Ultrathin semiconductor nanosheets decorated with metallic nanoparticles (NPs) are promising in photocatalysis due to the multi-component interactions. The materials with a series of monometallic Pd and bimetallic Au-Pd NPs anchored on Bi₂WO₆ ultrathin nanosheets were synthesized and developed as photocatalysts for selective oxidation of aromatic alcohols to aromatic aldehyde. By optimizing the metallic contents, a typical sample of Au(0.25)Pd(0.25)-Bi₂WO₆ exhibited the highest photocatalytic activity among all the prepared photocatalysts including Au(0.5)-Bi₂WO₆, Pd(x)-Bi₂WO₆, Au(x)Pd(x)-Bi₂WO₆ (x represents the weight percentage of metal in the photocatalyst), along with the improved selectivity for producing benzaldehyde. The extended absorption in visible range, higher efficiency for the transfer and separation of photogenerated charge carriers, and the superior ability for generating active radicals of Au(0.25)Pd(0.25)-Bi₂WO₆ were demonstrated by DRS spectra, photoelectrochemical measurements, and ESR detection. The effect of the active species for selective oxidation of aromatic alcohols was proved to follow the order of h⁺ + O₂⁻ > h⁺ >> O₂⁻. Accordingly, a possible mechanism based on the interfacial cooperation between bimetallic Au-Pd NPs and Bi₂WO₆ ultrathin nanosheets was proposed to illustrate the photocatalytic process, where the holes accumulated in Bi₂WO₆ ultrathin nanosheets and O₂⁻ produced on metallic NPs synergistically promote the selective oxidation of aromatic alcohols.

由于多组分相互作用，用金属纳米颗粒（NPs）装饰的超薄半导体纳米片有望在光催化中发挥作用。合成了具有一系列固定在Bi ₂ WO ₆超薄纳米片上的单金属Pd和双金属Au-Pd NP的材料，并将其开发为光催化剂，用于将芳族醇选择性氧化为芳族醛。通过优化金属含量，典型的Au（0.25）Pd（0.25）-Bi ₂ WO ₆样品在所有制备的包括Au（0.5）-Bi ₂ WO ₆，Pd（x）-Bi的光催化剂中表现出最高的光催化活性。₂ WO ₆，Au（x）Pd（x）-Bi ₂ WO ₆（x表示光催化剂中金属的重量百分比），以及提高的生产苯甲醛的选择性。DRS光谱，光电化学测量表明，可见光范围内的吸收范围扩大，光生载流子的转移和分离效率更高，产生Au（0.25）Pd（0.25）-Bi ₂ WO ₆活性自由基的能力更强，和ESR检测。证明了活性物质对芳香醇的选择性氧化的影响遵循h ⁺  +  O ₂ ⁻  > h ⁺  >>  O的顺序。₂ ^- 。因此，基于双金属金钯纳米颗粒和Bi之间的界面合作的可能机制₂ WO _6个的超薄纳米片，提出了以示出光催化过程，其中，所述孔中的Bi积累₂ WO ₆的超薄纳米片和ö ₂ ^-产生于金属纳米颗粒协同促进芳香醇的选择性氧化。