Catalytic wet peroxide oxidation (CWPO) is widely used to remove organic pollutants in industrial wastewater, however, the remained challenges in circulating Fe³⁺/Fe²⁺ ions, inevitably forming iron sludge and massively consuming H₂O₂ limit its applications. Herein, the coupling of CWPO and photocatalytic water oxidation on decahedron BiVO₄ crystals was reported to solve the above challenges. Using spatial photogenerated charge separation between different facets of BiVO₄, efficiently circulating Fe³⁺ to Fe²⁺ was realized with a selectivity of ~100%, which greatly inhibits the formation of iron sludge. Moreover, in-situ formation of H₂O₂ through two-hole-involved photocatalytic water oxidation on BiVO₄ replenishes the H₂O₂ consuming in the CWPO process. The coupling system exhibits a much higher total organic carbon (TOC) removal than the CWPO process in various pollutants, giving an improvement of rate constant to more than 10 times. This work provides a potential coupling route for advanced degradation of organic pollutants in wastewater treatment.

催化湿法过氧化物氧化（CWPO）广泛用于去除工业废水中的有机污染物，但由于循环Fe ³⁺ /Fe ²⁺离子、不可避免地形成铁泥和大量消耗H ₂ O ₂等问题，限制了其应用。本文报道了 CWPO 和光催化水氧化在十面体 BiVO ₄晶体上的耦合以解决上述挑战。利用BiVO _{4不同晶面之间的空间光生电荷分离，有效地将Fe} ³⁺循环到Fe ²⁺以~100％的选择性实现，这极大地抑制了铁泥的形成。_{此外，在BiVO 4}上通过双孔参与的光催化水氧化原位形成H ₂ O ₂补充了CWPO过程中消耗的H ₂ O _{2 。}与 CWPO 工艺相比，该耦合系统在各种污染物中的总有机碳 (TOC) 去除率要高得多，速率常数提高了 10 倍以上。该工作为废水处理中有机污染物的深度降解提供了一条潜在的耦合途径。