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<p>The practical application of Cu<sub>2</sub>O in the field of photoelectrocatalytic (PEC) hydrogen production has been limited by its relatively low photoconversion efficiency and electron mobility. Plasmonic metal nanoparticles have been utilized to enhance the charge separation of semiconductors through resonance energy transfer from metal nanoparticles to semiconductors. In this study, Ag nanosphere (Ag NS)@SiO<sub>2</sub> were combined with Cu<sub>2</sub>O to form triple core–shell nanocomposites, aiming to enhance the photoelectrochemical activity of Cu<sub>2</sub>O under visible-light irradiation. The microstructures of the Ag@SiO<sub>2</sub>@Cu<sub>2</sub>O nanocomposites were regulated by controlling the thickness of SiO<sub>2</sub> interlay and Cu<sub>2</sub>O shell in order to optimize the PEC efficiency. It was found that Ag NS@SiO<sub>2</sub> (5&#xa0;nm)@Cu<sub>2</sub>O (29&#xa0;nm) NCs exhibited the highest photocurrent intensity, showing 3.3 times, 11.9 times, and 17.8 times higher values than pure Cu<sub>2</sub>O, pure Ag NS, and AgNS@SiO<sub>2</sub> NPs respectively. Furthermore, the photoelectrocatalytic hydrogen production velocity of Ag NS@SiO<sub>2</sub> (5&#xa0;nm)@Cu<sub>2</sub>O (29&#xa0;nm) NCs was around 25&#xa0;mmol·g<sup>−1</sup>·h<sup>−1</sup>, which has been improved around 4.2 times compared to pure Cu<sub>2</sub>O. This enhanced performance is attributed to plasmon-induced resonance energy transfer from Ag metal nanoparticles to Cu<sub>2</sub>O semiconductor, which may improve the separation efficiency of electron–hole pairs and lead higher photoelectrocatalytic efficiency.</p> Graphic Abstract <p>The Ag NS@SiO<sub>2</sub> was integrated with Cu<sub>2</sub>O to form triple core–shell nanocomposites, aiming to enhance the photoelectrochemical activity of Cu<sub>2</sub>O under visible-light irradiation through plasmon-induced resonance energy transfer from Ag to Cu<sub>2</sub>O. And their photoelectrocatalytic performances were optimized by controlling the thickness of SiO<sub>2</sub> interlay and Cu<sub>2</sub>O shell. Ag NS@SiO<sub>2</sub> (5&#xa0;nm)@Cu<sub>2</sub>O (29&#xa0;nm) NCs exhibited superior photocurrent intensity and enhanced photoelectrocatalytic hydrogen production rate compared to pure Cu<sub>2</sub>O.</p>

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Optimizing the Photoelectrocatalytic Performance of Ag NS@SiO2@Cu2O Nanocomposites Through Microstructural Tuning Based on the Plasmonic Induced Resonance Energy Transfer

  • 期刊论文

  • 发表日期：

    2025年2月17日

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  • Xiuqing Wang,
  • Ruiyao Yan,
  • Jianyu Fu,
  • Yan He,
  • Jiahuan Zheng,
  • Liu Liu,
  • Na Zhou

摘要

The practical application of Cu2O in the field of photoelectrocatalytic (PEC) hydrogen production has been limited by its relatively low photoconversion efficiency and electron mobility. Plasmonic metal nanoparticles have been utilized to enhance the charge separation of semiconductors through resonance energy transfer from metal nanoparticles to semiconductors. In this study, Ag nanosphere (Ag NS)@SiO2 were combined with Cu2O to form triple core–shell nanocomposites, aiming to enhance the photoelectrochemical activity of Cu2O under visible-light irradiation. The microstructures of the Ag@SiO2@Cu2O nanocomposites were regulated by controlling the thickness of SiO2 interlay and Cu2O shell in order to optimize the PEC efficiency. It was found that Ag NS@SiO2 (5 nm)@Cu2O (29 nm) NCs exhibited the highest photocurrent intensity, showing 3.3 times, 11.9 times, and 17.8 times higher values than pure Cu2O, pure Ag NS, and AgNS@SiO2 NPs respectively. Furthermore, the photoelectrocatalytic hydrogen production velocity of Ag NS@SiO2 (5 nm)@Cu2O (29 nm) NCs was around 25 mmol·g−1·h−1, which has been improved around 4.2 times compared to pure Cu2O. This enhanced performance is attributed to plasmon-induced resonance energy transfer from Ag metal nanoparticles to Cu2O semiconductor, which may improve the separation efficiency of electron–hole pairs and lead higher photoelectrocatalytic efficiency.

Graphic Abstract

The Ag NS@SiO2 was integrated with Cu2O to form triple core–shell nanocomposites, aiming to enhance the photoelectrochemical activity of Cu2O under visible-light irradiation through plasmon-induced resonance energy transfer from Ag to Cu2O. And their photoelectrocatalytic performances were optimized by controlling the thickness of SiO2 interlay and Cu2O shell. Ag NS@SiO2 (5 nm)@Cu2O (29 nm) NCs exhibited superior photocurrent intensity and enhanced photoelectrocatalytic hydrogen production rate compared to pure Cu2O.