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Effective electron collection in highly (110)-oriented ZnO porous nanosheet framework photoanode

机译：在高度（110）取向的ZnO多孔纳米片框架光阳极中有效收集电子

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摘要

A highly (110)- oriented ZnO porous nanosheet framework is designed as the photoanode in photoelectrochemical systems, by virtue of its anisotropic electronic properties. It can be facilely prepared in large scale via a hydrothermal method. X-ray diffraction (XRD) analyses show that the orientation index of the (110) diffraction plane is 3.54, indicating the films possess (110) preferred orientation. Field-emission scanning electron microscope (FE-SEM) images exhibit that most of the nanosheets stand nearly perpendicularly on the substrate. The {002} lattice planes work just like conducting wires and induce the electrons to transport to the substrate. Chronoamperometry measurement demonstrates an effective electron collection. When the nanostructured photoanode is introduced to dye-sensitized solar cells, a conversion efficiency of 3.7% is obtained. The photoanode also has potential application in the other photoelectrochemical systems, such as photocatalytical splitting of water.
机译：由于其各向异性的电子特性，将高度（110）取向的ZnO多孔纳米片框架设计为光电化学系统中的光阳极。可以通过水热法容易地大规模制备。 X射线衍射（XRD）分析表明（110）衍射面的取向指数为3.54，表明膜具有（110）优选取向。场发射扫描电子显微镜（FE-SEM）图像显示出，大多数纳米片几乎垂直地站立在基板上。 {002}晶格平面就像导线一样工作，并感应电子传输到基板。计时电流法测量表明有效的电子收集。当将纳米结构的光阳极引入染料敏化太阳能电池时，可获得3.7％的转化效率。光电阳极在其他光电化学系统中也具有潜在的应用，例如水的光催化分解。

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