Synthesis of MoO3/WO3 composite nanostructures for highly sensitive ethanol and acetone detection

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2016-09-30 DOI:10.1007/s10853-016-0450-2

Yongjiao Sun, Lin Chen, Ying Wang, Zhenting Zhao, Pengwei Li, Wendong Zhang, Yamin Leprince-Wang, Jie Hu

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引用次数: 44

Abstract

In this paper, different contents of molybdenum oxide/tungsten oxide (MoO₃/WO₃) composite nanostructures were synthesized by hydrothermal method. Field emission scanning electron microscopy images revealed that the morphologies of WO₃ nanostructures were significantly influenced by the Mo amount. Furthermore, the introduction strategy of MoO₃ into WO₃ could effectively improve the gas sensing properties. Especially, the sensor based on the 4?mol% MoO₃/WO₃ composite nanostructures exhibited enhanced gas sensing performance, giving a low limit of detection (500?ppb). It shows high responses of 28.5 and 18.2–100?ppm ethanol and acetone at the operating temperature of 320?°C, which were about 2.3 and 1.7 times higher than those of the pure WO₃, respectively. The enhanced sensing properties of MoO₃/WO₃ gas sensor can be attributed to the addition of MoO₃, which has been discussed in relation to the gas sensing mechanism.

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用于乙醇和丙酮高灵敏度检测的MoO3/WO3复合纳米结构的合成

本文采用水热法制备了不同含量的氧化钼/氧化钨(MoO3/WO3)复合纳米结构。场发射扫描电镜图像显示，Mo的加入对WO3纳米结构的形貌有显著影响。此外，在WO3中引入MoO3的策略可以有效地提高WO3的气敏性能。特别是基于4?mol% MoO3/WO3复合纳米结构表现出增强的气敏性能，检测限低(500?ppb)。在28.5和18.2-100 ?PPM乙醇和丙酮在320?，分别是纯WO3的2.3倍和1.7倍。MoO3/WO3气体传感器传感性能的增强可归因于MoO3的加入，这与气敏机理有关。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.