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Review on constructed strategies of heterojunctional nanocomposites as efficient visible-light catalysts by modulating excited electrons with appropriate thermodynamic energy

Abstract

Due to the gradual depletion of the fossil fuel reserves on earth and increasing pollution in environments, it is highly desirous to develop renewable technologies for clean energy production and environmental remediation through the extensively applied semiconductor photocatalysis. As for an efficient photocatalysis, apart from the charge separation, possessing enough thermodynamic abilities are the prerequisites to induce redox reactions for the photogenerated electrons and holes. For most visible-light-responsive semiconductor photocatalysts, photogenerated holes exhibit strong oxidation ability because of their appropriate valence band top levels. However, the ability of the photoelectrons to induce reduction reactions is weak generally due to their low conduction band bottom levels. Hence, a feasible strategy is to rationally construct heterojunctional systems with thermodynamically appropriate energy platforms as space-separated electron shuttles for further intensifying reduction reactions for efficient visible-light photocatalysis. Obviously, it is much meaningful to clarify the appropriate electron energy platform-dependent efficient heterojunctional photocatalysts under visible-light irradiation and to review recent developments. In this review, special emphasis has been given to the bridged heterojunction-related advances in our group, highlighting the visible-light-responsive single-metal oxides like Fe2O3, bi-metal oxides like BiVO4, plasmonic noble metal nanoparticles like Au and polymer-based nanomaterials like g-C3N4 as model photocatalysts. Apparently, it is of great significance to design efficient nanophotocatalysts for fields related to energy production and environmental remediation from the scientific and engineering points of view.

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Publication details

The article was received on 04 Mar 2019, accepted on 02 Apr 2019 and first published on 02 Apr 2019


Article type: Review Article
DOI: 10.1039/C9TA02373A
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Review on constructed strategies of heterojunctional nanocomposites as efficient visible-light catalysts by modulating excited electrons with appropriate thermodynamic energy

    Z. Zhang, L. Bai, Z. J. Li, Y. Qu and L. Jing, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA02373A

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