Tandem internal electric fields in intralayer/interlayer carbon nitride homojunction with a directed flow of photo-excited electrons for photocatalysis

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dc.contributor.authorZhang, J.
dc.contributor.authorTan, X.
dc.contributor.authorShi, L.
dc.contributor.authorChen, H.
dc.contributor.authorLiu, Y.
dc.contributor.authorWang, S.
dc.contributor.authorDuan, X.
dc.contributor.authorWu, M.
dc.contributor.authorSun, H.
dc.contributor.authorWang, S.
dc.date.issued2023
dc.description.abstractPhotocatalytic hydrogen production is a green technology while significantly impeded by the sluggish and uncontrolled charge dynamics for less electron accumulation on catalyst surface. Herein, we proposed an effective strategy of epitaxial growth of a van der Waals (VDW) homojunction on an intralayer homojunction of carbon nitride for a controlled charge flow. Experimental and simulation collectively disclosed a tandem internal electric field (IEF) in the integrated hybrid, stringing a lateral IEF along the intralayer homojunction with a vertical IEF within the VDW homojunction. The planar IEF dominates laterally dispersive movement of charge carriers for their efficient separations and mobilities, meanwhile the vertical IEF induces an oriented accumulation of the dispersive hot electrons to the catalyst surface for intensified hydrogen reduction. The tandem IEF renders the hydrogen evolution rate at 3.5-fold higher than in-planar homojunction, and 6.3 times higher than g-C3N4 benchmark. This work realizes charge-directing dynamics for robust photocatalysis.
dc.description.statementofresponsibilityJinqiang Zhang, Xiaojie Tan, Lei Shi, Haijun Chen, Yazi Liu, Shuaijun Wang, Xiaoguang Duan, Mingbo Wu, Hongqi Sun, Shaobin Wang
dc.identifier.citationApplied Catalysis B: Environmental, 2023; 333:122781-1-122781-11
dc.identifier.doi10.1016/j.apcatb.2023.122781
dc.identifier.issn0926-3373
dc.identifier.issn1873-3883
dc.identifier.orcidDuan, X. [0000-0001-9635-5807]
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.urihttps://hdl.handle.net/2440/140161
dc.language.isoen
dc.publisherElsevier BV
dc.relation.granthttp://purl.org/au-research/grants/arc/DP170104264
dc.relation.granthttp://purl.org/au-research/grants/arc/DP190103548
dc.rights© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
dc.source.urihttps://www.sciencedirect.com/
dc.subjectIntegrated carbon nitride homojunction; Tandem internal electrical field; Directed charge flow; Maximum photocatalysis; Hydrogen production
dc.titleTandem internal electric fields in intralayer/interlayer carbon nitride homojunction with a directed flow of photo-excited electrons for photocatalysis
dc.typeJournal article
pubs.publication-statusPublished

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