High Sensitivity and Fast Response Acetone Gas Sensor Based on Molybdenum Doped Zinc Oxide Micron Flower
Acetone is a colorless and highly volatile toxic solvent,which is easy to cause poisoning,and it is a serious threat to human life and health,so the study of high sensitivity and rapid response acetone sensor has important practical significance.Pure zinc oxide (ZnO) micron flower structures with different molybdenum (Mo) doping concentrations are prepared by precipitation and calcination methods.Mo-ZnO is used as sensitive material to fabricate acetone gas sensors.The gas sensing results show that the detection perform-ance of Mo-doped ZnO for acetone gas is significantly improved compared with pure ZnO.In particular,the response of Mo3-ZnO gas sensor to 100×10-6 acetone gas at 225℃ is 3 times that of pure ZnO,and it has a fast response recovery time(5 s/5 s),good linearity and low detection limit.These excellent sensing properties come from the fact that the Mo-ZnO nanoparticle microflower structure con-sists of many nanosheets with small holes,where the open 3D space provides a larger specific surface area that can adsorb more gas mol-ecules and produce a high response.
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维普
