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首页> 外文期刊>Nanotechnology >Ultra rapid direct heating synthesis of ZnO nanorods with improved light trapping from stacked photoanodes for high efficiency photocatalytic water splitting
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Ultra rapid direct heating synthesis of ZnO nanorods with improved light trapping from stacked photoanodes for high efficiency photocatalytic water splitting

机译：ZnO纳米棒的超快速直接加热合成堆积覆盖的高效光催化水分裂

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摘要

An ultra rapid growth method for vertically aligned ZnO nanorod (NR) thin films on metal meshes was developed using a direct heating synthesis technique. A typical NR growth rate of 10 mu mh(-1) was achieved. The effects of the applied heating power and growth duration on the morphologies of ZnO nanostructures were examined. High density surface defects were formed on the ZnO NRs, which is responsible for slow charge recombination and high efficiency in the photoelectrochemical (PEC) water splitting process. The light absorption for a photoanode was significantly improved by light trapping using a 3D stacked metal mesh photoanode structure. With the internal reflection between the stacked photoanodes, the final light leakage is minimised. The light absorption in the stacked photoanode is improved without restricting the charge transportation. In comparison with a single mesh photoanode and a chemical bath deposition grown flat photoanode, the PEC water splitting efficiency from the stacked photoanode was increased by a factor of 2.6 and 6.1 respectively.
机译：使用直接加热合成技术开发了金属网上垂直对准ZnO纳米棒（NR）薄膜的超快速生长方法。实现了10μmH（-1）的典型NR生长速率。检查了应用的加热功率和生长持续时间对ZnO纳米结构形态的影响。在ZnO NR上形成高密度表面缺陷，其负责光电子化学（PEC）水分裂过程中的慢电荷重组和高效率。通过使用3D堆叠金属网光电亮结构，光捕获显着改善了光电磁极的光吸收。通过堆叠光电池之间的内部反射，最终漏光最小化。堆叠的光电码中的光吸收得到改善而不限制电荷运输。与单网电极和化学浴沉积生长的平面光电码相比，来自堆叠光电码的PEC水分解效率分别增加了2.6和6.1系数。

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