文献类型：期刊文献

英文题名：Ethanol Gas Sensor Based on γ-Fe2O3 Nanoparticles Working at Room Temperature with High Sensitivity

作者：Hou Lin[1,2];Zhang Chun-Mei[2,4];Ma Peng[3];Li Lei[2,5];Zhu Ka-Ke[3];Kang Xiao-Feng[1];Chen Wei[2]

机构：[1]Northwest Univ, Coll Chem & Mat Sci, Xian 710069, Shaanxi, Peoples R China;[2]Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100039, Peoples R China;[5]Changchun Univ Technol, Coll Elect & Elect Engn, Changchun 130012, Jilin, Peoples R China

年份：2018

卷号：46

期号：7

起止页码：E1854

外文期刊名：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY

收录：;EI(收录号：20182805527677);WOS:【SCI-EXPANDED(收录号:WOS:000438470300002)】；

基金：This work was supported by the National Key Research and Development Plan of China (No. 2016YFA0203200), the National Natural Science Foundation of China (Nos. 21575134, 21633008, 21773224) and the K.C. Wong Education Foundation.

语种：英文

外文关键词：gamma-Fe2O3; Ethanol; Gas sensor; Metal oxide; Room temperature; Semiconductor

摘要：Improving the sensing sensitivity and lowering the working temperature are the critical issues for the practical application of gas sensors. For a gas sensor, the sensing materials play important roles in determining the sensing properties. In the present work, gamma-Fe2O3 microspheres composed of nanoparticles were successfully fabricated by a typical facile hydrothermal process and a following annealing treatment. Interestingly, the as-synthesized gamma-Fe2O3 microspheres showed excellent sensing properties for the detection of ethanol gas with high sensitivity, and especially working temperature as low as room temperature. The gas sensing results showed that at the optimal operating temperature (200 degrees C), the response intensity of gamma-Fe2O3 microspheres for 1000 ppm ethanol gas could reach 74.6 and the limit of detection (LOD) was about 0.026 ppm. At room temperature, the gamma-Fe2O3 microspheres still demonstrated a good response to different concentrations of ethanol gas from 1 to 1000 ppm, with a very good selectivity over other gas species and a good stability. This study indicated that the gamma-Fe2O3 phase could be a type of promising room-temperature gas sensing material for ethanol gas detection.