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<p>In order to address the problems of antibiotic contamination in the aquatic environment, in this research, ZnSn(OH)<sub>6</sub>/Cu<sub>2</sub>O (ZHS/Cu<sub>2</sub>O) composites were prepared by incorporating Cu<sub>2</sub>O into ZnSn(OH)<sub>6</sub>, in the process, Cu<sub>2</sub>O nanoparticles were uniformly wrapped on the surface of ZHS cubes, and then in situ degradation of tetracycline hydrochloride (TC) was carried out under visible light. The optical, photovoltaic and photocatalytic properties of ZHS/Cu<sub>2</sub>O composites could be modulated by varying the doping amount of Cu<sub>2</sub>O in the material preparation. As expected, the optimal ZHS/Cu<sub>2</sub>O-2 showed high photocatalytic performance after 90&#xa0;min (the removal rate of TC was 93.4%), and clarified the promoting effect of water flow vibration on the photocatalytic degradation of the system. Based on the experimental results, we proposed the formation of p–n heterojunction on ZHS/Cu<sub>2</sub>O and the transfer path of hole-electron pairs, and speculated the reaction mechanism of photocatalytic degradation of TC. This work provides a reasonable and simple strategy for the practical application of copper-based double hydroxide semiconductor catalytic materials in the field of antibiotics for environmental water treatment.</p>

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Heterogeneous structure construction of nanometer Cu2O and ZnSn(OH)6 cubes and the mechanism of efficient photocatalytic degradation of TC

  • 期刊论文

  • 发表日期：

    2026年1月2日

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  • Tu Zhou,
  • Zhi Liu,
  • Mujia Feng,
  • Huajun Sun,
  • Xiaofang Liu

摘要

In order to address the problems of antibiotic contamination in the aquatic environment, in this research, ZnSn(OH)6/Cu2O (ZHS/Cu2O) composites were prepared by incorporating Cu2O into ZnSn(OH)6, in the process, Cu2O nanoparticles were uniformly wrapped on the surface of ZHS cubes, and then in situ degradation of tetracycline hydrochloride (TC) was carried out under visible light. The optical, photovoltaic and photocatalytic properties of ZHS/Cu2O composites could be modulated by varying the doping amount of Cu2O in the material preparation. As expected, the optimal ZHS/Cu2O-2 showed high photocatalytic performance after 90 min (the removal rate of TC was 93.4%), and clarified the promoting effect of water flow vibration on the photocatalytic degradation of the system. Based on the experimental results, we proposed the formation of p–n heterojunction on ZHS/Cu2O and the transfer path of hole-electron pairs, and speculated the reaction mechanism of photocatalytic degradation of TC. This work provides a reasonable and simple strategy for the practical application of copper-based double hydroxide semiconductor catalytic materials in the field of antibiotics for environmental water treatment.