Abstract

ZnO has attracted much attention as an important semiconductor material, since it has a wide band gap (3.4eV), and excellent stability. It has been extensively researched to detect many gases, such as H2, C2H5OH, NH3 and VOC(volatile organic compounds). Herein, we developed a MOF derived ZIF-8 coated ZnO nanorods(ZnO@ZIF) as a precursor by solvethermal route, then calcined at 500 ºC in air, during the process, the exposure facets of ZnO nanorods have changed. The polycrystaline ZnO nanorods shows higher response to 1-5 ppm NO2 at 140ºC compared with single crystal ZnO nanorods. This provides a new etching way to change the surface facets by using ZIF coated and calcined in air.

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