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<p>For in situ remediation of surface waters, where contaminant sources and distributions are highly heterogeneous, developing an approach that combines broad-spectrum oxidative capacity with selective removal of trace yet high-risk pollutants remains a central challenge. Here we report a light-responsive Cu-anchoring strategy on a UiO-66-NH<sub>2</sub> metal–organic framework that establishes a dynamic heterogeneous–homogeneous photocatalytic platform. Upon illumination, photolabile Cu sites release mobile Cu<sup>+</sup> species that function as long-lived reductive mediators, dramatically promoting multi-electron O<sub>2</sub> activation and boosting •OH generation by nearly two orders of magnitude. The regenerated Cu<sup>2+</sup> concurrently imparts molecular selectivity, enabling efficient antibiotic degradation and robust disinfection even in organic-rich natural waters. Embedding this catalyst into a buoyant membrane further enhances deployment flexibility and environmental adaptability. In an amplified 28-day outdoor evaluation treating real lake water, the membrane achieved high contaminant degradation efficiency while sustainably suppressing microbial and pollutant rebound, underscoring its long-term operational robustness in natural aquatic systems.</p>

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Engineering dynamic heterogeneous–homogeneous hybrid interfaces for solar-driven in situ water remediation

  • 期刊论文

  • 发表日期：

    2026年6月1日

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  • Zhiyong Zhang,
  • Tengxin Cao,
  • Ruimin Chen,
  • Boyang Zhang,
  • Jinyu Zhao,
  • Xu Wang,
  • Ming Su,
  • Min Yang,
  • Chuncheng Chen,
  • Hua Sheng,
  • Jincai Zhao

摘要

For in situ remediation of surface waters, where contaminant sources and distributions are highly heterogeneous, developing an approach that combines broad-spectrum oxidative capacity with selective removal of trace yet high-risk pollutants remains a central challenge. Here we report a light-responsive Cu-anchoring strategy on a UiO-66-NH2 metal–organic framework that establishes a dynamic heterogeneous–homogeneous photocatalytic platform. Upon illumination, photolabile Cu sites release mobile Cu+ species that function as long-lived reductive mediators, dramatically promoting multi-electron O2 activation and boosting •OH generation by nearly two orders of magnitude. The regenerated Cu2+ concurrently imparts molecular selectivity, enabling efficient antibiotic degradation and robust disinfection even in organic-rich natural waters. Embedding this catalyst into a buoyant membrane further enhances deployment flexibility and environmental adaptability. In an amplified 28-day outdoor evaluation treating real lake water, the membrane achieved high contaminant degradation efficiency while sustainably suppressing microbial and pollutant rebound, underscoring its long-term operational robustness in natural aquatic systems.