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Facile synthesis of ZnO nanoparticles on carol-like Cu 2 O nanowires for photoelectrochemical hydrogen generation
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2017-12-01 , DOI: 10.1016/j.jallcom.2017.09.174
Ying-Chu Chen , Yu-Chen Chang , Yu-Kuei Hsu

Abstract A simple chemical route is utilized to decorate ZnO nanoparticles (NP) on the coral-like Cu2O nanowires (NW) surface as a p-n heterojunction photocathode for photoelectrochemical (PEC) hydrogen production. The SEM and TEM results confirm the morphology and structure of coral-like Cu2O NW/ZnO NP nanocomposite; meanwhile, the EDS and XPS results display the chemical binding and composition of Cu2O and ZnO materials. Electrochemical impedance measurements demonstrate that the coral-like Cu2O NW/ZnO NP achieves fast charge transfer. Notably, the p-Cu2O NW/n-ZnO NP photocathode can achieve the highest photocurrent of −3.4 mAcm−2 and its IPCE values significantly show the 1.5-fold enhancement compared to pristine p-Cu2O NW, ascribing the efficient separation efficiency of photogenerated electron-hole pairs and greater PEC activity.

中文翻译:

在 Carol 类 Cu 2 O 纳米线上轻松合成 ZnO 纳米颗粒用于光电化学产氢

摘要 利用简单的化学途径在珊瑚状 Cu2O 纳米线 (NW) 表面装饰 ZnO 纳米粒子 (NP) 作为 pn 异质结光电阴极用于光电化学 (PEC) 制氢。SEM和TEM结果证实了珊瑚状Cu2O NW/ZnO NP纳米复合材料的形态和结构;同时,EDS 和 XPS 结果显示了 Cu2O 和 ZnO 材料的化学结合和成分。电化学阻抗测量表明珊瑚状的 Cu2O NW/ZnO NP 实现了快速的电荷转移。值得注意的是,p-Cu2O NW/n-ZnO NP 光电阴极可以实现 -3.4 mAcm-2 的最高光电流,其 IPCE 值与原始 p-Cu2O NW 相比显着提高了 1.5 倍,这归因于光生的高效分离效率。电子-空穴对和更大的 PEC 活性。
更新日期:2017-12-01
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