X射线光电子能谱
煅烧
材料科学
透射电子显微镜
扫描电子显微镜
兴奋剂
甲烷
纳米技术
化学工程
纳米颗粒
分析化学(期刊)
催化作用
化学
光电子学
复合材料
色谱法
生物化学
工程类
有机化学
作者
Yan Wang,Xueya Sun,Jianliang Cao
标识
DOI:10.1016/j.jallcom.2021.162557
摘要
In2O3 and Ag/In2O3 with diverse doping content were synthesized by a solvothermal method and the subsequent calcination process. Some characterizing methods were used to ensure the obtained materials including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Such analysis indicated that all materials were synthesized successfully and mostly as-synthesized materials are formed with the diameter of 300–450 nm. A contrastive study for CH4 gas sensing performance of pure In2O3 and. Ag/In2O3 was carried out. The sensor test showed that, a high performance based on Ag-doping In2O3 microspheres toward CH4 was obtained. Especially, the 6%-Ag/In2O3 based sensor can detect 500 ppm CH4 with a high response of 27.46, which is about two times of pure In2O3 sensor. The sensors sensitized by Ag possessed a low operation temperature, a better selectivity, even could detect CH4 in a wide concentration range. The possible mechanism such as chemical sensitization and electronic sensitization of Ag nanoparticles was discussed. The 6%-Ag/In2O3 composite exhibited a superior detection performance, which is promising for a real-time CH4 sensor.
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