材料科学
纳米线
乙二醇
草酸盐
热分解
傅里叶变换红外光谱
化学工程
X射线光电子能谱
介孔材料
煅烧
透射电子显微镜
分析化学(期刊)
热重分析
扫描电子显微镜
无机化学
纳米技术
有机化学
复合材料
化学
工程类
催化作用
作者
Yong Jia,Ning Jia,Fang Fang
标识
DOI:10.1016/j.mssp.2020.105650
摘要
This research was performed to study a convenient, surfactant free and reducing approach for the synthesis of ferrous oxalate dihydrate (FeC2O4·2H2O) nanowires with a large aspect ratio using Fe(III) ions as iron source and ethylene glycol (EG) as reducing agent. X-ray diffraction, scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectroscopy, nitrogen adsorption–desorption isotherms, and thermal gravimetric analysis were utilized to reveal the structures. After calcination, mesoporous nanowire-like α-Fe2O3 with a large aspect ratio were prepared, which presents a good gas-sensing characteristics. The sensor response to 100 ppm ethanol was 25.7, combined with very short response and the recovery times at a working temperature of 240 °C. Furthermore, the obtained nanowire-like α-Fe2O3 sensor also exhibited a good long-term stability. The good properties were related the high content of the defect related oxygen species which revealed by the X-ray photoelectron spectroscopy.
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