Nanogap engineered plasmon-enhancement in photocatalytic solar hydrogen conversion

doi:10.1002/admi.201500280

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/104587

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题名:	Nanogap engineered plasmon-enhancement in photocatalytic solar hydrogen conversion
作者:	Jie Chen;Chung-Li Dong;Yuan-Chang Du;Da-Ming Zhao;Shao-Hua Shen
关键词:	core–shell nanoparticles;photocatalysis;silver;urface modification;surface plasmon resonance
日期:	2015-09-22
上传时间:	2016-01-06 11:04:03 (UTC+8)
摘要:	Graphitic carbon nitride modified with plasmonic Ag@SiO2 core–shell nanoparticles (g-C3N4/Ag@SiO2) are proposed for enhanced photocatalytic solar hydrogen evolution under visible light. Nanosized gaps between the plasmonic Ag nanoparticles (NPs) and g-C3N4 are created and precisely modulated to be 8, 12, 17, and 21 nm by coating SiO2 shells on the Ag NPs. The optimized photocatalytic hydrogen production activity for g-C3N4/Ag@SiO2 is achieved with a nanogap of 12 nm (11.4 μmol h−1) to be more than twice as high as that of pure g-C3N4 (5.6 μmol h−1). The plasmon resonance energy transfer (PRET) effect of Ag NPs is innovatively proved from a physical view on polymer semiconductors for photoredox catalysis. The PRET effect favors the charge carrier separation by inducing electron–hole pairs efficiently formed in the near-surface region of g-C3N4. Furthermore, via engineering the width of the nanogap, the PRET and energy-loss Förster resonance energy transfer processes are perfectly balanced, resulting in considerable enhancement of photocatalytic hydrogen production activity over the g-C3N4/Ag@SiO2 plasmonic photocatalyst.
關聯:	Advanced Materials Interfaces 2(14), pp. 1500280
DOI:	10.1002/admi.201500280
显示于类别:	[物理學系暨研究所] 期刊論文

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