TiO2 包覆的 Au/Ag 纳米棒在可见光照射下具有增强的光催化活性。
TiO2 coated Au/Ag nanorods with enhanced photocatalytic activity under visible light irradiation.
机构信息
Department of Chemistry, National University of Singapore, Singapore 117543.
出版信息
Nanoscale. 2013 May 21;5(10):4236-41. doi: 10.1039/c3nr00517h.
A facile method was used to prepare uniform Au NR/TiO2 and Au/Ag NR/TiO2 core-shell composite nanoparticles. Au/Ag NR/TiO2 nanoparticles were found to display significantly enhanced visible light photo-catalytic activity compared to Au NR/TiO2 and the commercially available TiO2 nanoparticles. The enhancement mechanism was ascribed to injection of hot electrons of photo-excited Au/Ag NRs to TiO2, which was confirmed by 633 nm laser induced reduction of silver ions on the surface of Au/Ag NR/TiO2 composite nanoparticles.
一种简便的方法被用于制备均匀的 Au NR/TiO2 和 Au/Ag NR/TiO2 核壳复合纳米粒子。与 Au NR/TiO2 和市售的 TiO2 纳米粒子相比，Au/Ag NR/TiO2 纳米粒子显示出显著增强的可见光光催化活性。增强机制归因于光激发的 Au/Ag NRs 向 TiO2 注入热电子，这一点通过在 Au/Ag NR/TiO2 复合纳米粒子表面上用 633nm 激光诱导还原银离子得到证实。
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