Fabrication and gas sensing properties of Au-loaded SnO2 composite nanoparticles for low concentration hydrogen

作者：Yin, Xi-Tao^*; Tao, Lin

来源：Journal of Alloys and Compounds, 2017, 727: 254-259.

DOI：10.1016/j.jallcom.2017.08.122

• H-2
• Sensor
• Response time
• Sensitivity

Pure and Au-loaded SnO2 are synthesized by the method of sol-gel. XRD, SEM, XPS and electrochemical workstation are used to characterize the crystal structure, surface morphology, chemical composition and electrochemical property of the material, respectively. The effect of operating temperature and Au loading on n value is studied. It is shown that the response time of Au-loaded SnO2 sensor to 2000 ppm H-2 is 43 s at 200 degrees C, which is much shorter than that of pure SnO2 sensor. It is found that the Au-loaded SnO2 sensor can detect H-2 down to 1 ppm. Meanwhile, the Au-loaded SnO2 selectivity to H-2 against CO is given. In conclusion, the Au-loaded SnO2 sensor is a good candidate for practical H-2 sensors.

• 出版日期2017-12-15
• 单位辽宁科技大学