Engineering Science Programme, National University of Singapore, 9 Science Drive 1, Singapore 117576.
Nanoscale. 2013 Jan 21;5(2):759-64. doi: 10.1039/c2nr33004k. Epub 2012 Dec 10.
Here we have demonstrated the preparation of high-quality, monodispersed and tunable phases of Cu nanoparticles. Structural and chemical composition studies depict the evolution of Cu-Cu(2)O-CuO nanoparticles at various process stages. The loading of Cu and Cu oxide nanoparticles on TiO(2) catalyst has enhanced the photocatalytic H(2) production. Comparatively, H(2) treatment produces well-dispersed Cu nanoparticles with thin oxide shells that show the highest H(2) production amongst the samples. The relatively higher photocatalytic performance is deemed to result from reduced structural defects, higher surface area and dispersivity as well as favorable charge transfer, which inhibits recombination. The Cu nanoparticles are shown to be a promising alternative to noble metal-loaded TiO(2) catalyst systems due to their low cost and high performance in photocatalytic applications.
在这里，我们展示了高质量、单分散和可调谐的 Cu 纳米粒子的制备。结构和化学组成研究描述了在不同工艺阶段 Cu-Cu(2)O-CuO 纳米粒子的演变。Cu 和 Cu 氧化物纳米粒子在 TiO(2)催化剂上的负载提高了光催化产氢性能。相比之下，H(2)处理生成具有薄氧化物壳的分散良好的 Cu 纳米粒子，在样品中表现出最高的 H(2)产率。相对较高的光催化性能被认为是由于结构缺陷减少、更高的比表面积和分散性以及有利的电荷转移，从而抑制了复合。由于其低成本和在光催化应用中的高性能，Cu 纳米粒子被认为是负载贵金属的 TiO(2)催化剂体系的一种有前途的替代品。
