利用金/银核/壳纳米棒增强 Pt/n-Si/Ag 光电二极管的光催化活性
Plasmonic enhancements of photocatalytic activity of Pt/n-Si/Ag photodiodes using Au/Ag core/shell nanorods.
机构信息
Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
出版信息
J Am Chem Soc. 2011 Oct 26;133(42):16730-3. doi: 10.1021/ja204383q. Epub 2011 Oct 4.
Abstract
We report the plasmonic enhancement of the photocatalytic properties of Pt/n-Si/Ag photodiode photocatalysts using Au/Ag core/shell nanorods. We show that Au/Ag core/shell nanorods can be synthesized with tunable plasmon resonance frequencies and then conjugated onto Pt/n-Si/Ag photodiodes using well-defined chemistry. Photocatalytic studies showed that the conjugation with Au/Ag core/shell nanorods can significantly enhance the photocatalytic activity by more than a factor of 3. Spectral dependence studies further revealed that the photocatalytic enhancement is strongly correlated with the plasmonic absorption spectra of the Au/Ag core/shell nanorods, unambiguously demonstrating the plasmonic enhancement effect.
摘要
我们使用 Au/Ag 核/壳纳米棒报告了 Pt/n-Si/Ag 光电二极管光催化剂的光催化性能的等离子体增强。我们表明，可以使用可调谐等离子体共振频率合成 Au/Ag 核/壳纳米棒，然后使用明确定义的化学方法将其共轭到 Pt/n-Si/Ag 光电二极管上。光催化研究表明，与 Au/Ag 核/壳纳米棒的共轭可以使光催化活性显著提高 3 倍以上。光谱依赖性研究进一步表明，光催化增强与 Au/Ag 核/壳纳米棒的等离子体吸收光谱强烈相关，明确证明了等离子体增强效应。
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