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<p>In this study, a series of La-doped CuO composites with different La doping amounts in the form of shuttle-shaped flakes were successfully prepared via the hydrothermal method. A combination of characterization techniques, including XRD, SEM, TEM, XPS, BET, UV–Vis, and PL, was employed to thoroughly investigate the composites’ nanostructure and optical properties. The evaluation of the photocatalytic performance for the La-doped CuO composites was performed by employing antibiotic degradation as a model reaction under visible light. Among all synthesized catalysts, LaCu-7 with a 7% La doping ratio showed the best photocatalytic performance, outperforming both pure CuO and other La-doped CuO composites. Under 120&#xa0;min of xenon lamp irradiation, LaCu-7 achieved a degradation rate of 96.35% for oxytetracycline (OTC). Additionally, the LaCu-7 composite displayed excellent durability and stability over five consecutive cycles. Building upon these findings, the research further identified the dominant active species and thereby elucidated the photocatalytic mechanism. The photocatalytic enhancement effect of La-doped CuO is the result of the combined action of multiple factors: La doping improves the charge separation efficiency, while the increased specific surface area provides more abundant surface active sites<b>.</b> These findings highlight the potential of La-doped CuO composites as efficient photocatalysts in various applications, particularly in the field of organic pollutant treatment.</p>

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Enhanced photocatalytic performance of La-doped CuO composite materials by a one-pot hydrothermal method

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • Aofan Zhang,
  • Yanping Du,
  • Longxiang Zhang,
  • Jiayao Zhang,
  • Li-Na Zheng,
  • Wei Chang,
  • Bin Liu

摘要

In this study, a series of La-doped CuO composites with different La doping amounts in the form of shuttle-shaped flakes were successfully prepared via the hydrothermal method. A combination of characterization techniques, including XRD, SEM, TEM, XPS, BET, UV–Vis, and PL, was employed to thoroughly investigate the composites’ nanostructure and optical properties. The evaluation of the photocatalytic performance for the La-doped CuO composites was performed by employing antibiotic degradation as a model reaction under visible light. Among all synthesized catalysts, LaCu-7 with a 7% La doping ratio showed the best photocatalytic performance, outperforming both pure CuO and other La-doped CuO composites. Under 120 min of xenon lamp irradiation, LaCu-7 achieved a degradation rate of 96.35% for oxytetracycline (OTC). Additionally, the LaCu-7 composite displayed excellent durability and stability over five consecutive cycles. Building upon these findings, the research further identified the dominant active species and thereby elucidated the photocatalytic mechanism. The photocatalytic enhancement effect of La-doped CuO is the result of the combined action of multiple factors: La doping improves the charge separation efficiency, while the increased specific surface area provides more abundant surface active sites. These findings highlight the potential of La-doped CuO composites as efficient photocatalysts in various applications, particularly in the field of organic pollutant treatment.