YANG Jiaxuan, YAN Yong, LIANG Meihua, et al. Preparation of oxygen vacancy-rich Pt/ZnO-based MEMS chips and research on ethanol sensing performance[J]. 2026, 45(3): 31-35.
YANG Jiaxuan, YAN Yong, LIANG Meihua, et al. Preparation of oxygen vacancy-rich Pt/ZnO-based MEMS chips and research on ethanol sensing performance[J]. 2026, 45(3): 31-35.DOI:
and platinum(Pt)/ZnO composite material with oxygen vacancy-rich and highly dispersed Pt nanoparticles is prepared using the impregnation-photodeposition method.Based on this
MEMS ethanol gas sensor is fabricated.The results indicate that the loading of Pt significantly improves the sensitivity of the ZnO/MEMS sensor.At 220℃
the response time of 1.0% Pt/ZnO toward ethanol gas with a volume fraction of 20×10
-6
is only 1.6s and the response value can reach 21.4
which is 15 times that of the ZnO sensor unloaded Pt nanoparticles.At the same time
the loading of Pt reduces the optimal oper
ating temperature of the sensor by 60℃
thereby decreasing the power consumption of the sensor.Furthermore
the 1.0% Pt/ZnO sensor has excellent selectivity and stability for ethanol
exhibiting a good linear response relationship to ethanol gas with different volume fractions.