Yuan Lan, Weng Bo, Colmenares Juan Carlos, Sun Yugang, Xu Yi-Jun
State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China.
College of Chemistry, New Campus, Fuzhou University, Fuzhou, 350116, P. R. China.
Small. 2017 Dec;13(48). doi: 10.1002/smll.201702253. Epub 2017 Oct 17.
Promising semiconductor-based photocatalysis toward achieving efficient solar-to-chemical energy conversion is an ideal strategy in response to the growing worldwide energy crisis, which however is often practically limited by the insufficient photoinduced charge-carrier separation. Here, a rational cascade engineering of Au nanoparticles (NPs) decorated 2D/2D Bi WO -TiO (B-T) binanosheets to foster the photocatalytic efficiency through the manipulated flow of multichannel-enhanced charge-carrier separation and transfer is reported. Mechanistic characterizations and control experiments, in combination with comparative studies over plasmonic Au/Ag NPs and nonplasmonic Pt NPs decorated 2D/2D B-T composites, together demonstrate the cooperative synergy effect of multiple charge-carrier transfer channels in such binanosheets-based ternary composites, including Z-scheme charge transfer, "electron sink," and surface plasmon resonance effect, which integratively leads to the boosted photocatalytic performance.
有前景的基于半导体的光催化技术，旨在实现高效的太阳能到化学能的转换，这是应对全球日益严重的能源危机的理想策略，然而，实际中它常常受到光生载流子分离不足的限制。在此，报道了一种合理的级联工程，即通过修饰金纳米颗粒（NPs）的二维/二维BiWO₄-TiO₂（B-T）双纳米片，利用多通道增强的载流子分离和转移的可控流动来提高光催化效率。机理表征和对照实验，结合对等离子体金/银纳米颗粒和非等离子体铂纳米颗粒修饰的二维/二维B-T复合材料的对比研究，共同证明了这种基于双纳米片的三元复合材料中多个载流子转移通道的协同效应，包括Z型电荷转移、“电子阱”和表面等离子体共振效应，这些效应共同导致了光催化性能的提高。
