Wei Yunwei, Shahid Malik Zeeshan, Lyu Shujuan, Sun Weiying, Lyu Shuqiang
Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University Dezhou 253023 Shandong P. R. China
School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China.
RSC Adv. 2021 Jun 28;11(37):22618-22624. doi: 10.1039/d1ra02958d. eCollection 2021 Jun 25.
Au/Pd/ZnO nanoclusters with ultra-low noble metal loadings were prepared by a one-step and ligand-free method at room temperature. HRTEM, ICP-MS, XPS, and elemental mapping analysis confirmed that the obtained Au/Pd/ZnO nanoclusters were composed of ZnO nanoclusters decorated with well-dispersed AuPd nanoparticles. Au/Pd/ZnO nanoclusters exhibited higher photocatalytic activity compared with those of pristine ZnO, Au/ZnO and Pd/ZnO. Moreover, the high catalytic activity of Au/Pd/ZnO nanoclusters could be maintained even after 5 cycles of photocatalytic reaction. A mechanism for the enhanced photocatalytic performance was also suggested, which was in light of the synergistic effects of the SPR effect from Au and the improved photogenerated charge carrier separation from Pd.
通过室温下一步法且无配体的方法制备了具有超低贵金属负载量的Au/Pd/ZnO纳米团簇。高分辨透射电子显微镜（HRTEM）、电感耦合等离子体质谱（ICP-MS）、X射线光电子能谱（XPS）和元素映射分析证实，所制备的Au/Pd/ZnO纳米团簇由负载有分散良好的AuPd纳米颗粒的ZnO纳米团簇组成。与原始ZnO、Au/ZnO和Pd/ZnO相比，Au/Pd/ZnO纳米团簇表现出更高的光催化活性。此外，即使经过5次光催化反应循环后，Au/Pd/ZnO纳米团簇仍能保持高催化活性。还提出了光催化性能增强的机制，这是基于Au的表面等离子体共振（SPR）效应与Pd改善光生电荷载流子分离的协同作用。
