期刊
ADVANCED SCIENCE
卷 7, 期 20, 页码 -出版社
WILEY
DOI: 10.1002/advs.202001864
关键词
Au; carbon nanotubes hybrid networks; carbon nanotubes; gold nanoparticles; photoelectrochemical cells; plasmonic nanoparticles
资金
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI) for infrastructure and its operating funds
- Canada Research Chairs program
- UNESCO Chair in MATECSS for a PDF Excellence Scholarship
- University of Electronic Science and Technology of China
- China Postdoctoral Foundation [Y02006023607941]
- National Natural Science Foundation of China [5171101224]
- UNESCO Chair MATECSS
- Fonds de recherche du Quebec Nature et technologies (FRQNT)
- FRQNT
- Qingdao University
- Natural Science Foundation of Shandong province [ZR2018MB001]
- China Postdoctoral Science Foundation [2017M622992, 2019T120820]
- National Key Research and Development Program of China [2019YFB2203400]
- 111 Project [B20030]
- UESTC Shared Research Facilities of Electromagnetic Wave and Matter Interaction [Y0301901290100201]
Here, a facile approach to enhance the performance of solar-driven photoelectrochemical (PEC) water splitting is described by means of the synergistic effects of a hybrid network of plasmonic Au nanoparticles (NPs) decorated on multiwalled carbon nanotubes (CNTs). The device based on TiO2-Au:CNTs hybrid network sensitized with colloidal CdSe/(CdSexS1-x)(5)/(CdS)(1)core/alloyed shell quantum dots (QDs) yields a saturated photocurrent density of 16.10 +/- 0.10 mA cm(-2)[at 1.0 V vs reversible hydrogen electrode (RHE)] under 1 sun illumination (AM 1.5G, 100 mW cm(-2)), which is approximate to 26% higher than the control device. The in-depth mechanism behind this significant improvement is revealed through a combined experimental and theoretical analysis for QDs/TiO2-Au:CNTs hybrid network and demonstrates the multifaceted impact of plasmonic Au NPs and CNTs: i) hot-electron injection from Au NPs into CNTs and TiO2; ii) near-field enhancement of the QDs absorption and carrier generation/separation processes by the plasmonic Au NPs; iii) enhanced photoinjected electron transport due to the highly directional pathways offered by CNTs. These results provide fundamental insights on the properties of QDs/TiO2-Au:CNTs hybrid network, and highlights the possibility to improve the performance of other solar technologies.
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