Piezo-potential enhanced photocatalytic degradation of organic dye using ZnO nanowires

Piezo-potential enhanced photocatalytic degradation of organic dye using ZnO nanowires
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使用 ZnO 纳米线压电势增强有机染料的光催化降解

DOI:
10.1016/j.nanoen.2015.02.029
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发表时间:
2015-04
期刊:
影响因子:
17.6
通讯作者:
Zhonglin Wang
Zhonglin Wang
中科院分区:
材料科学1区
文献类型:
--
作者:
Xinyu Xue;Weili Zang, Ping Deng, Qi Wang, Lili Xing, Yan Zhang;Zhonglin Wang

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压电半导体,如纤锌矿结构的ZnO、GaN和InN,具有压电和半导体耦合的新特性。压电场是通过施加应变在ZnO纳米线内部产生的。在压电场的驱动下,光产生的电子和空穴将被分离。通过压电驱动的光生成载体分离,提高了ZnO纳米线降解亚甲基蓝的光催化活性。结合ZnO纳米线的压电和光催化性能,揭示了降解有机染料的一种新的基本机制。
Piezoelectric semiconductors, such as wurtzite structure ZnO, GaN, and InN, have novel properties of coupling of piezoelectric and semiconductor. The piezoelectric field is created inside ZnO nanowires by applying strain. The photo-generated electrons and holes will be separated under the driving of piezoelectric field. The photocatalytic activity of ZnO nanowires for degrading methylene blue has been enhanced by the piezoelectric-driven separation of photo-generated carriers. Coupling the piezoelectric and photocatalytic properties of ZnO nanowires, a new fundamental mechanism for the degradation of organic dye has been demonstrated.
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