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Title
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Spatial heterojunction in nanostructured TiO₂ and its cascade effect for efficient photocatalysis
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Author
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Abstract
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| A highly efficient photoenergy conversion is strongly dependent on the cumulative cascade efficiency of the photogenerated carriers. Spatial heterojunctions are critical to directed charge transfer and, thus, attractive but still a challenge. Here, a spatially ternary titanium-defected TiO2@carbon quantum dots@reduced graphene oxide (denoted as V-Ti@CQDs@rGO) in one system is shown to demonstrate a cascade effect of charges and significant performances regarding the photocurrent, the apparent quantum yield, and photocatalysis such as H-2 production from water splitting and CO2 reduction. A key aspect in the construction is the technologically irrational junction of Ti-vacancies and nanocarbons for the spatially inside-out heterojunction. The new "spatial heterojunctions" concept, characteristics, mechanism, and extension are proposed at an atomic- nanoscale to clarify the generation of rational heterojunctions as well as the cascade electron transfer. |
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Language
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English
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Source (journal)
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Nano letters / American Chemical Society. - Washington
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Publication
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Washington
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2020
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ISSN
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1530-6984
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DOI
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10.1021/ACS.NANOLETT.9B05121
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Volume/pages
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20
:5
(2020)
, p. 3122-3129
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ISI
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000535255300024
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Pubmed ID
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32343586
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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