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<p>Cu<sub>2</sub>O has received more attention due to its non-toxicity, low preparation cost, abundant reserves, and environmental friendliness. Previous studies have shown that the morphology and structure of the crystals have a great impact on the physical and chemical properties of the materials. In this paper, three Cu<sub>2</sub>O nanomaterials with different morphologies including cubic, octahedral and dodecahedral were successfully prepared by hydrothermal method. The visible light induced degradation properties of the three Cu<sub>2</sub>O nanomaterials were investigated using tetracycline (TC) as a model contaminant. The conclusion shown that Cu<sub>2</sub>O cubes had the highest photocatalytic activity and could remove 84.2% of TC within 1&#xa0;h. Combined with photocurrent and EIS curves, the Cu<sub>2</sub>O cubes possessed superior charge transfer ability and could effectively inhibit the reorganization of charge transfer. In addition, the cubic Cu<sub>2</sub>O has the largest specific surface area, which is very conducive to the increase of the surfactant sites of the photocatalyst and the adsorption of pollutants, thus exhibiting excellent photocatalytic performance. The results confirmed that adjusting the Cu<sub>2</sub>O morphology could effectively improve its photocatalytic activity. In addition the results of radicals trapping experiments shown that superoxide radicals (<sup><b>.</b></sup>O<sub>2</sub><sup>−</sup>) played a dominant role in the degradation process of TC.</p>

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Photocatalytic Activity and Mechanism of Tetracycline Degradation by Cu2O with Different Morphologies

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Ruibin Zhang,
  • Qiang Gao,
  • Mengnan Wang,
  • Yining Zhu,
  • Mingjin Zhang

摘要

Cu2O has received more attention due to its non-toxicity, low preparation cost, abundant reserves, and environmental friendliness. Previous studies have shown that the morphology and structure of the crystals have a great impact on the physical and chemical properties of the materials. In this paper, three Cu2O nanomaterials with different morphologies including cubic, octahedral and dodecahedral were successfully prepared by hydrothermal method. The visible light induced degradation properties of the three Cu2O nanomaterials were investigated using tetracycline (TC) as a model contaminant. The conclusion shown that Cu2O cubes had the highest photocatalytic activity and could remove 84.2% of TC within 1 h. Combined with photocurrent and EIS curves, the Cu2O cubes possessed superior charge transfer ability and could effectively inhibit the reorganization of charge transfer. In addition, the cubic Cu2O has the largest specific surface area, which is very conducive to the increase of the surfactant sites of the photocatalyst and the adsorption of pollutants, thus exhibiting excellent photocatalytic performance. The results confirmed that adjusting the Cu2O morphology could effectively improve its photocatalytic activity. In addition the results of radicals trapping experiments shown that superoxide radicals (.O2−) played a dominant role in the degradation process of TC.