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- Title
Facile Construction of Intramolecular g-CN-PTCDA Donor-Acceptor System for Efficient CO 2 Photoreduction.
- Authors
Wei, Jiajia; Chen, Xing; Ren, Xitong; Tian, Shufang; Bai, Feng
- Abstract
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.
- Subjects
ELECTRON paramagnetic resonance spectroscopy; ELECTRON affinity; CARBON dioxide; ELECTRON paramagnetic resonance; PHOTOREDUCTION; VISIBLE spectra
- Publication
Catalysts (2073-4344), 2023, Vol 13, Issue 3, p600
- ISSN
2073-4344
- Publication type
Academic Journal
- DOI
10.3390/catal13030600