ (LBFO) compound to enhance their gas sensing properties. The obtained findings suggest that the substitution of such an amount of barium ions does not affect the orthorhombic structure (space group Pnma) but leads to a distortion in the FeO₆ octahedron of the perovskite materials. Meanwhile, the Raman spectroscopy confirms well the distortion of the FeO₆ octahedron. Both LBFO and LBSFO (La_0.75Ba_0.15Sr_0.1FeO₃) compounds present very small values of crystallite and particle size, with a remarkable decrease when introducing Sr²⁺ ions. The studied compounds, with band gap energies around 2.4 eV, are of high utility for photocatalytic applications. Importantly, the La_0.75Ba_0.15Sr_0.1FeO₃ compound shows higher response values toward acetone and ethanol gases even at low gas concentrations (5 ppm). Response and recovery times were calculated and found to be less than 40 and 20 s, respectively.

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sr掺杂LaBaFeO₃纳米粒子：结构特征及其在丙酮和乙醇蒸汽气敏中的应用

在本研究中，选择10%浓度的Sr2+离子取代La0.75Ba0.25FeO3 （LBFO）化合物中的Ba2+离子，以提高其气敏性能。所获得的结果表明，这样数量的钡离子的取代不会影响钙钛矿材料的正交结构（空间群Pnma），但会导致FeO6八面体的畸变。同时，拉曼光谱很好地证实了FeO6八面体的畸变。LBFO和LBSFO （La0.75Ba0.15Sr0.1FeO3）化合物的结晶度和粒径值都很小，当引入Sr2+离子时，其晶粒尺寸显著减小。所研究的化合物带隙能在2.4 eV左右，具有很高的光催化应用价值。重要的是，La0.75Ba0.15Sr0.1FeO3化合物即使在低气体浓度（5ppm）下对丙酮和乙醇气体也有较高的响应值。计算了响应时间和恢复时间，发现响应时间分别小于40秒和20秒。

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来源期刊

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.