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Special nanostructure control of ethanol sensing characteristics based on Au@In2O3 sensor with good selectivity and rapid response

机译:基于Au @ In2O3传感器的乙醇传感特性的特殊纳米结构控制,具有良好的选择性和快速响应

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摘要

A unique Au@In2O3 core-shell nanostructure was firstly prepared through a simple sol-gel method, the structure and morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX). The results showed that unique architectures were core-shell nanostructure assembled from an Au core and an In2O3 shell. The gas sensing properties of the as-prepared pure In2O3 and Au@In2O3 core-shell samples were tested toward various gases. The sensor based on a Au@In2O3 core-shell nanostructure showed excellent selectivity toward ethanol at the operating temperature of 160 degrees C, giving a response of about 36.14 to 100 ppm, which was about 1.5 times higher than that of the sensor based on pure In2O3. The tau(res) and the tau(rec) values of the Au@In2O3 sensor to 100 ppm ethanol were 4 s and 2 s respectively, while those of the pure In2O3 sensor were relatively long. The enhancement might be attributed to the unique core-shell structure and existence of a Schottky junction between Au/In2O3.
机译:首先通过简单的溶胶-凝胶法制备了独特的Au @ In2O3核壳纳米结构,并通过X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM)和能量表征了其结构和形貌。 -色散X射线光谱法(EDX)。结果表明,独特的结构是由Au核和In2O3核组装而成的核-壳纳米结构。测试了所制备的纯In2O3和Au @ In2O3核壳样品对各种气体的气敏特性。基于Au @ In2O3核-壳纳米结构的传感器在160摄氏度的工作温度下对乙醇具有出色的选择性,响应约为36.14至100 ppm,这是基于纯金的传感器的约1.5倍In2O3。 Au @ In2O3传感器对100 ppm乙醇的tau(res)和tau(rec)值分别为4 s和2 s,而纯In2O3传感器的tau(res)和long相对较长。这种增强可能归因于独特的核-壳结构以及Au / In2O3之间存在肖特基结。

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