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Nano-designed λ-CaCO3@rGO photo-catalyst for effective adsorption and simultaneous removal of organic pollutant

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Abstract

Well-dispersed λ-CaCO3 thin layers @ rGO as photo-catalyst for the removal of organic pollutant was synthesized by hydrothermal treatment. The coordination between the functional groups on graphene and Ca2+ ion provides the path for the nucleation of CaCO3 and form a vander waal force with graphene sheet. The presented λ-CaCO3@rGO nanocomposite was characterized by using X-ray diffraction, FTIR, field-emission scanning electron microscopy and high resolution transmission electron microscopy analysis. The photo-catalytic activities of as-prepared CaCO3 nanoparticles, rGO and λ-CaCO3@rGO nanocomposite were evaluated by the photo-catalytic degradation of methyl orange in aqueous solutions under visible light irradiation. Alone, it is expected, that CaCO3 and graphene do have insignificant photo-catalytic activity due to optical properties of both materials. However, synthesis of λ-CaCO3 thin layers @ rGO shows good performance due to alteration of band gap. Therefore, compared to pristine CaCO3 nanoparticles and rGO, the λ-CaCO3@rGO photo-catalysts showed significant enhancement in photocatalytic activity.

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Acknowledgments

This Research was financially supported by National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIP) (No. 2014R1A4A1008140).

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    Authors and Affiliations

    1. Applied Materials Institute for BIN Convergence, Chonbuk National University, Jeonju, 561-756, Republic of Korea

      Prem Singh Saud, Zafar Khan Ghouri & Hak Yong Kim

    2. Department of Organic Materials and Fiber Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea

      Prem Singh Saud, Zafar Khan Ghouri, Nasser A. M. Barakat & Hak Yong Kim

    3. Department of Chemical Engineering, Faculty of Engineering, El-Minia University, El-Minia, Egypt

      Nasser A. M. Barakat

    4. Production Engineering & Design Department, Faculty of Engineering, Minia University, Minia, 61111, Egypt

      Mohamed K. Hassan

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    1. Prem Singh Saud
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    2. Zafar Khan Ghouri
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    4. Nasser A. M. Barakat
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    Correspondence to Nasser A. M. Barakat or Hak Yong Kim.

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    Prem Singh Saud and Zafar Khan Ghouri have contributed equally to this work.

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    Saud, P.S., Ghouri, Z.K., K. Hassan, M. et al. Nano-designed λ-CaCO3@rGO photo-catalyst for effective adsorption and simultaneous removal of organic pollutant. J Mater Sci: Mater Electron 27, 9593–9598 (2016). https://doi.org/10.1007/s10854-016-5014-3

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    • DOI: https://doi.org/10.1007/s10854-016-5014-3

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