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Synthesis and characterization of nanostructured MnO2-CoO and its relevance as an opto-electronic humidity sensing device

机译：纳米结构MnO2-COO的合成与表征及其与光电湿度传感装置的相关性

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摘要

Metal carboxylates are widely used in science and technology and have been the subject of intense studies due to the practical importance of their products. The present paper reports the synthesis of MnO2-CoO using metal carboxylates as precursors and the effect of humidity on the transmitted power through its thin film at room temperature. The refractive index of the material was found to be 1.445930 and the peak obtained from the photoluminescence spectra lies in the visible region. TEM reported a minimum grain size of approximate to 5.7 nm and SAED confirmed the crystalline nature of the material, which was further confirmed by XRD. Fluorescence characteristics also confirmed the low dimensionality of the material. The film was then investigated using SEM which exhibited the porous morphology. Through UV-Vis spectroscopy, it was found that the absorption of the film takes place in the UV region and the optical band-gap was observed to be 3.849 eV from the Tauc plot. The film was employed as a transmission based opto-electronic humidity sensor. Average sensitivity was found to be approximate to 2.225 W/% RH with response and recovery times of 47 s and 59 s respectively. Experiments were repeated and the reproducibility of result was found to be approximate to 89%.
机译：金属羧酸盐被广泛用于科学技术，并已激烈研究的主题，由于其产品的实际意义。本文报道的MnO 2-COO的使用金属羧酸盐作为前体和湿度对发射功率通过它的薄膜在室温下的效果的合成。的材料的折射率被认为是1.445930和在可见光区域，从光致发光光谱在于获得峰值。 TEM报道的近似的最小晶粒尺寸，以5.7纳米和SAED确认了材料，其进一步通过XRD证实的结晶性质。荧光特性也证实了材料的低维度。然后将膜使用SEM，其显示了多孔的形态的影响。通过UV-Vis光谱，发现，该薄膜的吸收发生在UV区域中，观察光学带隙是从Tauc图3.849伏特。该薄膜被用作基于透射光电湿度传感器。平均灵敏度被发现是近似2.225 W /％RH分别为47秒和59秒的响应和恢复时间。实验重复和结果的可重复性被认为是接近89％。

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  • 来源
    《RSC Advances》 |2018年第37期|共9页
  • 作者

    Sikarwar Samiksha; Yadav B. C.; Dzhardimalieva G. I.; Golubeva N. D.; Srivastava Pankaj;

  • 作者单位

    Babasaheb Bhimrao Ambedkar Univ Dept Phys Nanomat &

    Sensors Res Lab Lucknow 226025 Uttar Pradesh India;

    Babasaheb Bhimrao Ambedkar Univ Dept Phys Nanomat &

    Sensors Res Lab Lucknow 226025 Uttar Pradesh India;

    Russian Acad Sci Inst Problems Chem Phys Lab Metallopolymers Chernogolovka 142432 Moscow Region Russia;

    Russian Acad Sci Inst Problems Chem Phys Lab Metallopolymers Chernogolovka 142432 Moscow Region Russia;

    Babasaheb Bhimrao Ambedkar Univ Dept Phys Nanomat &

    Sensors Res Lab Lucknow 226025 Uttar Pradesh India;

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  • 正文语种 eng
  • 中图分类 化学;
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