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首页> 外文期刊>Nanotechnology >Development of high-performance sensor based on NiO/SnO(2)heterostructures to study sensing properties towards various reducing gases
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Development of high-performance sensor based on NiO/SnO(2)heterostructures to study sensing properties towards various reducing gases

机译：基于NiO / SnO（2）异质结构的高性能传感器的开发研究传感性能对各种还原气体

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摘要

In this work, we report the spontaneous formation of NiO nanoparticles-decorated onto smooth SnO(2)nanofibers, which is an inexpensive and scalable method for yielding a high composite surface area via a simple two-step synthesis process based on electrospinning and the hydrothermal method. A Nickel Oxide proton-conducting electrolyte is deposited homogeneously over a large surface area in a transparent solution, mixed and decorated onto Tin dioxide nanofibers, as evidenced by cross sectional imaging of the electrospun nanofibers. The composite based on nanoparticle-decorated fibers enlarges the surface area of the exposed electrolyte, which fundamentally improves the overall gas sensing performance. The crystal structure, morphology, and physio-chemical surface state of the NiO/SnO2-based specimen are comprehensively examined using XRD, SEM, TEM, HRTEM, EDX, and photoelectron (XPS) spectroscopy. The composite based on NiO/SnO(2)nanoparticle-decorated fibers exhibits an optimistic mesoporous nature with a huge specific area, which is key for superior gas sensors. The result reveals that NiO/SnO(2)nanoparticle-decorated fibers with an average size of 180-260 nm in diameter, where the average length of fibers was about 1.5 mu m. The composite-based heterojunction of NiO/SnO(2)nanoparticle-decorated fibers enhances the adsorption of oxygen molecules, which show fast response, good selectivity and quick recovery speed against ethanol gas at an optimal temperature of about 160 degrees C. The maximum sensitivity response of the sensor-based composite NiO/SnO(2)nanoparticle-decorated fibers was 23.87 in respect of 100 ppm ethanol gas at a low temperature of 160 degrees C; this is approximately about 7.2 times superior to that of pure SnO(2)nanofibers. The superior gas sensing capabilities of a composite based on NiO/SnO(2)nanoparticle-decorated fibers may be attributable to the enhanced catalytic effect of the small sized NiO nanoparticles on smooth SnO(2)nanofibers, together with the p/n heterojunction effects between NiO and SnO(2)heterostructures.
机译：在这项工作中，我们将NIO纳米颗粒的自发形成装饰在光滑的SnO（2）纳米纤维上，这是一种廉价且可扩展的方法，其通过基于静电纺丝和水热的简单的两步合成过程产生高复合表面积。方法。氧化镍质子传导电解质在透明溶液中的大表面积上均匀沉积，混合并装饰到二氧化硫纳米纤维上，如电纺纳米纤维的横截面成像所证明的。基于纳米颗粒装饰纤维的复合材料扩大了暴露电解质的表面积，从而大大提高了整体气体传感性能。使用XRD，SEM，TEM，HRTEM，EDX和光电子（XPS）光谱全面地检查基于NiO / SnO2样本的晶体结构，形态和物理化学表面状态。基于NiO / SnO（2）纳米粒子装饰纤维的复合材料表现出具有巨大特定区域的乐观介孔性质，这是优质气体传感器的关键。结果显示，直径平均尺寸为180-260nm的NiO / SnO（2）纳米粒子装饰纤维，其中纤维的平均长度为约1.5μm。 NiO / SnO（2）纳米粒子装饰纤维的基于复合物的异质结增强了氧分子的吸附，其在最佳温度为约160℃的最佳温度下显示出快速的响应，良好的选择性和快速恢复速度。最大敏感性响应于基于传感器的复合NiO / SnO（2）纳米颗粒装饰纤维的响应在于100ppm乙醇气体在低温为160℃下为23.87;这约为纯SnO（2）纳米纤维的约7.2倍。基于NiO / SnO（2）纳米粒子装饰纤维的复合材料的优异气体传感能力可归因于小尺寸NIO纳米粒子对光滑的SnO（2）纳米纤维的增强催化作用，以及P / N异质结效应在NIO和SNO（2）异质结构之间。

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  • 来源
    《Nanotechnology》 |2020年第39期|共13页
  • 作者

    Din Salah Ud; Ul Haq Mahmood; Sajid Muhammad; Khatoon Rabia; Chen Xuehua; Li Li; Zhang Manjun; Zhu Liping;

  • 作者单位

    Zhejiang Univ State Key Lab Silicon Mat Sch Mat Sci &

    Engn Cyrus Tang Ctr Sensor Mat &

    Applicat Hangzhou 310027 Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Sch Mat Sci &

    Engn Cyrus Tang Ctr Sensor Mat &

    Applicat Hangzhou 310027 Peoples R China;

    Beijing Inst Technol Sch Mat Beijing Key Lab Construct Tailorable Adv Funct Ma Beijing Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Sch Mat Sci &

    Engn Cyrus Tang Ctr Sensor Mat &

    Applicat Hangzhou 310027 Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Sch Mat Sci &

    Engn Cyrus Tang Ctr Sensor Mat &

    Applicat Hangzhou 310027 Peoples R China;

    Guangdong Power Grid Co Ltd Elect Power Res Inst Guangzhou Peoples R China;

    Guangdong Power Grid Co Ltd Elect Power Res Inst Guangzhou Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Sch Mat Sci &

    Engn Cyrus Tang Ctr Sensor Mat &

    Applicat Hangzhou 310027 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    NiO; SnO2; nanoparticle-decorated fibers; ethanol; electrospinning; hydrothermal;

    机译：nio;sno2;纳米粒子装饰纤维;乙醇;静电纺丝;水热;

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