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<p>A 2D-2D Ni-doped Mg<sub>2</sub>Al-layered double hydroxide/g-C<sub>3</sub>N<sub>4</sub> (Ni-LDH/g-C<sub>3</sub>N<sub>4</sub>) composite material was ingeniously designed and prepared utilizing a green and facile strategy, which displayed an excellent photocatalytic performance for tetracycline degradation under visible light irradiation. The morphology of Ni-LDH material was the shape of nanosheets and its size was in the range of 200 to 400&#xa0;nm, which was incorporated into g-C<sub>3</sub>N<sub>4</sub> to construct 2D-2D composite structure. In the Ni-LDH/g-C<sub>3</sub>N<sub>4</sub> composite materials, Ni-LDH materials played an important role in improving its separation and transfer efficiency of photo-generated charge carriers, as demonstrated by photoelectrochemical measurement. Thereinto, it can be obtained that the Ni-LDH/g-C<sub>3</sub>N<sub>4</sub> materials possessed much higher photocatalytic performance than pristine g-C<sub>3</sub>N<sub>4</sub> and Mg<sub>2</sub>Al-layered double hydroxide/g-C<sub>3</sub>N<sub>4</sub> materials, suggesting that it was much more beneficial to accelerate the photocatalytic reaction process. Additionally, the optimal Ni-LDH/g-C<sub>3</sub>N<sub>4</sub> material, namely CNANi-10 sample, achieved a 73.3% degradation rate for tetracycline (10&#xa0;ppm) within 90&#xa0;min. Remarkably, the active species trapping experiments were implemented using the CNANi-10 sample, revealing that the superoxide radicals (·O<sub>2</sub><sup>−</sup>) and hole (h<sup>+</sup>) were the major active species to participate in the photocatalytic oxidation process. Prospectively, this work provides an efficient and low-cost strategy to construct efficient photocatalysts for water remediation.</p>

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Ingenious fabrication of Ni-doped Mg2Al-layered double hydroxide/g-C3N4 composite material for efficient photocatalytic degradation of tetracycline

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • Xiaobin Liu,
  • liqin Lin,
  • Wentao Xu,
  • Miaoqiong Xu,
  • Huaqiang Zhuang,
  • Yongshan Chen,
  • Xiaoyang Pan,
  • Qingbiao Li

摘要

A 2D-2D Ni-doped Mg2Al-layered double hydroxide/g-C3N4 (Ni-LDH/g-C3N4) composite material was ingeniously designed and prepared utilizing a green and facile strategy, which displayed an excellent photocatalytic performance for tetracycline degradation under visible light irradiation. The morphology of Ni-LDH material was the shape of nanosheets and its size was in the range of 200 to 400 nm, which was incorporated into g-C3N4 to construct 2D-2D composite structure. In the Ni-LDH/g-C3N4 composite materials, Ni-LDH materials played an important role in improving its separation and transfer efficiency of photo-generated charge carriers, as demonstrated by photoelectrochemical measurement. Thereinto, it can be obtained that the Ni-LDH/g-C3N4 materials possessed much higher photocatalytic performance than pristine g-C3N4 and Mg2Al-layered double hydroxide/g-C3N4 materials, suggesting that it was much more beneficial to accelerate the photocatalytic reaction process. Additionally, the optimal Ni-LDH/g-C3N4 material, namely CNANi-10 sample, achieved a 73.3% degradation rate for tetracycline (10 ppm) within 90 min. Remarkably, the active species trapping experiments were implemented using the CNANi-10 sample, revealing that the superoxide radicals (·O2−) and hole (h+) were the major active species to participate in the photocatalytic oxidation process. Prospectively, this work provides an efficient and low-cost strategy to construct efficient photocatalysts for water remediation.