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Journal of Materials Science: Materials in Electronics
Erschienen in: Journal of Materials Science: Materials in Electronics 3/2020

04.01.2020

A Eu3+-decorated α-Fe2O3 microflower composite film as a fast-response, low-temperature, and sensitive acetone sensor

verfasst von: Jianxia Zhang, Haiying Li, Yu Li, Bing Zhao, Xiangnan Ju, Wenbin Chen, Bingliang Lu, Xiangan Zeng, Li Liu

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 3/2020

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Abstract

This paper reports the preparation of an excellent acetone gas-sensitive material consisting of a Eu3+-decorated α-Fe2O3 microflower (EFM) composite film by a simple hydrothermal and calcination method. For comparison, pure α-Fe2O3 microflowers (PFM) are prepared with the same method. Scanning electron microscopy (SEM) images show that the samples are a loose 3D flower-like structure with many voids surrounded by many thin nanosheets. The structure of the samples was investigated using X-ray diffraction and X-ray photoelectron spectroscopy (XPS). The PFM and EFM gas sensors were systematically tested for gas sensitivity at an optimum temperature of 145 °C. The sensitivity of the EFM gas sensor with 50 ppm of acetone gas was 83, which was up to four times that of the PFM sensitivity (19). The EFM sensor had an extremely fast response time (4 s) and recovery time (38 s). Moreover, the minimum concentration of acetone that we could detect was 0.1 ppm with a response value of 2.1. The enhancement of gas sensitivity was attributed to the high catalytic activity of the Eu3+ additive.
Vorheriger Artikel Strontium titanate with inverse opal structure as the photocatalysts
Nächster Artikel Nano-SiO2@PMMA-doped composite polymer PVDF-HFP/PMMA/PEO electrolyte for lithium metal batteries

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Metadaten
Titel
A Eu3+-decorated α-Fe2O3 microflower composite film as a fast-response, low-temperature, and sensitive acetone sensor
verfasst von
Jianxia Zhang
Haiying Li
Yu Li
Bing Zhao
Xiangnan Ju
Wenbin Chen
Bingliang Lu
Xiangan Zeng
Li Liu
Publikationsdatum
04.01.2020
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 3/2020
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-019-02810-y

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