NIU Xin-shu, WANG Xue-li, LI Hua, et al. Effect of Al2O3-La2O3 co-doping on sensing performance of ZnO nanopowder[J]. 2008, 27(11): 15-17. DOI: 10.13873/j.1000-97872008.11.001.
The powders of ZnO and Al or La-doped and Al-La co-doped ZnO are prepared by sol-gel methed.The microstructrure is characterized by XRD and TEM.The gas sensing character of the powders is studied.The result shows the sensors made from Al or La-doped ZnO powders have a high sensitivity and selectivity to volume fraction 0.005% Cl2
but Al-La co-doped ZnO makes the optimal working temperature decline from 290℃to 200℃.
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