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Pyrene-benzothiadiazole-based Polymer/CdS2D/2D Organic/Inorganic Hybrid S-scheme Heterojunctionfor Efficient Photocatalytic H
2Evolution

Ruiqi Gao, Huan He, Junxian Bai, Lei Hao, Rongchen Shen*, Peng Zhang, Youji Li and Xin Li*
The blue cover, together with elements such as blisters, lightning and the sun, highlights the good prospect of this new type of heterojunction as a photocatalytic material. The "S" shaped dragon depicted by the element of water rises from the bottom, implying that the dragon gets water and magically turns water into green hydrogen over organic/inorganic S-type heterojunction photocatalyst under sunlight irradiation.


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Molecular Engineering of g-C3N4 with Dibenzothiophene Groups as Electron Donor for Enhanced Photocatalytic H2-Production

Shanren Tao, Sijie Wan, Qinyang Huang, Chengming Li, Jiaguo Yu and Shaowen Cao*

Chin. J. Struct. Chem. 2022, 41, 2206048-2206054  DOI: 10.14102/j.cnki.0254-5861.2022-0068

June 20, 2022

carbon nitride, donor-acceptor, photocatalysis, charge transfer

ABSTRACT

The construction of donor-acceptor (D-A) molecular structure is an attractive strategy to enhance the photocatalytic performance of polymeric semiconductors. Herein, dibenzothiophene (DBT)-4-carbaldehyde as the precursor is introduced into g-C3N4 (TCN) prepared by two-step thermal polymerization to construct an intramolecular D-A type copolymer (TCN-DBTx). DFT calculation and experimental results reveal that DBT plays the role of electron donor unit to modify g-C3N4. The incorporation of DBT not only adjusts the band gap to improve reduction ability, but also induces an internal electric field with extending π-conjugated system for effective charge transfer. As a result, TCN-DBTx exhibits much better photocatalytic performance with an optimal hydrogen production rate of 3334 μmol h-1 g-1, which is 2.5 times that of TCN. This work provides a protocol for preparing high-performance g-C3N4-based photocatalysts toward various applications.


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