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Hydrothermal Synthesis of CNTs/Co3O4@rGO Mesopours Nanocomposite as a Room Temperature Gas Sensor for VOCs

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Abstract

In the present paper, the effect of reduced graphene oxide (rGO) and carbon nanotubes (CNTs) on the gas-sensing properties of Co3O4 has been reported. The Co3O4/CNTs@rGO composite was synthesized using hydrothermal method. Samples were characterized by high resolution transmission electron microscope, Raman spectroscopy, Fourier transform infrared spectroscopy, differential thermal analysis, thermogravimetric analysis, Brunauer–Emmett–Teller surface area, and Barrett–Joyner–Halenda pore size measurements. The X-ray diffraction measurements confirmed the formation of the Co3O4 spinel structure. The Co3O4/CNTs@rGO exhibited mesoporous structure and high specific surface area of 92.9 m2/g. The gas-sensing properties of the synthesized composite are evaluated toward volatile organic compounds (VOCs). The gas-sensing tests revealed that the prepared composite showed a remarkable response to ethanol at room temperature compared to other volatile organic compounds with fast response time. Due to the intriguing merits characteristics, Co3O4/CNTs@rGO composite could achieve remarkable sensitivity to VOCs especially ethanol, demonstrating great potential in next-generation room-temperature gas sensor based on P-type semiconductor.

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Acknowledgements

The authors express their appreciation to the Deanship of Scientific Research at King Khalid University for funding this work through research groups program under Grant Number R.G.P.2/9/38.

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Authors and Affiliations

  1. Building Physics and Environment Institute, Housing & Building National Research Center (HBRC), Dokki, 12311, Giza, Egypt

    M. Morsy

  2. Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia

    I. S. Yahia & H. Y. Zahran

  3. Nanoscience Laboratory for Environmental and Biomedical Applications (NLEBA), Semiconductor Laboratory, Metallurgical Laboratory 2 Physics Department, Faculty of Education, Ain Shams University, Roxy, 11757, Cairo, Egypt

    I. S. Yahia & H. Y. Zahran

  4. Spectroscopy Department, National Research Centre, 33 El-Bohouth Str., Dokki, 12622, Giza, Egypt

    M. Ibrahim

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  1. M. Morsy
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  3. H. Y. Zahran
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  4. M. Ibrahim
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Correspondence to M. Morsy.

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Morsy, M., Yahia, I.S., Zahran, H.Y. et al. Hydrothermal Synthesis of CNTs/Co3O4@rGO Mesopours Nanocomposite as a Room Temperature Gas Sensor for VOCs. J Inorg Organomet Polym 29, 416–422 (2019). https://doi.org/10.1007/s10904-018-1011-8

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  • DOI: https://doi.org/10.1007/s10904-018-1011-8

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