Improved photoelectrochemical response of CuWO4/BiOI p-n heterojunction embedded with plasmonic Ag nanoparticles
Improved photoelectrochemical response of CuWO4/BiOI p-n heterojunction embedded with plasmonic Ag nanoparticles
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DOI：
10.1016/j.cej.2019.03.193
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发表时间：
2019-08
影响因子：
15.1
通讯作者：
Miaoxin Zhou;Zhengang Guo;Q. Song;Xifei Li;Zhifeng Liu
中科院分区：
文献类型：
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作者：
Miaoxin Zhou;Zhengang Guo;Q. Song;Xifei Li;Zhifeng Liu
我们首先设计并制作了一种用于光电化学分解水的高效集成CuWO4/Ag/BiOI器件。在该系统中，CuWO4/BiOI之间p-n异质结的形成促进了载流子的分离和通过内置电场的输运。同时，银纳米粒子具有表面等离子体共振(SPR)效应，通过热电子转移(HET)和等离子体共振能量转移(PRET)将能量传递给金属氧化物，从而提高了纳米银的光电化学活性。正如预期的那样，这种新型的三元CuWO4/Ag/BiOI结构在1.23 V处显示出2.10 mA/cm2的光电流，与RHE相比，光电化学分解水的光电流显著提高，高于裸CuWO4的光电流。因此，这项工作可以为p-n异质结和等离子激元协同增强光电化学分解水提供一条途径。
We first design and fabricate a highly efficient integrated CuWO4/Ag/BiOI device for photoelctrochemical water splitting. In this system, the formation of a p-n heterojunction between CuWO4/BiOI facilitates the carriers separation and transportation through built-in electrical field. Meanwhile, the Ag nanoparticles (NPs) own surface plasmon resonance (SPR), which increase the photoelectrochemical activity by transfer energy to metal oxides via hot electrons transfer (HET) and plasmon resonant energy transfer (PRET). As expected, this novel ternary CuWO4/Ag/BiOI structure reveals a dramatically promoted photocurrent of 2.10 mA/cm2at 1.23 V vs. RHE in photoelctrochemical water splitting, which is higher than that of bare CuWO4. Hence, this work may provide an avenue guidelines for p-n heterojunction and plasmon synergistically enhance photoelctrochemical water splitting.