Citation: Ge Song, Huizhong Wu, Chaohui Zhang, Xuechun Wang, Shuaishuai Li, Jiangli Sun, Xiuwu Zhang, Minghua Zhou. Chlorinated antibiotics electrocatalytic dechlorination by construction of Co₃O₄/g-C₃N₄ heterojunctions for stable atomic hydrogen production[J]. Chinese Chemical Letters, ;2026, 37(2): 111373. doi: 10.1016/j.cclet.2025.111373 shu

Chlorinated antibiotics electrocatalytic dechlorination by construction of Co₃O₄/g-C₃N₄ heterojunctions for stable atomic hydrogen production

Ge Song ^{a, b, c} ,
Huizhong Wu ^{a, b, c} ,
Chaohui Zhang ^{a, b, c} ,
Xuechun Wang ^{a, b, c} ,
Shuaishuai Li ^{a, b, c} ,
Jiangli Sun ^{a, b, c} ,
Xiuwu Zhang ^{a, b, c} ,
Minghua Zhou ^{a, b, c, *,}

a.
Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
b.
Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
c.
Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China

zhoumh@nankai.edu.cn

Received Date: 30 December 2024
Revised Date: 19 March 2025
Accepted Date: 26 May 2025
Available Online: 26 May 2025

Figures(5)

Chlorinated antibiotics pose great challenges in efficient removal, while for the first time, this work greatly enhanced their electrocatalytic dechlorination performance by construction of non-noble metal Co₃O₄/g-C₃N₄ heterojunctions to improve process cost-effectiveness. The Co₃O₄/g-C₃N₄ heterojunction demonstrated an effective removal of 93.6% thiamphenicol (TAP) within 45 min, with the rate constant (0.0584 min^-1) that was 2.4 and 2.8 times that of Co₃O₄ and g-C₃N₄ alone, respectively. The formation of heterojunctions facilitated electron transfer, enriched the electron density on Co₃O₄, and enhanced the adsorption of pollutants as well as the desorption of degradation intermediates. The enhanced production of atomic hydrogen (H^*) of Co₃O₄/g-C₃N₄, which increased by 13.6–28.2 times, contributed more to pollutant removal (64.0%), much higher than that of Co₃O₄ (37.3%) and g-C₃N₄ (6.1%). The energy barrier for H₂ formation on Co₃O₄/g-C₃N₄ (0.75 eV) was higher than that on Co₃O₄ (-1.84 eV), supporting that it could stabilize H^* and inhibit the formation of H₂. The Co₃O₄/g-C₃N₄ heterojunction exhibited stable performance with less impact by pH and co-existing ions, and posed effectiveness for the dechlorination of typical chlorinated antibiotics. This study offers an efficient and sustainable strategy for constructing heterojunctions to enhance the performance of non-noble metal catalysts in electrocatalytic dechlorination.
- Electrocatalytic dechlorination,
- Co₃O₄/g-C₃N₄,
- Heterojunctions,
- Atomic hydrogen,
- Chlorinated antibiotics
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Chlorinated antibiotics electrocatalytic dechlorination by construction of Co3O4/g-C3N4 heterojunctions for stable atomic hydrogen production

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通讯作者: 陈斌, bchen63@163.com

Chlorinated antibiotics electrocatalytic dechlorination by construction of Co₃O₄/g-C₃N₄ heterojunctions for stable atomic hydrogen production