A Facile Top-Down Etching To Create a Cu2O Jagged Polyhedron Covered with Numerous {110} Edges and {111} Corners with Enhanced Photocatalytic Activity
A Facile Top-Down Etching To Create a Cu2O Jagged Polyhedron Covered with Numerous {110} Edges and {111} Corners with Enhanced Photocatalytic Activity
复制标题
一种简便的自上而下蚀刻，创建覆盖有许多{110}边缘和{111}角的Cu2O锯齿状多面体，具有增强的光催化活性
DOI：
10.1002/chem.201201882
复制
发表时间：
2012-11-01
影响因子：
4.3
通讯作者：
Yang, Shihe
中科院分区：
文献类型：
--
作者：
Shang, Yang;Sun, Du;Yang, Shihe
由于具有与面相关的光学、电学、磁学和催化性质，合成具有明确小面的金属或金属氧化物纳米晶已被广泛研究。[1-3]在过去的二十年中，能够从原子水平生长和设计纳米晶的“自下而上”概念一直被主导以合成具有优异性能的新的纳米结构。[5-8]然而，它经常需要表面活性剂或有毒的溶剂，有时需要在高温下反应，这具有环境污染和高成本的缺点。此外，一些复杂的结构不能通过这种路线产生。将物理学中发展得很好的所谓自上而下的工程[9]应用于反应体系是一种趋势。使用这种方法将有助于实现非传统的纳米晶体结构，这是以前在温和条件下使用非常简单的程序很难实现的。例如，精细的表面处理，如表面选择性刻蚀，已经被用来有效地产生复杂的纳米晶并优化其性能。[10-12]Chen等人[13]报道了一种通过氢化在纳米相二氧化钛的表面产生无序的无序工程，该无序在纳米相二氧化钛的表面显示出大量的太阳能驱动的光催化活性。更具挑战性的是将脸部的大小减少到纳米级，因为所有报道的结果都只实现了微米级的多面体。
The synthesis of metal or metal oxide nanocrystals with well-defined facets has been extensively studied because of the facet-dependent optical, electronic, magnetic, and catalytic properties.[1–3] During the last two decades, a “bottomup” concept that enables nanocrystals growth and design from atomic level [4] has long been dominated to synthesize new nanostructures with excellent properties.[5–8] However, it often requires surfactants or toxic solvent, and sometimes needs to react at a high temperature, which has the disadvantages of environmental pollution and high costs. Furthermore, some complex structures could not be produced through this route.There is a trend to apply the so-called “top-down” engineering [9] that has been well developed in physics to reaction system. Using this method would help to realize unconventional architectures of nanocrystals, which were previously hard to achieve when using a very facile procedure under mild conditions. For example, delicate surface retreatment such as surface selective etching has been employed to effectively generate sophisticated nanocrystals and optimize their properties.[10–12] Chen et al.[13] report a disorder-engineering through hydrogenation to produce disorder in the surface layers of nanophase TiO2 that exhibit substantial solar-driven photocatalytic activities. Even more challenging is to reduce the size of the face to nanometers, since all the reported results only achieved a polyhedral in the micro-