Yoshinaga Masaki, Takahashi Hideyuki, Yamamoto Katsutoshi, Muramatsu Atsushi, Morikawa Takeshi
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
J Colloid Interface Sci. 2007 May 1;309(1):149-54. doi: 10.1016/j.jcis.2007.01.051.
Metallic Ni nanoparticles were successfully prepared on the surface of titania thin film substrate by a novel method, named as chemical vapor reductive deposition (CVRD) method. The growth of the nanoparticles was based on the specific adsorption and heterogeneous nucleation on the surface of substrate, not via vapor-phase formation and subsequent sedimentation. The nanoparticle size was found to be well controllable between 10 and 30 nm by the preparation time and vapor pressure of metal complex precursor. ESCA and electron diffraction results clearly demonstrated Ni nanoparticles as metallic. Titania thin film with metallic Ni nanoparticles on its surface showed high efficiency in their photocatalysis of hydrogen evolution from decomposition of ethanol.
通过一种名为化学气相还原沉积（CVRD）的新方法，在二氧化钛薄膜基底表面成功制备了金属镍纳米颗粒。纳米颗粒的生长基于基底表面的特定吸附和异质成核，而非通过气相形成和随后的沉降。通过金属络合物前驱体的制备时间和蒸气压，发现纳米颗粒尺寸在10至30纳米之间可得到良好控制。光电子能谱（ESCA）和电子衍射结果清楚地证明镍纳米颗粒为金属性的。表面带有金属镍纳米颗粒的二氧化钛薄膜在光催化乙醇分解制氢方面表现出高效率。
