Fabricating carbon nitride-based 3D/0D intramolecular donor–acceptor catalysts for efficient photoreduction of CO<sub>2</sub>

Due to the different electron affinity, the construction of a donor-acceptor (DA) system in the graphitic carbon nitride (g-CN) matrix is an attractive tactic to accelerate photo-induced electron-holes separation, and then further elevate its photocatalytic performance. In this work, perylene tetracarboxylic dianhydride (PTCDA) with magnificent electron affinity and excellent thermal stability was chosen to copolymerize with urea via facile one-pot thermal copolymerization to fabricate g-CN-PTCDA equipped with DA structures. The specific surface area of g-CN-PTCDA would be enlarged and the visible light absorption range would be broadened simultaneously when adopting this copolymerization strategy. A series of characterizations such as electron paramagnetic resonance (EPR), steady and transient photoluminescence spectra (PL), electrochemical impedance spectroscopy (EIS), and photocurrent tests combined with computational simulation confirmed the charge separation and transfer efficiency dramatically improved due to the DA structures construction. When 0.25% wt PTCDA was introduced, the CO evolution rate was nearly 23 times than that of pristine g-CN. The CO evolution rate could reach up to 87.2 μmol g−1 h−1 when certain Co2+ was added as co-catalytic centers. Meanwhile, g-CN-1 mg PTCDA-Co exhibited excellent long-term stability and recyclability as a heterogeneous photocatalyst. This research may shed light on designing more effective DA structures for solar-to-energy conversion by CO2 reduction.

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Fabricating carbon nitride-based 3D/0D intramolecular donor–acceptor catalysts for efficient photoreduction of CO₂

Abstract: Mass transfer efficiency and charge carrier behavior are two crucial factors affecting the photocatalytic performance of a catalyst. Donor-acceptor (DA) structure has shown great potential in facilitating charge carrier migration,...

Cited by 4 publications

References 55 publications

The synthesis and key features of 3D carbon nitrides (C3N4) used for CO2 photoreduction

The synthesis and key features of 3D carbon nitrides (C3N4) used for CO2 photoreduction

Hydrogen catalytic performance of hybrid Fe3O4/FeS2/g-C3N4 nanocomposite structures

Facile Construction of Intramolecular g-CN-PTCDA Donor-Acceptor System for Efficient CO2 Photoreduction

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Fabricating carbon nitride-based 3D/0D intramolecular donor–acceptor catalysts for efficient photoreduction of CO2

Abstract: Mass transfer efficiency and charge carrier behavior are two crucial factors affecting the photocatalytic performance of a catalyst. Donor-acceptor (DA) structure has shown great potential in facilitating charge carrier migration,...

Cited by 4 publications

References 55 publications

The synthesis and key features of 3D carbon nitrides (C3N4) used for CO2 photoreduction

The synthesis and key features of 3D carbon nitrides (C3N4) used for CO2 photoreduction

Hydrogen catalytic performance of hybrid Fe3O4/FeS2/g-C3N4 nanocomposite structures

Facile Construction of Intramolecular g-CN-PTCDA Donor-Acceptor System for Efficient CO2 Photoreduction

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Fabricating carbon nitride-based 3D/0D intramolecular donor–acceptor catalysts for efficient photoreduction of CO₂