Citation: Zihao Chen, Ben Chong, Nathan Wells, Guidong Yang, Lianzhou Wang. Constructing a coplanar heterojunction through enhanced π-π conjugation in g-C₃N₄ for efficient solar-driven water splitting[J]. Chinese Chemical Letters, ;2022, 33(5): 2579-2584. doi: 10.1016/j.cclet.2021.08.118 shu

Constructing a coplanar heterojunction through enhanced π-π conjugation in g-C₃N₄ for efficient solar-driven water splitting

Zihao Chen ^a ,
Ben Chong ^a ,
Nathan Wells ^a ,
Guidong Yang ^{a, *} ,
Lianzhou Wang ^{b, *}

a.
XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
b.
School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, the University of Queensland, QLD 4072, Australia

guidongyang@xjtu.edu.cn

l.wang@uq.edu.au

Received Date: 28 July 2021
Revised Date: 7 August 2021
Accepted Date: 28 August 2021
Available Online: 3 September 2021

Figures(5)

Adjusting the electronic structure of graphitic carbon nitride (g-C₃N₄) photocatalyst through π-π conjugation is an effective method to achieve efficient photogenerated carrier separation. One key challenge of π-π conjugation control is to tune the degree of such conjugation without destroying the g-C₃N₄ structure. Herein we report a conceptual design that achieves a coplanar heterojunction by enhancing the π-π conjugation via the doping of crystalline g-C₃N₄ using a conjugated double bond ring molecule, 1,3,5-benzenetriol, during calcination process. The selection of the dopant enables the facile creation of a unique coplanar heterojunction which not only retains the pristine network structure of g-C₃N₄, but remarkably promotes separation and transfer of photogenerated carriers through the enhanced π-conjugated endogenous electric field. As a result, the new g-C₃N₄ photocatalyst efficiently photocatalytically produces hydrogen from water under visible light irradiation with a high H₂ production rate up to 94.94 μmol/h, and a notable external quantum efficiency of 16.4% at 420 nm.
- g-C₃N₄,
- Charge separation,
- Coplanar heterojunction,
- Enhanced π-π conjugation,
- Photocatalysis
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Constructing a coplanar heterojunction through enhanced π-π conjugation in g-C3N4 for efficient solar-driven water splitting

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通讯作者: 陈斌, bchen63@163.com

Constructing a coplanar heterojunction through enhanced π-π conjugation in g-C₃N₄ for efficient solar-driven water splitting