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author:

Wang, H. (Wang, H..) [1] | Wang, S. (Wang, S..) [2] | Li, J. (Li, J..) [3] | Zhi, S. (Zhi, S..) [4] | Liu, Y. (Liu, Y..) [5] | Jiang, K. (Jiang, K..) [6] | Yang, C. (Yang, C..) [7] | Wu, D. (Wu, D..) [8]

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Scopus

Abstract:

A novel pulsed laser-assisted modification was firstly employed to tailor the doping configuration of heteroatoms into graphitic carbon nitride (g-C3N4). Compared with the traditional thermal treatment to form single boron doping configurations (BCN-A), the laser modification could in situ incorporate boron dopants with two distinct configurations (corner (B-(N)3) and bay (H-B-(N)2) motifs) (BCN-L). Experimental characterizations and theory simulations reveal that the cyano group induces defect levels near the valence band (VB) maximum, while its incorporation with the H-B-(N)2 motifs results in the relocation of these defect levels to the vicinity of conduction band (CB) minimum. This modification effectively tunes the band structure of the g-C3N4, enhancing charge separation efficiency and extending the range of light absorption. Moreover, the B-(N)3 motifs at the corners significantly increased surface charge polarization, which boosted the adsorption of oxygen molecules and promoted electron transfer at the catalyst/O2 interface. Density functional theory simulation further revealed that the strong interactions between boron and oxygen atoms could boost oxygen adsorption and promote the formation of intermediate •O2−, which represents the initial step in this reaction mechanism. With these beneficial characteristics, the photocatalytic H2O2 production rate of the modified g-C3N4 reached 994.1 μmol g−1h−1, which indicates a significant increase from the 239.6 μmol −1h−1 of the pristine g-C3N4. Furthermore, the optimal BCN-L demonstrated significant photo-corrosion resistance, which maintained high catalytic activity for 10 h of continuous operation without noticeable degradation, achieving a total H2O2 yield of 10.2 mmol g−1. © 2025 Elsevier B.V.

Keyword:

Dual defects g-C3N4 H2O2 production Laser modification Photocatalysis

Community:

  • [ 1 ] [Wang H.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 2 ] [Wang S.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 3 ] [Li J.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 4 ] [Zhi S.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 5 ] [Liu Y.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 6 ] [Liu Y.]Henan Key Laboratory of Infrared Spectrum Measures and Applications, College of Physics, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 7 ] [Jiang K.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China
  • [ 8 ] [Yang C.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
  • [ 9 ] [Wu D.]School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, Henan, Xinxiang, 453007, China

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Source :

Chemical Engineering Journal

ISSN: 1385-8947

Year: 2025

Volume: 510

1 3 . 4 0 0

JCR@2023

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ESI Highly Cited Papers on the List: 0 Unfold All

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Chinese Cited Count:

30 Days PV: 1

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