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    題名: 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
    關鍵詞: core–shell nanoparticles;photocatalysis;silver;urface modification;surface plasmon resonance
    日期: 2015-09-22
    上傳時間: 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
    顯示於類別:[物理學系暨研究所] 期刊論文

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