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dc.contributor.authorXu, Chenxuan
dc.contributor.authorBo, Zheng
dc.contributor.authorWu, Shiwen
dc.contributor.authorWen, Zhenhai
dc.contributor.authorChen, Junxiang
dc.contributor.authorLuo, Tengfei
dc.contributor.authorLee, Eungkyu
dc.contributor.authorXiong, Guoping
dc.contributor.authorAmal, Rose
dc.contributor.authorWee, Andrew TS
dc.contributor.authorYan, Jianhua
dc.contributor.authorCen, Kefa
dc.contributor.authorFisher, Timothy S
dc.contributor.authorOstrikov, Kostya Ken
dc.date.accessioned2020-10-21T00:23:08Z
dc.date.available2020-10-21T00:23:08Z
dc.date.issued2020
dc.identifier.issn0038-092X
dc.identifier.doi10.1016/j.solener.2020.07.069
dc.identifier.urihttp://hdl.handle.net/10072/398535
dc.description.abstractEffective separation and transfer of photogenerated charge carriers are common issues in solar energy conversion. Strong localized electric fields near functional nanostructures reduce charge recombination and boost energy efficiency and photocatalytic activity. However, common metal-based photocatalytic systems on conducting supports under-utilize infrared (IR) light energy, and suffer from unsatisfactory interface quality and stability, as well as high complexity and cost. Here we develop a photocatalytic nano-antennas simultaneously featuring localized field-enhancement in IR, high electric conductivity, and interface stability. In the nano-antennas, plasma-made all-carbon vertical graphene nanopetals (GPs) are covalently interfaced with high-performance metal-free semiconducting graphitic carbon nitride (g-C3N4) photocatalyst. The photo-induced force microscopy is used to obtain real-space images of localized electric field enhancement in the near-IR and mid-IR ranges along the vertically standing ultra-sharp GP edge nano-antennas. The photocurrent, electrochemical impedance spectra, and time-resolved photoluminescence spectra confirm that the GP edge nano-antennas significantly enhance the photogenerated charge carrier separation, accelerate carrier migration, and prolong carrier lifetime. We also demonstrate the scalability of production of the petal edge nano-antennas. The unique graphene nanoarchitecture offer exotic spectral properties, which are essential for many large-scale solar energy harvesting applications such as photocatalysis, photovoltaics, and solar-thermal water desalination and purification.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom379
dc.relation.ispartofpageto387
dc.relation.ispartofjournalSolar Energy
dc.relation.ispartofvolume208
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchEnvironmental nanotechnology and nanometrology
dc.subject.fieldofresearchBuilt environment and design
dc.subject.fieldofresearchcode40
dc.subject.fieldofresearchcode410306
dc.subject.fieldofresearchcode33
dc.subject.keywordsScience & Technology
dc.subject.keywordsEnergy & Fuels
dc.subject.keywordsSolar energy conversion
dc.subject.keywordsPlasma made nanostructures
dc.titleVertical graphene nano-antennas for solar-to-hydrogen energy conversion
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationXu, C; Bo, Z; Wu, S; Wen, Z; Chen, J; Luo, T; Lee, E; Xiong, G; Amal, R; Wee, ATS; Yan, J; Cen, K; Fisher, TS; Ostrikov, KK, Vertical graphene nano-antennas for solar-to-hydrogen energy conversion, Solar Energy, 2020, 208, pp. 379-387
dc.date.updated2020-10-20T22:10:46Z
gro.hasfulltextNo Full Text
gro.griffith.authorOstrikov, Ken


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