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A mesoporous Ni3N/NiO composite with a core–shell structure for room temperature, selective and sensitive NO2 gas sensing

机译:具有室温,选择性和敏感的NO2气体感应的核心镍氢镍锂结构,具有核心壳结构

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A highly crystallized mesoporous Ni _(3) N with core–shell structure was prepared from a green and template free method. The Ni _(3) N was characterized by using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area analysis, and the measured Ni _(3) N has a specific surface area of 85.89 m ~(2) g ~(?1) and a narrow pore size distribution centered at 5 nm. After air oxidization, the Ni _(3) N/NiO composite was further evaluated for NO _(2) gas sensing at room temperature, and the Ni _(3) N/NiO-based sensor exhibited excellent selectivity for NO _(2) gas. A good linear relationship between the sensor response and the NO _(2) gas concentrations was observed. The enhanced NO _(2) sensing performance can be attributed to the highly crystallized mesoporous and core–shell structures of the synthesized Ni _(3) N/NiO.
机译:具有核 - 壳结构的高度结晶的介孔Ni _(3)n由绿色和模板自由方法制备。通过使用粉末X射线衍射(PXRD),扫描电子显微镜(SEM),Brunauer-Emmett-Teller(Bet)表面积分析,以及测量的Ni _(3)n具有一个比表面积为85.89m〜(2)g〜(α1)和以5nm为中心的窄孔径分布。在空气氧化之后,进一步评价NI _(3)N / NIO复合物在室温下进行NO _(2)气体感测,并且Ni _(3)基于N / NIO的传感器对NO _表现出优异的选择性(2 ) 气体。观察到传感器响应和NO _(2)气体浓度之间的良好线性关系。增强型No _(2)感测性能可归因于合成的Ni _(3)N / NiO的高度结晶的中孔和核心壳结构。

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