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首页> 外文期刊>Journal of Materials Science >Architectural tailoring of orthorhombic MoO3 nanostructures toward efficient NO2 gas sensing
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Architectural tailoring of orthorhombic MoO3 nanostructures toward efficient NO2 gas sensing

机译：正交MOO3纳米结构的建筑剪裁到高效NO2气体传感

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In the present study, an architectural tailoring strategy was established to tune crystalline orthorhombic molybdenum trioxide (alpha-MoO3) to obtain nanostructures such as nanorods, dumbbell-shaped nanorods and hierarchical nanodisks for chemiresistive gas sensors. The different types of alpha-MoO3 nanostructures were synthesized by adopting controlled hydrothermal reaction conditions such as reaction time and temperature. The morphological variation of nanostructures revealed changes in crystalline parameters, such as size, micro-strain, shape, surface area, and porosity. The microstructural effects and shape of the alpha-MoO3 nanostructures were studied to determine their influence on the analytical characteristics of a gas sensor, the sensitivity, response time, and selectivity toward NO2 analyte gas. The high surface area of alpha-MoO3 nanorods showed a high sensitivity of 84% at an optimal operating temperature of 110 degrees C, with response and recovery times at 45 and 42 s, respectively, then dumbbell-shaped nanorods is reduced with 10% lower sensitivity than nanorods at 74% at a temperature of 130 degrees C. Nanodisks showed the least response compared to all the synthesized structures. All nanostructures of alpha-MoO3 exhibited good selectivity for the NO2 analytical gas with respect to interfering gases such as CO2, NH3, ethanol, methanol, and acetone and in addition, good stability and reproducibility have been observed.
机译：在本研究中，建立了建筑剪裁策略，以调整结晶正交钼三氧化钼（α-Moo3），以获得用于切削气体传感器的纳米杆，哑铃形纳米棒和分层纳米级纳米结构。通过采用诸如反应时间和温度的受控的水热反应条件，合成不同类型的α-MOO3纳米结构。纳米结构的形态学变化显示晶体参数的变化，例如尺寸，微株，形状，表面积和孔隙率。研究了α-Moo3纳米结构的微观结构效应和形状，以确定它们对NO2分析物气体的气体传感器，灵敏度，响应时间和选择性的分析特性的影响。 α-MOO3纳米棒的高表面积在110℃的最佳工作温度下显示出高84％的高灵敏度，分别在45和42秒处，响应和恢复时间分别在45和42秒，然后哑铃形纳米棒减少10％纳米棒的敏感性在130℃的温度下为74％。纳米D.与所有合成的结构相比，纳米噪声呈现最少的响应。所有纳米结构的α-MOO3对NO 2分析气体的所有纳米结构相对于干扰气体呈现出良好的选择性，例如CO 2，NH 3，乙醇，甲醇和丙酮，并且还观察到良好的稳定性和再现性。

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