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用于太阳能燃料生产的金和二氧化钛纳米颗粒多层等离子体异质结构

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production.

作者信息

Kim Jeonga, Son Ho Yeon, Nam Yoon Sung

机构信息

Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.

KAIST Institute for the NanoCentury, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.

出版信息

Sci Rep. 2018 Jul 11;8(1):10464. doi: 10.1038/s41598-018-28789-w.

DOI:10.1038/s41598-018-28789-w
PMID:29993015
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6041279/
Abstract

Solar fuel production via photoelectrochemical (PEC) water splitting has attracted great attention as an approach to storing solar energy. However, a wide range of light-harvesting materials is unstable when exposed to light and oxidative conditions. Here we report a robust, multilayered plasmonic heterostructure for water oxidation using gold nanoparticles (AuNPs) as light-harvesting materials via localized surface plasmon resonance (LSPR). The multilayered heterostructure is fabricated using layer-by-layer self-assembly of AuNPs and TiO nanoparticles (TNPs). Plasmon-induced hot electrons are transferred from AuNPs to TNPs over the Au/TiO Schottky barrier, resulting in charge separation of hot carriers. Plasmonic photoanodes for water oxidation are completed by incorporating a Co-based oxygen-evolving catalyst on the multilayered heterostructure to scavenge hot holes. Light absorption capability and PEC properties of the photoanodes are investigated as a function of the number of AuNP/TNP bilayers. The PEC properties exhibits dependence on the number of the bilayers, which is affected by charge transport within the multilayered heterostructures. Photocurrent density and decrease in impedance by irradiation indicates significant photoactivity by LSPR excitation.

摘要

通过光电化学（PEC）水分解来生产太阳能燃料作为一种储存太阳能的方法已引起了广泛关注。然而，多种光捕获材料在光照和氧化条件下不稳定。在此，我们报道了一种坚固的多层等离子体异质结构，该结构使用金纳米颗粒（AuNP）作为光捕获材料，通过局域表面等离子体共振（LSPR）来进行水氧化。多层异质结构是通过AuNP和TiO纳米颗粒（TNP）的逐层自组装制备而成。等离子体诱导的热电子通过Au/TiO肖特基势垒从AuNP转移到TNP，从而导致热载流子的电荷分离。通过在多层异质结构上引入基于Co的析氧催化剂来清除热空穴，从而完成用于水氧化的等离子体光阳极。研究了光阳极的光吸收能力和PEC性质随AuNP/TNP双层数的变化。PEC性质表现出对双层数的依赖性，这受到多层异质结构内电荷传输的影响。光电流密度以及光照下阻抗的降低表明通过LSPR激发具有显著的光活性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/133e7833c41c/41598_2018_28789_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/815de1a75c1a/41598_2018_28789_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/c80714a729c4/41598_2018_28789_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/d238de5ada2d/41598_2018_28789_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/e799e513f43a/41598_2018_28789_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/2f3c82a14f40/41598_2018_28789_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/3066bfbd4120/41598_2018_28789_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/2be658bebcb8/41598_2018_28789_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/1067a267b44a/41598_2018_28789_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/133e7833c41c/41598_2018_28789_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/815de1a75c1a/41598_2018_28789_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/c80714a729c4/41598_2018_28789_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/d238de5ada2d/41598_2018_28789_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/e799e513f43a/41598_2018_28789_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/2f3c82a14f40/41598_2018_28789_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/3066bfbd4120/41598_2018_28789_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/2be658bebcb8/41598_2018_28789_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/1067a267b44a/41598_2018_28789_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/faee/6041279/133e7833c41c/41598_2018_28789_Fig9_HTML.jpg

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