A facile one-step hydrothermal synthesis of NiO/ZnO heterojunction microflowers for the enhanced formaldehyde sensing properties
作者： Xiaoguang San , Ming Li , Dongyu Liu , Guosheng Wang , Yanbai Shen
DOI: 10.1016/J.JALLCOM.2017.12.168
关键词:
摘要: Abstract NiO/ZnO heterojunction microflowers were successfully synthesized by using a facile one-step hydrothermal process followed calcination. The structural features mainly characterized X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission (TEM) and photoelectron spectroscopy (XPS). It is found that the obtained products showed flower-like structures assembled number of ZnO porous nanosheets, which retained after introducing NiO. formaldehyde gas sensing properties systematically investigated between pure microflowers. microflower sensor exhibited enhanced response lower operating temperature compared to one. Especially, 3 mol% highest responses with others at relatively 200 °C. In addition, fast recovery, good reproducibility stability, selectivity also obtained, indicating formation in favor improving properties. Meanwhile, enhancement mechanism was discussed, related hetrojunction interface high catalytic activity
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