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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Improved CdS photocatalytic H(2)evolution using Au-Ag nanoparticles with tunable plasmon-enhanced resonance energy transfer
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Improved CdS photocatalytic H(2)evolution using Au-Ag nanoparticles with tunable plasmon-enhanced resonance energy transfer

机译：使用可调谐等离子体增强的共振能量转移使用Au-Ag纳米粒子改善Cds光催化H（2）演化

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摘要

Plasmon-mediated photocatalytic systems often suffer from weak absorption spectra overlap which limits energy transfer between plasmon metals and semiconductors. Herein, Au-Ag-x@CdS(90)nanoparticles (NPs) with adjustable spectral overlap were prepared. Au-Ag hollow nanoparticles (HNPs) with tunable plasmon absorption peaks were used as the template and were coated with CdS to achieve stepwise spectral overlap for enhanced energy transfer. As the spectral overlap increased between Au-Ag HNPs and CdS, the H(2)evolution rate increased and then decreased. Under visible-light irradiation, Au-Ag-487@CdS(90)nanoparticles (NPs) delivered an H(2)evolution rate of 18.73 mmol h(-1)g(-1), which was 2.2 times higher than pure CdS. The plasmon resonance energy transfer from Au-Ag HNPs to the CdS semiconductor increased the generation of charge carriers in the semiconductor and enhanced the photocatalytic performance. By regulating the position of the plasmon absorption peaks of the noble metal nanoparticles, changing the spectral overlap between metal and semiconductor to enhance the PRET effect is beneficial to the design of new plasmon photocatalysts.
机译：等离子体介导的光催化系统通常遭受弱吸收光谱重叠，其限制了等离子体金属和半导体之间的能量转移。在此，制备具有可调节光谱重叠的Au-Ag-X @ Cds（90）纳米颗粒（NPS）。使用可调谐等离子体吸收峰的Au-Ag中空纳米颗粒（HNP）用作模板，并用CD涂覆以实现逐步光谱重叠以提高能量转印。随着AU-AG HNP和CD之间的光谱重叠增加，H（2）的演化率增加，然后减少。在可见光照射下，Au-Ag-487 @ Cds（90）纳米颗粒（NPS）递送18.73mmol H（-1）G（-1）的H（2）进化率，其比纯CD高2.2倍。从AU-AG HNP到CDS半导体的等离子体共振能量转移增加了半导体中的电荷载体的产生，并增强了光催化性能。通过调节贵金属纳米颗粒的等离子体吸收峰的位置，改变金属和半导体之间的光谱重叠以增强预采样对新的等离子体光催化剂的设计有益。

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