Scholarlink

<p>Oxidation-driven polymerization of organic pollutants offers a route to convert contaminants into value-added products and enable continuous resource recovery from water, but conventional heterogeneous processes are plagued by polymeric overlayers that foul catalyst surfaces and hinder long-term operation. Here, we realize solution-phase polymerization of 4-chlorophenol (4-CP) by relocating key bond-forming steps from catalyst interfaces into the bulk aqueous phase. In a facet-engineered bismuth oxyiodide/hydrogen peroxide (BiOI/H<sub>2</sub>O<sub>2</sub>) system, BiOI directs H<sub>2</sub>O<sub>2</sub> activation toward in situ generation of freely diffusing, moderately oxidizing iodine (I<sub>2</sub>) as the dominant reactive species. Accordingly, I<sub>2</sub> drives 4-CP polymerization predominantly in solution rather than on the solid surface, delivering a record 73% retention of polymeric products in the aqueous phase. In situ scanning electrochemical cell microscopy (SECCM) directly visualizes the spatial generation of I<sub>2</sub> and its subsequent reaction with 4-CP. Complementary spectroscopy and density functional theory reveal that the (110) facet of BiOI stabilizes H<sub>2</sub>O<sub>2</sub> adsorption via a hydrogen-bond bridging configuration that promote O–O bond cleavage and I<sub>2</sub> formation, whereas other favors radical pathway. This “facet–species–phase” strategy, in which catalyst facets govern the dominant reactive species and thus direct solution-phase polymerization, enables fouling-resistant advanced oxidation that couples water purification with continuous resource recovery.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

In situ iodine generation enables solution-phase polymerization of organic pollutants for continuous resource recovery from water

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月15日

查看全文
  • Yan Wei,
  • Yuner Liu,
  • Mingyang Li,
  • Chaoyuan Deng,
  • Bo He,
  • Mingce Long,
  • Yu-Xin Ye,
  • Gangfeng Ouyang,
  • Zhengjun Gong

摘要

Oxidation-driven polymerization of organic pollutants offers a route to convert contaminants into value-added products and enable continuous resource recovery from water, but conventional heterogeneous processes are plagued by polymeric overlayers that foul catalyst surfaces and hinder long-term operation. Here, we realize solution-phase polymerization of 4-chlorophenol (4-CP) by relocating key bond-forming steps from catalyst interfaces into the bulk aqueous phase. In a facet-engineered bismuth oxyiodide/hydrogen peroxide (BiOI/H2O2) system, BiOI directs H2O2 activation toward in situ generation of freely diffusing, moderately oxidizing iodine (I2) as the dominant reactive species. Accordingly, I2 drives 4-CP polymerization predominantly in solution rather than on the solid surface, delivering a record 73% retention of polymeric products in the aqueous phase. In situ scanning electrochemical cell microscopy (SECCM) directly visualizes the spatial generation of I2 and its subsequent reaction with 4-CP. Complementary spectroscopy and density functional theory reveal that the (110) facet of BiOI stabilizes H2O2 adsorption via a hydrogen-bond bridging configuration that promote O–O bond cleavage and I2 formation, whereas other favors radical pathway. This “facet–species–phase” strategy, in which catalyst facets govern the dominant reactive species and thus direct solution-phase polymerization, enables fouling-resistant advanced oxidation that couples water purification with continuous resource recovery.