Dong-Ke Li, Bing-Yan He, Kun-Quan Chen, Ming-Yu Pi, Yu-Ting Cui, Ding-Ke Zhang. Xylene gas sensing performance of Au nanoparticlesloaded WO3 nanoflowers [J]. Acta Physica Sinica, 2019, 68(19): 198101-1
- Acta Physica Sinica
- Vol. 68, Issue 19, 198101-1 (2019)
Fig. 1. The photos of the gas sensor: (a) Ceramic tube; (b) heating wire; (c) prepared sensor; (d) base; (e) cover.制备气敏传感器的实物图 (a)陶瓷管; (b)加热丝; (c)制备好的传感器; (d)底座; (e)外罩套环
Fig. 2. XRD pattern of pure WO3 and Au-loaded WO3 composites with different content of Au nanoparticles.
纯WO3和不同含量的Au负载的WO3复合体系的XRD图
Fig. 3. SEM (a) low magnification, (b) high magnification, (c) TEM and (d) HRTEM photograph of Au(0.4)/WO3 composites.
复合体系Au(0.4)/WO3的SEM (a)低倍和(b)高倍照片及(c) TEM和(d) HRTEM照片
Fig. 4. (a) W 4f and (b) Au 4f XPS spectra for Au(0.4)/WO3 composites.
复合体系Au(0.4)/WO3的(a) W 4f和(b) Au 4f的X射线光电子能谱
Fig. 5. (a) Response curves of various gas sensors exposed to 50 ppm xylene at different operating temperatures; (b) response curves of various gas sensors to different concentrations of xylene at optimal operating temperatures.(a)在不同操作温度下各个气体传感器对50 ppm二甲苯的的响应曲线; (b)在最佳操作温度时, 各个气体传感器对不同浓度二甲苯的响应曲线
Fig. 6. Dynamic response of Au(0.4)/WO3 and pure WO3 to 50 ppm xylene at 250 ℃.
250 ℃时Au(0.4)/WO3和纯WO3对50 ppm二甲苯的动态感应响应
Fig. 7. (a) Sensitivity of Au(0.4)/WO3 and pure WO3 samples to 50 ppm different gases at 250 ℃; (b) the stability evaluation of Au(0.4)/WO3 to 50 ppm xylene.
(a) Au(0.4)/WO3和纯WO3样品在250 ℃, 50 ppm不同气体中的灵敏度; (b) Au(0.4)/WO3对50 ppm二甲苯的稳定性
Fig. 8. (a) Gas-sensitive mechanism diagram of WO3; (b) the schematic diagram of the energy band in Au/WO3.
(a) WO3对二甲苯的气敏机理图; (b) Au/WO3的能带示意图
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