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Layer-by-Layer Self-assembly of Co3O4 Nanorod-Decorated MoS2 Nanosheet-Based Nanocomposite toward High-Performance Ammonia Detection
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-02-08 00:00:00 , DOI: 10.1021/acsami.6b15669 Dongzhi Zhang 1 , Chuanxing Jiang 1 , Peng Li 2 , Yan’e Sun 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-02-08 00:00:00 , DOI: 10.1021/acsami.6b15669 Dongzhi Zhang 1 , Chuanxing Jiang 1 , Peng Li 2 , Yan’e Sun 1
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This article is the first demonstration of a molybdenum disulfide (MoS2)/tricobalt tetraoxide (Co3O4) nanocomposite film sensor toward NH3 detection. The MoS2/Co3O4 film sensor was fabricated on a substrate with interdigital electrodes via layer-by-layer self-assembly route. The surface morphology, nanostructure, and elemental composition of the MoS2/Co3O4 samples were examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy. The characterization results confirmed its successful preparation and rationality. The NH3 sensing properties of the sensor for ultra-low-concentration detection were investigated at room temperature. The experimental results revealed that high sensitivity, good repeatability, stability, and selectivity and fast response/recovery characteristics were achieved by the sensor toward NH3. Moreover, the MoS2/Co3O4 nanocomposite film sensor exhibited significant enhancement in ammonia-sensing properties in comparison with the MoS2 and Co3O4 counterparts. The underlying sensing mechanisms of the MoS2/Co3O4 nanocomposite toward ammonia were ascribed to the layered nanostructure, synergistic effect, and heterojunction created at the interface of n-type MoS2 and p-type Co3O4. The synthesized MoS2/Co3O4 nanocomposite proved to be an excellent candidate for constructing high-performance ammonia sensor for various applications.
中文翻译：
Co 3 O 4纳米棒修饰的基于MoS 2纳米片的纳米复合材料的逐层自组装，用于高性能氨检测
本文是针对NH 3检测的二硫化钼（MoS 2）/四氧化三钴（Co 3 O 4）纳米复合膜传感器的首次演示。MoS 2 / Co 3 O 4薄膜传感器通过层间自组装路径在具有叉指电极的基板上制造。MoS 2 / Co 3 O 4的表面形态，纳米结构和元素组成通过扫描电子显微镜，透射电子显微镜，X射线衍射，能量分散光谱和X射线光电子光谱检查样品。表征结果证实了其成功的制备和合理性。在室温下研究了用于超低浓度检测的传感器的NH 3感测特性。实验结果表明，该传感器对NH 3具有很高的灵敏度，良好的重复性，稳定性，选择性和快速的响应/恢复特性。此外，与MoS相比，MoS 2 / Co 3 O 4纳米复合膜传感器的氨感测性能显着增强。2和Co 3 O 4对应物。MoS 2 / Co 3 O 4纳米复合材料对氨的潜在传感机制归因于在n型MoS 2和p型Co 3 O 4的界面处形成的层状纳米结构，协同效应和异质结。事实证明，合成的MoS 2 / Co 3 O 4纳米复合材料是构建适用于各种应用的高性能氨传感器的理想选择。
更新日期：2017-02-08
中文翻译：
Co 3 O 4纳米棒修饰的基于MoS 2纳米片的纳米复合材料的逐层自组装，用于高性能氨检测
本文是针对NH 3检测的二硫化钼（MoS 2）/四氧化三钴（Co 3 O 4）纳米复合膜传感器的首次演示。MoS 2 / Co 3 O 4薄膜传感器通过层间自组装路径在具有叉指电极的基板上制造。MoS 2 / Co 3 O 4的表面形态，纳米结构和元素组成通过扫描电子显微镜，透射电子显微镜，X射线衍射，能量分散光谱和X射线光电子光谱检查样品。表征结果证实了其成功的制备和合理性。在室温下研究了用于超低浓度检测的传感器的NH 3感测特性。实验结果表明，该传感器对NH 3具有很高的灵敏度，良好的重复性，稳定性，选择性和快速的响应/恢复特性。此外，与MoS相比，MoS 2 / Co 3 O 4纳米复合膜传感器的氨感测性能显着增强。2和Co 3 O 4对应物。MoS 2 / Co 3 O 4纳米复合材料对氨的潜在传感机制归因于在n型MoS 2和p型Co 3 O 4的界面处形成的层状纳米结构，协同效应和异质结。事实证明，合成的MoS 2 / Co 3 O 4纳米复合材料是构建适用于各种应用的高性能氨传感器的理想选择。
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