Department of Chemistry, School of Science, Tokyo Institute of Technology , 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
Suzukakedai Materials Analysis Division, Technical Department, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.
ACS Appl Mater Interfaces. 2017 Feb 22;9(7):6114-6122. doi: 10.1021/acsami.6b15804. Epub 2017 Feb 7.
The structure of cobalt oxide (CoO) nanoparticles dispersed on rutile TiO (R-TiO) was characterized by X-ray diffraction, UV-vis-NIR diffuse reflectance spectroscopy, high-resolution transmission electron microscopy, X-ray absorption fine-structure spectroscopy, and X-ray photoelectron spectroscopy. The CoO nanoparticles were loaded onto R-TiO by an impregnation method from an aqueous solution containing Co(NO)·6HO followed by heating in air. Modification of the R-TiO with 2.0 wt % Co followed by heating at 423 K for 1 h resulted in the highest photocatalytic activity with good reproducibility. Structural analyses revealed that the activity of this photocatalyst depended strongly on the generation of CoO nanoclusters with an optimal distribution. These nanoclusters are thought to interact with the R-TiO surface, resulting in visible light absorption and active sites for water oxidation.
采用浸渍法将 Co(NO)·6HO 的水溶液负载到锐钛矿 TiO（R-TiO）上，然后在空气中加热，制备了负载在 R-TiO 上的氧化钴（CoO）纳米粒子。通过 X 射线衍射、紫外可见近红外漫反射光谱、高分辨率透射电子显微镜、X 射线吸收精细结构光谱和 X 射线光电子能谱对 CoO 纳米粒子的结构进行了表征。在空气中加热。结果表明，负载 2.0wt%Co 并在 423K 下加热 1h 的 R-TiO 具有最高的光催化活性和良好的重现性。结构分析表明，该光催化剂的活性强烈依赖于具有最佳分布的 CoO 纳米团簇的生成。这些纳米团簇被认为与 R-TiO 表面相互作用，导致可见光吸收和水氧化的活性位。
