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Fabrication of In2S3/NaTaO3 composite for enhancing the photocatalytic activity toward the degradation of tetracycline

Abstract

The rapid recombination of electrons and holes in a single photocatalyst largely limits photocatalytic efficiency. To fabricate the heterojunction with suitable band energy of two different semiconductors is considered as an effective strategy to address this issue and thus improve the photocatalytic activity. In this work, In2S3/NaTaO3 composite was prepared by a facile hydrothermal reaction. In comparison with the pure NaTaO3 and In2S3, In2S3/NaTaO3 composite exhibits enhanced photocatalytic efficiency towards the degradation of tetracycline hydrochloride (TC) under the simulated solar irradiation. The formation of heterojunction is significantly enhancing the transfer and separation efficiency of photo-generated electrons and holes. This could be validated by the transient photocurrent responses and electrochemical impedance spectra. The trapping experiment and electron paramagnetic resonance suggest that the holes and superoxide radical are main species in the photocatalytic reaction. Finally, a possible photocatalytic mechanism was proposed based on the experimental results and the energy band diagram between NaTaO3 and In2S3.

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Publication details

The article was received on 26 Dec 2017, accepted on 12 Feb 2018 and first published on 13 Feb 2018


Article type: Paper
DOI: 10.1039/C7NJ05123A
Citation: New J. Chem., 2018, Accepted Manuscript
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    Fabrication of In2S3/NaTaO3 composite for enhancing the photocatalytic activity toward the degradation of tetracycline

    J. Xu, B. Luo, W. Gu, Y. Jian, F. Wu, Y. Tang and H. Shen, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C7NJ05123A

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