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  • Ag nanoparticles anchored organic/inorganic Z-scheme 3DOMM-TiO2–x-based heterojunction for efficient photocatalytic and photoelectrochemical water splitting

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    Embargoed until: 2024-03-24
    File version
    Accepted Manuscript (AM)
    Author(s)
    Xu, Z
    Guo, C
    Liu, X
    Li, L
    Wang, L
    Xu, H
    Zhang, D
    Li, C
    Li, Q
    Wang, W
    Griffith University Author(s)
    Li, Qin
    Year published
    2022
    Metadata
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    Abstract
    Narrow spectral response, low charge separation efficiency and slow water oxidation kinetics of TiO2 limit its application in photoelectrochemical and photocatalytic water splitting. Herein, a promising organic/inorganic composite catalyst Ag/PANI/3DOMM-TiO2–x with a three-dimensional ordered macro-and meso-porous (3DOMM) structure, oxygen vacancy and Ti3+ defects, heterojunction formation and noble metal Ag was designed based on the Z-scheme mechanism and successfully prepared. The Ag/PANI/3DOMM-TiO2–x ternary catalyst exhibited enhanced hydrogen production activity in both photocatalytic and photoelectrochemical water ...
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    Narrow spectral response, low charge separation efficiency and slow water oxidation kinetics of TiO2 limit its application in photoelectrochemical and photocatalytic water splitting. Herein, a promising organic/inorganic composite catalyst Ag/PANI/3DOMM-TiO2–x with a three-dimensional ordered macro-and meso-porous (3DOMM) structure, oxygen vacancy and Ti3+ defects, heterojunction formation and noble metal Ag was designed based on the Z-scheme mechanism and successfully prepared. The Ag/PANI/3DOMM-TiO2–x ternary catalyst exhibited enhanced hydrogen production activity in both photocatalytic and photoelectrochemical water splitting. The photocatalytic hydrogen production rate is 420.90 μmol g–1 h–1, which are 19.80 times and 2.06 times higher than the commercial P25 and 3DOMM-TiO2, respectively. In the photoelectrochemical tests, the Ag/PANI/3DOMM-TiO2–x photoelectrode shows enhanced separation and transfer of carriers with a high current density of 1.55 mA cm–2 at equilibrium potential of 1.23 V under simulated AM 1.5 G illumination, which is approximately 5 times greater than the 3DOMM-TiO2. The present work has demonstrated the promising potential of organic/inorganic Z-scheme photocatalyst in driving water splitting for hydrogen production.
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    Journal Title
    Chinese Journal of Catalysis
    Volume
    43
    Issue
    5
    DOI
    https://doi.org/10.1016/S1872-2067(21)63978-5
    Funder(s)
    ARC
    Grant identifier(s)
    DP200101105
    DP160104089
    Copyright Statement
    © 2022 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Publication URI
    http://hdl.handle.net/10072/414038
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