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The dual role of Au nanoparticles in the surface plasmon resonance enhanced photocatalyst Au/g-C3N4
发布时间：2023-10-19点击次数：
- 关键字：H-2 EVOLUTION; METAL; WATER; GROWTH; G-C3N4; SIZE
- 摘要：Gold nanoparticles (Au NPs) are widely utilized to broaden the light absorption of the photocatalysts due to their localized surface plasmon resonance (LSPR). However, the photocatalytic mechanism of Au/photocatalyst heterostructure involving charges transfer and reactive sites is still in dispute. Here, we synthesized a typical system Au/graphite carbon nitride (g-C3N4) and demonstrate that the role of Au NPs in the LSPR enhanced photo catalysis. Under visible light, the photoexcited electrons of g-C3N4 would transfer to Au NPs and reduce protons into hydrogen together with hot electrons of Au NPs. The hot holes of Au NPs would flow to g-C3N4 and oxidize triethanolamine. Therefore, the Au NPs play a dual role, plasma, and cocatalyst, in the LSPR enhanced photo catalyst. When lambda > 420 nm, Au /g-C3N4 has hydrogen production of 159.9 mu mol g(-1) h(-1). Our findings confirm the significance of metal plasma in photocatalytic reaction and benefit designing photocatalysts with boosting performance.
- 卷号：48
- 期号：
- 是否译文：否