Advanced Functional Carbon Nitride by Implanting Semi-Isolated VO 2 Active Sites for Photocatalytic H 2 Production and Organic Pollutant Degradation

It is critical to facilitate surface interaction for liquid-solid two-phase photocatalytic reactions. This study demonstrates more advanced, efficient, and rich molecular-level active sites to extend the performance of carbon nitride (CN). To achieve this, semi-isolated vanadium dioxide is obtained...

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Veröffentlicht in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2023-07, Vol.19 (28), p.e2300147
Hauptverfasser: Jourshabani, Milad, Asrami, Mahdieh Razi, Lee, Byeong-Kyu
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container_start_page e2300147
container_title Small (Weinheim an der Bergstrasse, Germany)
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creator Jourshabani, Milad
Asrami, Mahdieh Razi
Lee, Byeong-Kyu
description It is critical to facilitate surface interaction for liquid-solid two-phase photocatalytic reactions. This study demonstrates more advanced, efficient, and rich molecular-level active sites to extend the performance of carbon nitride (CN). To achieve this, semi-isolated vanadium dioxide is obtained by controlling the growth of non-crystalline VO anchored into sixfold cavities of the CN lattice. As a proof-of-concept, the experimental and computational results solidly corroborate that this atomic-level design has potentially taken full advantage of two worlds. The photocatalyst comprises the highest dispersion of catalytic sites with the lowest aggregation, like single-atom catalysts. It also demonstrates accelerated charge transfer with the boosted electron-hole pairs, mimicking heterojunction photocatalysts. Density functional theory calculations show that single-site VO anchored into the sixfold cavities significantly elevates the Fermi level, compared with the typical heterojunction. The unique features of semi-isolated sites result in a high visible-light photocatalytic H production of 645 µmol h g with only 1 wt% Pt. They also represent an excellent photocatalytic degradation for rhodamine B as well as tetracycline, surpassing the activities obtained from many conventional heterojunctions. This study presents exciting opportunities for the design of new heterogeneous metal oxide for a variety of reactions.
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