PDF(Pubmed)
Abstract：
ZnO/Fe2O3 nanocomposites with different concentration and thickness of the Fe2O3 layer were obtained by two-stage aerosol vapor deposition (AACVD). It was shown that the ZnO particles have a wurtzite structure with an average size of 51-66 nm, and the iron oxide particles on the ZnO surface have a hematite structure and an average size of 23-28 nm. According to EDX data, the iron content in the films was found to be 1.3-5.8 at.%. The optical properties of the obtained films were studied, and the optical band gap was found to be 3.16-3.26 eV. Gas-sensitive properties at 150-300 °C were studied using a wide group of analyte gases: CO, NH3, H2, CH4, C6H6, ethanol, acetone, and NO2. A high response to 100 ppm acetone and ethanol at 225-300 °C and a high and selective response to 300-2000 ppb NO2 at 175 °C were established. The effect of humidity on the magnitude and shape of the signal obtained upon NO2 detection was studied.
摘要：
通过两阶段气溶胶气相沉积（AACVD）获得了具有不同浓度和厚度的Fe2O3层的ZnO/Fe2O3纳米复合材料。结果表明，ZnO颗粒具有纤锌矿结构，平均尺寸为51-66nm，ZnO表面的氧化铁颗粒具有赤铁矿结构，平均粒径为23-28nm。根据EDX数据,发现薄膜中的铁含量为1.3-5.8at。%.研究了所得薄膜的光学性能，光学带隙为3.16-3.26eV。使用多种分析物气体研究了150-300°C的气敏特性：CO，NH3，H2，CH4，C6H6，乙醇，丙酮,和NO2。建立了在225-300°C下对100ppm丙酮和乙醇的高响应以及在175°C下对300-2000ppbNO2的高选择性响应。研究了湿度对NO2检测获得的信号的大小和形状的影响。
