Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
Langmuir. 2012 Feb 28;28(8):3938-44. doi: 10.1021/la2043526. Epub 2012 Feb 15.
A novel strategy was designed to prepare Ag cluster-doped TiO(2) nanoparticles (Ag/TiO(2) NPs) without addition of any chemical reducing agent and/or organic additive. A defect-rich TiO(x) species was generated by laser ablation in liquid (LAL) of a Ti target. The silver ions could be reduced and deposited on the surface of TiO(2) NPs through the removal of oxygen vacancies and defects; the TiO(x) species evolved into anatase NPs in a hydrothermal treatment process. The derived Ag/TiO(2) NPs are approximately 25 nm in size, with narrow size distribution. The Ag clusters are highly dispersed inside TiO(2) and less than 3 nm in size. The doped amount can be tuned by changing the concentration of Ag(+) ions. The as-synthesized Ag/TiO(2) NPs display improved photocatalytic efficiency toward pentachlorophenol (PCP) degradation.
设计了一种新策略来制备 Ag 团簇掺杂的 TiO(2) 纳米颗粒（Ag/TiO(2) NPs），无需添加任何化学还原剂和/或有机添加剂。通过钛靶的液体激光烧蚀（LAL）产生富含缺陷的 TiO(x) 物质。通过去除氧空位和缺陷，银离子可以被还原并沉积在 TiO(2) NPs 的表面上；TiO(x) 物质在水热处理过程中演变成锐钛矿 NPs。所得的 Ag/TiO(2) NPs 大小约为 25nm，具有较窄的尺寸分布。Ag 团簇在 TiO(2) 中高度分散，尺寸小于 3nm。通过改变 Ag(+)离子的浓度可以调整掺杂量。合成的 Ag/TiO(2) NPs 对五氯苯酚（PCP）降解的光催化效率得到了提高。
