Effect of Contact Mode of TiO₂/g-C₃N₄ Heterojunction on Photocatalytic Performance for Dye Degradation

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  • Deng Zijian
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Osuga Ryota
    Institute for Catalysis, Hokkaido University
  • Matsubara Masaki
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University International Center for Synchrotron Radiation Innovation Smart, Tohoku University
  • Kanie Kiyoshi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University International Center for Synchrotron Radiation Innovation Smart, Tohoku University
  • Muramatsu Atsushi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University International Center for Synchrotron Radiation Innovation Smart, Tohoku University

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タイトル別名
  • Effect of Contact Mode of TiO<sub>2</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction on Photocatalytic Performance for Dye Degradation

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<p>Two types of TiO2/g-C3N4 heterojunctions, physically and chemically contacted samples, were synthesized to investigate the effect of their contact modes on the photocatalytic activity for dye degradation. The physically contacted TiO2/g-C3N4 heterojunction (TCNPHY) was prepared by an electrostatic assembly process. In addition, the chemically connected heterojunction (TCNCHE) was synthesized by a hydrothermal method accompanied by the formation of Ti–O–C covalent bonds. Fourier-transform infrared and X-ray photoelectron spectroscopies confirmed the formation of Ti–O–C covalent bonds in TCNCHE. Subsequently, their photocatalytic activity for dye degradation was evaluated as a model reaction. The results showed that TCNCHE exhibited higher degradation efficiency than TCNPHY because of its higher UV light absorbance and lower recombination rate than those of the physically contacted sample. These results indicate that the hydrothermal method gives unique advantages in chemically contacted heterojunction construction, which can lead to the improvement of photocatalytic activity.</p>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 64 (12), 2782-2791, 2023-12-01

    公益社団法人 日本金属学会

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