期刊
MATERIALS LETTERS
卷 325, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2022.132846
关键词
Nanocomposites; Mesoporous; Sensors; Ethanol
资金
- Shanghai association for the promotion of scientific and technological achievements [LM2018-5]
- project of Shanghai Institute of Technology [XTCX2022-15]
Au-loaded gamma-Fe2O3 nanocomposites were successfully prepared using a simple hydrothermal method and one-step amino acid synthesis. The material exhibited high purity and mesoporous structure. The sensor based on mesoporous Au-loaded gamma-Fe2O3 nanospheres showed superior performance in detecting ethanol, with high response value, short response/recovery times, excellent selectivity, long-term stability, and the ability to detect as low as 0.2 ppm ethanol. This material holds promise for high-performance ethanol detectors.
Au-loaded gamma-Fe2O3 nanocomposites were prepared by a simple hydrothermal method and one-step amino acid synthesis. Through various characterization methods, it was found that the gamma-Fe2O3 nanospheres attached with gold nanoparticles were of high purity and mesoporous. The test results show that compared with pure gamma-Fe2O3, the sensor based on mesoporous Au-loaded gamma-Fe2O3 nanospheres has superior performance, and it exhibits a high response value (S = 56.7) to 100 ppm ethanol at 200celcius, short response/recovery times (2 s/9s), and excellent selectivity and long-term stability. Furthermore, the sensor can detect ethanol as low as 0.2 ppm (S = 2.3). The material is expected to be used for high-performance ethanol detectors.
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