High performance acetone sensor based on yttria stabilized-zirconia and NiGaxAl2-xO4 (x=0, 0.6, 1 and 1.4) sensing electrode

In this paper, YSZ-based high performance acetone sensor was successfully developed for intelligent medical service, environmental monitoring, and safety production of smart city. New type spinel electrode sensing materials NiGaxAl2-xO4 (x = 0, 0.6, 1 and 1.4) were synthesized by a sol-gel method. Compared to the other sensing electrode materials, NiGa0.6Al1.4O4 had the highest electrochemical catalytic activity to acetone, and the sensor based on NiGa0.6Al1.4O4-SE performed the best sensing performance of -48 mV to 10 ppm acetone. Moreover, the present acetone sensor has a wide detection range of 0.2-1000 ppm, with sensitivity of -45 mV/decade, meeting the field of diabetic non-invasive diagnosis and real-time in-situ environmental monitoring. In addition, the device also performs excellent repeatability, acceptable selectivity, terrific humidity resistance and marvelous long-term stability during continuous measurements over 30 days. Overall, based on its excellent sensing performance, the developed sensor has marvelous application prospects for acetone detection in intelligent medical service, environmental monitoring, and safety production fields of smart city.