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<p>Integrating photocatalytic degradation and surface-enhanced Raman spectroscopy (SERS) detection into a single nanocomposite platform offers transformative potential for intelligent wastewater treatment. Herein, we engineered necklace-architected Ag/AgBr/TiO<sub>2</sub> nanofiber composites through in situ growth of Ag/AgBr nanoparticles on electrospun porous TiO<sub>2</sub> nanofibers. The unique architecture synergizes dual-phase anatase/rutile alignment, (001)-faceted anatase TiO<sub>2</sub>, and plasmonic Ag/AgBr-TiO<sub>2</sub> heterojunctions, achieving 100% RhB degradation in 10&#xa0;min (vs. 23.3% UV/42.2% Vis) and 93.6% Cr(VI) reduction in 40&#xa0;min under simulated sunlight, outperforming commercial P25, single-component counterparts, and previously reported TiO<sub>2</sub>-based photocatalysts. Notably, this study pioneers the integration of SERS detection with photocatalytic decontamination in a single system, enabling real-time monitoring of RhB and Cr<sub>2</sub>O<sub>7</sub><sup>2</sup>⁻ degradation processes via the plasmonic resonance of Ag/AgBr/TiO<sub>2</sub>. The dual-mode “detect-and-treat” functionality leverages the necklace-like morphology for enhanced charge separation, light scattering, and molecular adsorption, establishing a paradigm for intelligent wastewater remediation.</p>

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Necklace-architected Ag/AgBr/TiO₂ nanofiber composites: dual-mode catalysis for synchronous SERS detection and solar-driven decontamination of RhB/Cr(VI) in wastewater

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Qingtao Chen,
  • Xiangdong Shi,
  • Xianghai Rao,
  • Xiaoyun Qin,
  • Ziyi Zheng,
  • Heyi Ge,
  • Yiying Ling,
  • Jiong Li,
  • Fenghua Chen

摘要

Integrating photocatalytic degradation and surface-enhanced Raman spectroscopy (SERS) detection into a single nanocomposite platform offers transformative potential for intelligent wastewater treatment. Herein, we engineered necklace-architected Ag/AgBr/TiO2 nanofiber composites through in situ growth of Ag/AgBr nanoparticles on electrospun porous TiO2 nanofibers. The unique architecture synergizes dual-phase anatase/rutile alignment, (001)-faceted anatase TiO2, and plasmonic Ag/AgBr-TiO2 heterojunctions, achieving 100% RhB degradation in 10 min (vs. 23.3% UV/42.2% Vis) and 93.6% Cr(VI) reduction in 40 min under simulated sunlight, outperforming commercial P25, single-component counterparts, and previously reported TiO2-based photocatalysts. Notably, this study pioneers the integration of SERS detection with photocatalytic decontamination in a single system, enabling real-time monitoring of RhB and Cr2O72⁻ degradation processes via the plasmonic resonance of Ag/AgBr/TiO2. The dual-mode “detect-and-treat” functionality leverages the necklace-like morphology for enhanced charge separation, light scattering, and molecular adsorption, establishing a paradigm for intelligent wastewater remediation.