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Ultrafast Charge Separation for Full Solar Spectrum-Activated Photocatalytic H-2 Generation in a Black Phosphorus-Au-CdS Heterostructure
Cai, Xiaoyan1; Mao, Liang1; Yang, Songqiu2; Han, Keli2; Zhang, Junying1
Source PublicationACS ENERGY LETTERS
2018-04-01
ISSN2380-8195
DOI10.1021/acsenergylett.8b00126
Volume3Issue:4Pages:932-939
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels ; Science & Technology - Other Topics ; Materials Science
WOS KeywordFIELD-EFFECT TRANSISTORS ; HYDROGEN-PRODUCTION ; ENVIRONMENTAL REMEDIATION ; CARBON NITRIDE ; QUANTUM DOTS ; EVOLUTION ; NANOSTRUCTURES ; ABSORPTION ; ENERGY ; LIGHT
AbstractTwo-dimensional layered black phosphorus (BP) with a tunable band gap of 0.3-2.0 eV has received great interest in broad-spectrum-active photocatalysis, but rapid charge recombination limits its potential applications. Herein, we report that BP quantum dots (QDs) work as active photosensitizer in a ternary heterostructure consisting of BP QDs, Au nanorods (NRs), and CdS nanowires (NWs), which efficiently photocatalytically generates H-2 at full solar spectrum, especially in the near-infrared (NIR) region. The superior performance of the BP-Au-CdS heterostructure arises from the overall photoabsorption contribution, the dual role (electron relay and plasmonic electron donor) of Au NRs, as well as the appropriate band alignment and strong coupling between the three components. Tracking the electron and hole transfers via femtosecond transient absorption spectroscopy shows a unidirectional electron flow from BP to Au and then to CdS, which has been achieved by the high conduction band level of BP, the well-harnessed work function match in BP-Au, and the well-established Schottky barrier in Au-CdS heterojunction.
Language英语
WOS IDWOS:000430369600024
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/168977
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhang, Junying
Affiliation1.Beihang Univ, Dept Phys, Minist Educ, Key Lab Micronano Measurement Manipulat & Phys, Beijing 100191, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Cai, Xiaoyan,Mao, Liang,Yang, Songqiu,et al. Ultrafast Charge Separation for Full Solar Spectrum-Activated Photocatalytic H-2 Generation in a Black Phosphorus-Au-CdS Heterostructure[J]. ACS ENERGY LETTERS,2018,3(4):932-939.
APA Cai, Xiaoyan,Mao, Liang,Yang, Songqiu,Han, Keli,&Zhang, Junying.(2018).Ultrafast Charge Separation for Full Solar Spectrum-Activated Photocatalytic H-2 Generation in a Black Phosphorus-Au-CdS Heterostructure.ACS ENERGY LETTERS,3(4),932-939.
MLA Cai, Xiaoyan,et al."Ultrafast Charge Separation for Full Solar Spectrum-Activated Photocatalytic H-2 Generation in a Black Phosphorus-Au-CdS Heterostructure".ACS ENERGY LETTERS 3.4(2018):932-939.
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