Citation: Tian Liu, Yunfeng Li, Hejia Sun, Min Zhang, Zhiling Xia, Qing Yang. Asymmetric Structure Awakened n-π* Electron Transition in Sulfur and Selenium Co-doped g-C₃N₄ with Efficient Photocatalytic Performance[J]. Chinese Journal of Structural Chemistry, ;2022, 41(6): 220605. doi: 10.14102/j.cnki.0254-5861.2022-0152 shu

Asymmetric Structure Awakened n-π* Electron Transition in Sulfur and Selenium Co-doped g-C₃N₄ with Efficient Photocatalytic Performance

Tian Liu ¹ ,
Yunfeng Li ^1,, ,
Hejia Sun ² ,
Min Zhang ¹ ,
Zhiling Xia ¹ ,
Qing Yang ¹

1.
College of Environmental and Chemical Engineering, Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710000, China
2.
College of Physical Education, Xi'an Polytechnic University, Xi'an 710000, China

Corresponding author: Yunfeng Li, liyf377@nenu.edu.cn
Received Date: 9 June 2022
Accepted Date: 18 June 2022

Figures(8)

Sulfur and selenium co-doped graphitic carbon nitride (SSCN) with efficient photocatalytic activity was synthesized by synchronously introducing sulfur and selenium atoms into the melon structure of g-C₃N₄ (GCN) via a facile solid-phase thermal reaction of GCN and SeS₂. The as-prepared SSCN possesses a larger specific surface area with a richer pore structure that provides more active centers for catalytic reaction. More importantly, the asymmetric structure of SSCN due to introducing sulfur and selenium not only maintains an easier activation of π-π* electron transition but also awakens the n-π* electron transition in g-C₃N₄. Moreover, the n-π* electron transition of SSCN can be controlled through changing the amount of SeS₂, which can greatly extend the photo-response range to 600 nm. As a result, the SSCN samples show an excellent photo-degradation performance for typical antibiotic of tetracycline hydrochloride (TC). The specific degradation route and main intermediates of TC based on liquid chromatograph mass spectrometer (LC-MS) analysis are also investigated and discussed.
- photocatalysis,
- Co-doping,
- n-π* transition,
- charges transfer,
- photo-degradation
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Asymmetric Structure Awakened n-π* Electron Transition in Sulfur and Selenium Co-doped g-C3N4 with Efficient Photocatalytic Performance

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Asymmetric Structure Awakened n-π* Electron Transition in Sulfur and Selenium Co-doped g-C₃N₄ with Efficient Photocatalytic Performance