Volume 9 Issue 5
May  2024
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Article Navigation >  Green Energy&Environment  > 2024  >  9(5): 890-898
Tingting Xu, Jung Hur, Ping Niu, Shulan Wang, Sangwook Lee, Sang-Eun Chun, Li Li. Synthesis of crystalline g-C3N4 with rock/molten salts for efficient photocatalysis and piezocatalysis. Green Energy&Environment, 2024, 9(5): 890-898. doi: 10.1016/j.gee.2022.10.004
Citation: Tingting Xu, Jung Hur, Ping Niu, Shulan Wang, Sangwook Lee, Sang-Eun Chun, Li Li. Synthesis of crystalline g-C3N4 with rock/molten salts for efficient photocatalysis and piezocatalysis. Green Energy&Environment, 2024, 9(5): 890-898. doi: 10.1016/j.gee.2022.10.004
shu

Synthesis of crystalline g-C3N4 with rock/molten salts for efficient photocatalysis and piezocatalysis

doi: 10.1016/j.gee.2022.10.004

  • a. Department of Chemistry, College of Science, Northeastern University, Shenyang, 110819, China;

  • b. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, China;

  • c. School of Metallurgy, Northeastern University, Shenyang, 110819, China;

  • d. School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea;

  • e. School of Industrial Technology Advances, Kyungpook National University, Daegu, 41566, Republic of Korea

Funds:

This work was supported by the National Natural Science Foundation of China (51902045, 51904059), Fundamental Research Funds for the Central Universities (N2002005, N2125004, N2225038, N2225044), Applied Basic Research Program of Liaoning (2022JH2/101300200), Young Elite Scientist Sponsorship Program by CAST (YESS) 2019-2021QNRC, National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science, ICT &

Future Planning) (NRF-2020R1F1A1075601 and NRF-2021R1A4A2001658).

  • Received date 19 July 2022, Accepted date 13 October 2022, RevRecd date 08 September 2022, Publish date 20 October 2022,
    Abstract
  • Graphitic carbon nitride (g-C3N4) is emerging as a promising visible-light photocatalyst while the low crystallinity with sluggish charge separation/migration dynamics significantly restricts its practical applications. Currently, synthesizing highly crystalline g-C3N4 with sufficient surface activities still remains challenging. Herein, different from using alkali molten salts which is commonly reported, we propose an approach for synthesis of highly crystalline g-C3N4 with FeCl3/KCl rock/molten mixed salts. The rock salt can serve as the structure-directing template while molten salt provides the required liquid medium for re-condensation. Intriguingly, the synthesized photocatalyst showed further enhanced crystallinity and improved surface area along with high π→π* excitation compared with crystalline C3N4 prepared from conventional molten-salt methods. These catalytically advantageous features lead to its superior photocatalytic and piezocatalytic activities with a high reactivity for overall water splitting that is not commonly reported for C3N4. This work provides an effective strategy for structural optimization of organic semiconductor based materials and may inspire new ideas for the design of advanced photocatalysts.

     

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