Gas-Sensing Activity of Amorphous Copper Oxide Porous Nanosheets.,ChemistryOpen

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Gas-Sensing Activity of Amorphous Copper Oxide Porous Nanosheets.
ChemistryOpen ( IF 2.5 ) Pub Date : 2020-01-17 , DOI: 10.1002/open.201900327
Zheng Tian _{1,

2} , Hua Bai ₂ , Yahui Li ₂ , Wei Liu ₂ , Junfang Li ₂ , Qinghong Kong ₁ , Guangcheng Xi ₂

Affiliation

In this paper, the gas‐sensing properties of copper oxide porous nanosheets in amorphous and highly crystalline states were comparatively investigated on the premise of almost the same specific surface area, morphology and size. Unexpectedly, the results show that amorphous copper oxide porous nanosheets have much better gas sensing properties than highly crystalline copper oxide to a serious of volatile organic compounds, and the lowest detection limit (LOD) of the amorphous copper oxide porous nanosheets to methanal is even up to 10 ppb. By contrast, the LOD of the highly crystalline copper oxide porous nanosheets to methanal is 95 ppb. Experiments prove that the oxygen vacancies contained in the amorphous copper oxide porous nanosheets play a key role in improving gas sensitivity, which greatly improve the chemical activity of the materials, especially for the adsorption of molecules containing oxygen‐groups such as methanal and oxygen.

中文翻译：

非晶氧化铜多孔纳米片的气体传感活性。

本文在几乎相同的比表面积，形态和尺寸的前提下，比较研究了非晶态和高度结晶态的氧化铜多孔纳米片的气敏特性。出乎意料的是，结果表明，非晶态氧化铜多孔纳米片对大量挥发性有机化合物具有比高结晶度氧化铜更好的气体传感性能，并且非晶态氧化铜多孔纳米片对甲烷的最低检测限（LOD）甚至更高至10 ppb。相比之下，高结晶度氧化铜多孔纳米片的甲烷检出限为95 ppb。实验证明，无定形氧化铜多孔纳米片中的氧空位在提高气体敏感性方面起着关键作用，从而极大地提高了材料的化学活性，

更新日期：2020-01-17

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