Plasma Cu-decorated TiO_2−x/CoP particle-level hierarchical heterojunction photocatalysts with surface engineering were fabricated through solvothermal and solid phase reduction strategies. The CoP nanoparticles not only serve as a cost-effective cocatalyst but also provide abundant surface active sites, which facilitate rapid transfer of photogenerated carriers. The Ti³⁺ and oxygen vacancy defects extend photoresponse from UV to visible light region, and enhance the separation efficiency of photogenerated carriers efficiently. Because of surface plasma resonance (SPR) of Cu, Cu/TiO_2−x/CoP with average particle size of 100–200 nm has significant photothermal effect, in which the temperature of Cu/TiO_2−x/CoP is increased by 76 °C with irradiation for 30 s, ~ 8 times higher than that of the original TiO₂. Cu/TiO_2−x/CoP exhibits a high photocatalytic degradation rates for highly toxic 2,4-dichlorophenol (99.2%) and 2,4,6-trichlorophenol (98.5%), which higher 7.6 and 8.9 times than the initial TiO₂, respectively. Thanks to the particle-level hierarchical heterojunction, the efficient surface engineering and SPR effect favoring the spatial charge separation, Cu/TiO_2−x/CoP shows excellent photocatalytic-photothermal Performance. This particle-level hierarchical heterojunction architectural design provides a new insight for synthesizing particulate photocatalysts with high-efficiency.

通过溶剂热和固相还原策略，制备了具有表面工程学的等离子修饰的Cu 2+ TiO _{2 x} / CoP颗粒级分层异质结光催化剂。CoP纳米颗粒不仅可以用作具有成本效益的助催化剂，还可以提供丰富的表面活性位点，从而促进光生载流子的快速转移。Ti ³⁺和氧空位缺陷将光响应从UV扩展到可见光区域，并有效地提高了光生载流子的分离效率。由于Cu的表面等离子体共振（SPR），平均粒径为100–200 nm的Cu / TiO _2−x / CoP具有显着的光热效应，其中Cu / TiO _2−x的温度辐照30 s可使/ CoP升高76°C，约为原始TiO _2的8倍。Cu / TiO _2-x / CoP对高毒性的2,4-二氯苯酚（99.2％）和2,4,6-三氯苯酚（98.5％）表现出高的光催化降解率，比初始TiO ₂高7.6和8.9倍， 分别。由于粒子级的分层异质结，有效的表面工程和SPR效应有利于空间电荷分离，因此Cu / TiO _2-x / CoP表现出优异的光催化-光热性能。这种颗粒级的分层异质结体系结构设计为高效合成颗粒光催化剂提供了新的见解。