Calcination-temperature-dependent gas-sensing properties of mesoporous nickel oxides nanowires as ethanol sensors
作者： Xiaoqing Li , Danping Li , Jingcai Xu , Hongxiao Jin , Dingfeng Jin
DOI: 10.1016/J.POWTEC.2017.05.020
关键词: Crystallization 、 Microstructure 、 Nanowire 、 Desorption 、 Non-blocking I/O 、 Specific surface area 、 Calcination 、 Inorganic chemistry 、 Materials science 、 Mesoporous material
摘要: Abstract In this paper, the mesoporous NiO nanowires (NWs) were synthesized by using SBA-15 silica as hard templates with nanocasting method, and then calcined from 550 to 750 °C. X-ray diffraction, transmission electron microscopy (TEM), nitrogen adsorption/desorption isotherm UV-vis spectrum used characterize morphology, phase structure microstructure of as-prepared samples. All results indicated that calcination temperature greatly affected crystallization degree specific surface area NWs. And increased decreased temperature. The higher created more active sites for redox reaction, while led wider bandgap made charge carriers transport easily. It was concluded NWs gas-sensing performance. optimized behavior NWs-650 based sensor exhibited highest sensitivity ethanol suitable Furthermore, a better selectivity than n-hexane, methanol, acetone formaldehyde.
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