Highly Sensitive and Selective Room Temperature NO2 Gas Sensor Based on 3D BiFeO3 − x Microflowers

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Electronic Materials Letters Pub Date : 2024-11-23 DOI:10.1007/s13391-024-00534-8

Wei Wang, Wei Jiang, Lei Zhuang

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Abstract

High-performance chemresistive gas sensors operating at low or room temperatures are of great potential for practical applications. In this work, the oxygen vacancies-rich BiFeO_3 − x microflowers were synthesized using a facile solvothermal route. The characterized results showed that BiFeO_3 − x was assembled with nanosheets, and displayed a diameter of around 1 μm. The as-fabricated BiFeO_3 − x gas sensor exhibited fine sensing properties towards 0.5-5 ppm NO₂ under ~ 23 ^oC, including a response of 2.92 to 5 ppm NO₂, and it also maintained a response of 1.05 towards 50 ppb NO₂. The gas sensor demonstrated a theoretical limit of detection as low as 273 ppb, rapid response/recovery speed (22/69 s), good selectivity, and repeatability. The improved NO₂ sensing mechanism of enriched oxygen vacancies-BiFeO_3 − x was investigated regarding its micro-nano structure and abundant oxygen species.

Graphical Abstract

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.