Synthesis and their enhanced photoelectrochemical performance of ZnO nanoparticle-loaded CuO dandelion heterostructures under solar light
Synthesis and their enhanced photoelectrochemical performance of ZnO nanoparticle-loaded CuO dandelion heterostructures under solar light
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ZnO纳米颗粒负载CuO蒲公英异质结构的合成及其在太阳光下增强的光电化学性能
DOI：
10.1016/j.apsusc.2016.12.024
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发表时间：
2017-03-31
影响因子：
6.7
通讯作者：
Wang, Wenzhong
中科院分区：
文献类型：
--
作者：
Dong, Guanying;Du, Bin;Wang, Wenzhong
本文报道了一种简单、大规模的三维(3D)氧化锌纳米颗粒负载的CuO蒲公英(记为n-ZnO/p-CuO纳米颗粒/蒲公英)异质结构的合成及其在模拟太阳光照射下的光电化学(PEC)水分解。CuO蒲公英是通过一种简单而经济的化学方法制备的，即首先形成带状的CuO纳米片，然后组装成蒲公英状的结构。通过焙烧负载锌(Ac)(2)的CuO蒲公英，制备了负载纳米颗粒的CuO蒲公英异质结构。高分辨电子显微镜(HRTEM)研究表明，在p-CuO和n-ZnO界面之间建立了紧密的p-n结。N-ZnO/p-CuO纳米粒子/蒲公英光电极对PEC分解水的能力有显著的改善。研究了不同负载量的纳米氧化锌颗粒(NPs)的光电流随负载量的变化关系，其中负载量为4.6wt%的n-ZnO/p-CuO纳米颗粒/蒲公英异质结具有较高的光阴极电流。P型CuO和n型氧化锌界面之间紧密的p-n结驱动的光生电子和空穴的有效分离主要是由于光阳极电流的增强。本文的研究结果为设计高效、低成本的太阳能清洁制氢PEC电池的p-n结光电极提供了一种非常有用的策略。(C)2016爱思唯尔B.V.保留所有权利。
Here we report an easy and large-scale synthesis of three-dimensional (3D) ZnO nanoparticle-loaded CuO dandelion (denoted as n-ZnO/p-CuO nanoparticle/dandelion) heterostructures and their photoelectrochemical (PEC) water splitting under simulated solar light illumination. CuO dandelions were fabricated by a facile and cost-effective chemical strategy, in which the ribbon-like CuO nanoplates were first formed and then assembled into dandelion-like architectures. ZnO nanoparticle-loaded CuO dandelion heterostructures were fabricated by calcining Zn(Ac)(2)-loaded CuO dandelions. High resolution transmission electron microscope (HRTEM) studies demonstrate that intimate p-n junction is built between p-CuO and n-ZnO interface. The n-ZnO/p-CuO nanoparticle/dandelion photoelectrodes exhibit significant improvement in PEC water splitting to CuO dandelion photoelectrodes. The correlation between photocurrents and different loading contents of ZnO nanoparticles (NPs) is studied in which the n-ZnO/p-CuO nanoparticle/dandelion heterostructures with loading 4.6 wt% ZnO NPs show higher photocathodic current. The efficient separation of the photogenerated electrons and holes driven by the intimate p-n junction between p-type CuO and n-type ZnO interface is mainly contributed to the enhanced photoanode current. The achieved results in the present study offer a very useful strategy for designing p-n junction photoelectrodes for efficiency and low-cost PEC cells for clean solar hydrogen production. (C) 2016 Elsevier B.V. All rights reserved.