Journal
VACUUM
Volume 202, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2022.111149in
Keywords
In2O3???????; Microspheres; Porous structure; Ni-doped; CH4 sensors
Funding
- National Natural Science Foundation of China [62173129]
- Program for Science & Technology Innovative Research Team in the University of Henan Province [21IRTSTHN006]
- Natural Science Foundation of Henan Province [212300410042]
- Fundamental Research Funds for the Universities of Henan Province [NSFRF220101]
Ask authors/readers for more resources
This research reported the synthesis of Ni-doped In2O3 microspheres through solvothermal strategy and investigated their composition, structure, and CH4 sensing properties. The results showed that Ni-doped In2O3 microspheres had enhanced response to CH4 at low temperature, good selectivity, and stability.
Improving the methane (CH4) sensing characteristics of metal oxide semiconductors is a vital research issue. Herein, we reported the synthesis of porous Ni-doped In2O3 microspheres through an effective solvothermal strategy. The composition and structure of the as-prepared samples as well as the CH4 sensing properties were systematically characterized and investigated. The results demonstrate that Ni-doped In2O3 microspheres possess suitable pore sizes, small particle sizes and oxygen-enriched defects. Compared to bare In2O3 sensor, the sensor based on 5.0 mol% Ni-doped In2O3 (NIO-5.0) shows enhanced response (72.727) to 200 ppm CH4 at relatively low operating temperature (140 C). Meanwhile, it also displays good selectivity, superior repeatability and long-term stability. The enhanced CH(4-)sensing performance could be mainly attributed to the stable porous structure and the abundant oxygen vacancy defects induced by Ni doping. Significantly, this work provides a great application prospect of Ni-doped In2O3 porous microspheres for low-temperature and high-response CH4 detection.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available