Citation: Bolin Zhao, Zhifang Wu, Baohua Zhang, Li Niu, Yuwei Zhang. Solid phase transition behavior induced the synthesis of unique high crystallinity C₃N₄ nanosheets and the super-stability in ECL[J]. Chinese Chemical Letters, ;2026, 37(7): 112161. doi: 10.1016/j.cclet.2025.112161 shu

Solid phase transition behavior induced the synthesis of unique high crystallinity C₃N₄ nanosheets and the super-stability in ECL

Bolin Zhao ^{a, c} ,
Zhifang Wu ^{b, *,} ,
Baohua Zhang ^d ,
Li Niu ^{d, e, *,} ,
Yuwei Zhang ^{a, *,}

a.
GDMPA Key Laboratory for Process Control and Quality Evaluation of Chiral Pharmaceuticals, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, School of Chemistry, South China Normal University, Guangzhou 510006, China
b.
School of Resources and Civil Engineering, Gannan University of Science and Technology, Ganzhou 341000, China
c.
Department of Clinical Laboratory, Department of Oncology, Life Science Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453100, China
d.
Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Photoelectric Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
e.
School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China

9320240089@gnust.edu.cn

niuli@mail.sysu.edu.cn

ywzhang@scnu.edu.cn

Received Date: 25 June 2025
Revised Date: 28 September 2025
Accepted Date: 22 November 2025
Available Online: 23 November 2025

Figures(6)

Understanding the nucleation, growth and structural phase transitions process during the preparation of nanomaterials is crucial for the targeted design and controllable preparation of nanomaterials with specific structures and properties. Herein, a “solid phase transition” behavior is first found in the semiconductor C₃N₄ material during the conversion process from amorphous bulk C₃N₄ to high crystallinity C₃N₄ nanosheets, which usually exists in the process of metals or alloys conversion. A unique C₃N₄ nanosheet structure with uniform size distribution is successfully synthesized with a simple two-step calcination method, which is totally different from the traditional irregular nanosheets exfoliated from the bulk C₃N₄. This C₃N₄ nanosheets also possess high crystallinity and it helps to promote the migration of charge carriers during the catalytic process. By precisely exploring the synthesis process, a new “solid phase transition” mechanism is introduced to help understand the atoms recrystallize and grow to form the uniform high crystallinity nanosheets. The high yield (86%) of this strategy also overcomes the problem of low efficiency in preparing C₃N₄ nanosheets. Besides, the advantages of this uniform high crystallinity C₃N₄ nanosheets result in superior long-term stability in 100 CV cycles during the electrochemiluminescence (ECL) test, which is particularly superior to conventional C₃N₄ nanosheets.
- Solid phase transition,
- C₃N₄ nanosheet,
- High crystallinity,
- High yield,
- Electrochemiluminescence
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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

Solid phase transition behavior induced the synthesis of unique high crystallinity C3N4 nanosheets and the super-stability in ECL

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通讯作者: 陈斌, bchen63@163.com

Solid phase transition behavior induced the synthesis of unique high crystallinity C₃N₄ nanosheets and the super-stability in ECL