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首页> 外文期刊>Nanotechnology >An evolution from 3D face-centered-cubic ZnSnO _3 nanocubes to 2D orthorhombic ZnSnO _3 nanosheets with excellent gas sensing performance
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An evolution from 3D face-centered-cubic ZnSnO _3 nanocubes to 2D orthorhombic ZnSnO _3 nanosheets with excellent gas sensing performance

机译：从3D面心立方ZnSnO _3纳米立方体到具有优良气体传感性能的2D正交晶状ZnSnO _3纳米片的发展。

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摘要

We have successfully observed the development of three-dimensional (3D) face-centered-cubic ZnSnO _3 into two-dimensional (2D) orthorhombic ZnSnO _3 nanosheets, which is the first observation of 2D ZnSnO _3 nanostructures to date. The synthesis from 3D to 2D nanostructures is realized by the dual-hydrolysis-assisted liquid precipitation reaction and subsequent hydrothermal treatment. The time-dependent morphology indicates the transformation via a dissolution-recrystallization mechanism, accompanied by a further growth process. Furthermore, the 2D ZnSnO _3 nanosheets consist of smaller sized nanoflakes. This further increases the special specific surface area and facilitates their application in gas sensing. The 2D ZnSnO _3 nanosheets exhibit excellent gas sensing properties, especially through their ultra-fast response and recovery. When exposed to ethanol and acetone, the response rate is as fast as 0.26s and 0.18s, respectively, and the concentration limit can reach as low as 50ppb of ethanol. All these results are much better than those reported so far. Our experimental results indicate an efficient approach to realize high-performance gas sensors.
机译：我们已经成功地观察到将三维（3D）面心立方ZnSnO _3变成二维（2D）正交ZnSnO _3纳米片，这是迄今为止对2D ZnSnO _3纳米结构的首次观察。通过双重水解辅助的液相沉淀反应和随后的水热处理，可以实现从3D到2D纳米结构的合成。时间依赖性形态表明通过溶解-重结晶机制的转变，伴随着进一步的生长过程。此外，二维ZnSnO_3纳米片由较小尺寸的纳米片组成。这进一步增加了特殊的比表面积并促进了其在气体传感中的应用。二维ZnSnO _3纳米片表现出出色的气体传感特性，尤其是通过其超快响应和回收率。当暴露于乙醇和丙酮时，响应速度分别高达0.26s和0.18s，并且乙醇的浓度极限可以低至50ppb。所有这些结果都比迄今为止报道的要好得多。我们的实验结果表明了一种实现高性能气体传感器的有效方法。

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