Porous, peanut-shaped BiVO₄ was prepared and further decorated with palladium nanoparticles on its surface using a photodeposition approach. The well-dispersed palladium nanoparticles were found to suppress photogenerated charge carriers, and may also improve the capacity of BiVO₄ to harvest visible light photons due to a local surface plasmon resonance effect. The prepared Pd–BiVO₄ composites exhibited excellent photocatalytic activity in the degradation of phenol under visible light irradiation. This performance rivaled that of TiO₂ under UV light. However, the active oxidants in Pd–BiVO₄ and TiO₂ processes are different, with photogenerated holes in BiVO₄ photocatalysis and OH radicals in TiO₂ photocatalysis. Furthermore, different mechanisms and different pathways for the degradation of phenol under the effects of different oxidants were proposed. This work not only opens up new possibilities for the efficient removal of phenolic compounds in wastewater via visible-light-driven photocatalysis in the presence of a Pd–BiVO₄ composite, but also suggests that OH radicals may not be the most important oxidants in all photocatalysis processes.

制备多孔的花生状BiVO ₄，并使用光沉积法在其表面进一步用钯纳米粒子装饰。发现分散良好的钯纳米颗粒可抑制光生电荷载流子，并且由于局部表面等离子体激元共振效应，还可以提高BiVO ₄收集可见光光子的能力。制备的Pd-BiVO ₄复合材料在可见光照射下对苯酚的降解表现出优异的光催化活性。在紫外光下，该性能可与TiO ₂媲美。但是，Pd–BiVO ₄和TiO ₂过程中的活性氧化剂不同，BiVO _4中存在光生空穴TiO ₂光催化中的光催化和OH自由基。此外，提出了在不同氧化剂作用下苯酚降解的不同机理和途径。这项工作不仅为在Pd-BiVO ₄复合材料存在下通过可见光驱动的光催化有效去除废水中的酚类化合物开辟了新的可能性，而且表明OH自由基可能不是所有化合物中最重要的氧化剂。光催化过程。