Premium
Research on Ethanol Sensing Characteristics of Pd/Neck‐Connected‐ZnO Based Chemiresistive Sensors
Author(s) -
Qi Tianjiao,
Sun Jie,
Yang Xi
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202004538
Subject(s) - palladium , doping , hydrothermal circulation , chemisorption , materials science , catalysis , oxygen , ethanol , molecule , ion , chemical engineering , nanotechnology , optoelectronics , chemistry , organic chemistry , engineering
Different amounts of Pd‐doped neck‐connected‐ZnO (NC‐ZnO) gas sensing materials were successfully synthesized by one‐step hydrothermal method. As a gas sensing material, the sensing performance of Pd‐doped NC‐ZnO has been systematically studied. The results show that palladium doping can improve the performance of NC‐ZnO sensors. NC‐ZnO doped with 5 wt % Pd showed the highest response to ethanol at 250 °C with a response of 311 to 50 ppm ethanol. After palladium doping, due to the catalytic effect of Pd, the ratio of oxygen vacancies on the surface of the material to chemisorption oxygen increases, and the reaction between ethanol molecules and oxygen ions is promoted, thereby greatly improving the gas sensitivity of undoped NC‐ZnO. Therefore, palladium‐doped NC‐ZnO should be a promising method for designing and manufacturing high performance gas sensors.