Synthesis and enhanced NO2-sensing properties of ZnO-decorated SnO2 microspheres

In this work, ZnO was decorated onto SnO2 microspheres via a facile solvothermal method, and the gas sensing characteristics of the ZnO/SnO2 composites was systematically studied. Results showed that the ZnO/SnO2 composites was highly responsive to NO2, with much lower response to interfering gases such as ethanol and acetone. At the optimum temperature (200 °C), the response of the ZnO/SnO2 composite to 100 ppm NO2 was about 3 times higher than...