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<p>The research aims to enhance the efficiency of photocatalytic hydrogen production from water splitting. In response to the current issues of insufficient simulated sunlight response in TiO<sub>2</sub> photocatalysts and the high cost associated with noble metal loading, a novel strategy of embedding C<sub>3</sub>N<sub>4</sub> quantum dots (QDs) onto defective TiO<sub>2</sub> nanospheres is proposed. Through a hydrothermal method combined with filtration purification, C<sub>3</sub>N<sub>4</sub> QDs were successfully incorporated into mesoporous TiO<sub>2</sub>. Leveraging the electron-withdrawing properties of C<sub>3</sub>N<sub>4</sub> QDs, the simulated sunlight absorption capacity, charge separation efficiency, and hydrogen production active sites of the photocatalyst were significantly enhanced. The results demonstrate that the C<sub>3</sub>N<sub>4</sub> QDs-TiO<sub>2</sub> composite photocatalyst exhibits an excellent hydrogen evolution rate of 7.3914 mmol/(g·h) under simulated sunlight irradiation, which is over 6.6 times that of pure TiO<sub>2</sub>. This study provides new insights and approaches for the development of efficient and low-cost photocatalytic materials for hydrogen production.</p> Graphical abstract <p></p> <p></p>

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C3N4 quantum dot sensitized mesoporous TiO2 nanospheres for efficient photocatalytic water splitting to produce hydrogen

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Yinghan Cao,
  • A. Genxiong,
  • Liang Wu,
  • Chenyang Liu,
  • Ziyao Li,
  • Haoyu Yuan,
  • Huiyan Pan,
  • Keliang Wu

摘要

The research aims to enhance the efficiency of photocatalytic hydrogen production from water splitting. In response to the current issues of insufficient simulated sunlight response in TiO2 photocatalysts and the high cost associated with noble metal loading, a novel strategy of embedding C3N4 quantum dots (QDs) onto defective TiO2 nanospheres is proposed. Through a hydrothermal method combined with filtration purification, C3N4 QDs were successfully incorporated into mesoporous TiO2. Leveraging the electron-withdrawing properties of C3N4 QDs, the simulated sunlight absorption capacity, charge separation efficiency, and hydrogen production active sites of the photocatalyst were significantly enhanced. The results demonstrate that the C3N4 QDs-TiO2 composite photocatalyst exhibits an excellent hydrogen evolution rate of 7.3914 mmol/(g·h) under simulated sunlight irradiation, which is over 6.6 times that of pure TiO2. This study provides new insights and approaches for the development of efficient and low-cost photocatalytic materials for hydrogen production.

Graphical abstract