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Preparation of g-C3N4/Ta2O5 Composites with Enhanced Visible-Light Photocatalytic Activity

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Abstract

g-C3N4/Ta2O5 composites have been synthesized by a facile route in which mixtures of Ta2O5 and urea are heated at various temperatures of 450°C, 500°C, and 550°C. The obtained materials (denoted as CN/TaO-T, where T is the heating temperature) were characterized using x-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, diffuse-reflectance ultraviolet–visible (UV–Vis) spectroscopy, thermogravimetric analysis, and x-ray photoelectron spectroscopy. The results show that the as-prepared composites are in orthorhombic Ta2O5 phase coated by g-C3N4. The photocatalytic activity of the composites was evaluated by photodegradation of methylene blue under visible light. Among the three materials, CN/TaO-500 exhibited the highest photocatalytic activity. The improved photocatalytic activity of the g-C3N4/Ta2O5 composites is attributed to the presence of g-C3N4 in the materials.

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Acknowledgements

This work was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) (NRF-2015R1A2A2A01004275).

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Authors and Affiliations

  1. Department of Chemistry, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Vietnam

    Vien Vo, Nguyen Van Kim, Nguyen Thi Viet Nga & Nguyen Tien Trung

  2. Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 120-750, Korea

    Vien Vo & Sung-Jin Kim

  3. Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam

    Le Truong Giang

  4. Department of Physics, Hanoi National University of Education, Ha Noi, Vietnam

    Pham Van Hanh & Luc Huy Hoang

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  1. Vien Vo
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  2. Nguyen Van Kim
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  3. Nguyen Thi Viet Nga
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Correspondence to Vien Vo or Sung-Jin Kim.

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Vo, V., Van Kim, N., Nga, N.T.V. et al. Preparation of g-C3N4/Ta2O5 Composites with Enhanced Visible-Light Photocatalytic Activity. J. Electron. Mater. 45, 2334–2340 (2016). https://doi.org/10.1007/s11664-015-4280-9

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  • DOI: https://doi.org/10.1007/s11664-015-4280-9

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