摘要
一系列唯一的 nanowire 上层建筑， Cu2O nanowire polyhedra，通过一条划算的热水的线路被综合了。nanowire polyhedra 的三种类型，也就是 octahedra，凹面 octahedra，和昆虫，被面对羧基的酸与 o-anisidine 或 o-phenetidine 减少含铜的醋酸盐在高词法的收益(90%) 形成。这些 Cu2O nanowire polyhedra 的体系结构被电子显微镜学检验，它在多面的轮廓以内揭示了订的、高度排列的 Cu2O nanowires。Cu2O nanowire polyhedra 的生长被取向和被羧基的酸的增加调整的 nanowire 分支的生长率控制。比作样品在最近的文学报导了的 Cu2O， Cu2O nanowire octahedra 展览显著地在可见的光下面面对 H2O2 为染料降级提高了 photocatalytic 活动，可能，由于高密度的费用搬运人，从有他们的专辑的分叉的 nanowires 的 photoexcited 组织。另外，在当为染料的直接 photodegradation 的 H2O2 不在时的 Cu2O 的 photocatalytic 活动的最近的文学的讨论似乎可疑。
A series of unique nanowire superstructures, Cu2O nanowire polyhedra, have been synthesized through a cost-effective hydrothermal route. Three types of nanowire polyhedra, namely octahedra, concave octahedra, and hexapods, were formed in high morphological yields （90%） by reducing cupric acetate with o-anisidine or o-phenetidine in the presence of carboxylic acids. The architectures of these Cu2O nanowire polyhedra were examined by electron microscopy, which revealed ordered, highly aligned CU2O nanowires within the polyhedral outlines. The growth of the Cu2O nanowire polyhedra is controlled by the orientation and growth rates of the nanowire branches which are adjusted by addition of carboxylic acids. Compared to the Cu2O samples reported in the recent literature, the Cu2O nanowire octahedra exhibit notably enhanced photocatalytic activities for dye degradation in the presence of H202 under visible light, probably due to the high-density charge carriers photoexcited from the branched nanowires with their special structures. Additionally, the discussion in the recent literature of the photocatalytic activity of Cu2O in the absence of H2O2 for direct photodegradation of dyes seems questionable.
基金
This work was financially supported by the National Natural Science Foundation of China （No. 21071079）, the Research Fund of the State Key Laboratory of Materials-Oriented Chemical Engineering （2009）, and the Young Teachers Fund of Nanjing University of Technology.
