Abstract Magnetron sputtering and gas aggregation source (GAS) approaches were combined for the preparation of columnar TiO2 structures decorated with PdO nanoparticles (NPs). The totally solvent-free synthesis approach provides good control of surface coverage, size, morphology, and stoichiometry of PdO NPs in comparison to wet chemical synthesis methods. X-ray photoelectron spectroscopy (XPS) analysis showed that the heat treatment led to the formation of a mixed oxide state PdO/PdO2 on the TiO2 layer. A steady equilibrium between PdO (oxidation by free and adsorbed •OH) and PdO2 (reduced by trapped photogenerated electrons) phases under UV irradiation seems to provide an efficient electron-hole pair separation. Such robust PdO–TiO2 thin films have a strong potential for use as photocatalytic and self-cleaning windows or similar out-door technical surfaces.

中文翻译：

---

PdO 纳米粒子装饰的 TiO2 薄膜具有增强的光催化和自清洁性能

摘要 结合磁控溅射和气体聚集源 (GAS) 方法制备了 PdO 纳米粒子 (NPs) 装饰的柱状 TiO2 结构。与湿化学合成方法相比，完全无溶剂合成方法可以很好地控制 PdO NPs 的表面覆盖率、尺寸、形态和化学计量。X 射线光电子能谱 (XPS) 分析表明，热处理导致在 TiO2 层上形成混合氧化物状态 PdO/PdO2。在紫外线照射下，PdO（被游离和吸附的 •OH 氧化）和 PdO2（被捕获的光生电子还原）相之间的稳定平衡似乎提供了有效的电子-空穴对分离。