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Peer-reviewedCC BY 4.0Molecules

Boosted H2O2 Photosynthesis via Synergistic Tuning Electronic Structure and Interfacial O2 Transfer on Floatable Carbon Nitride Networks

  • Xiaoying Peng1
  • Zhangsong Jiang1
  • Fanghua Liu1
  • Bingzhi Xiang1
  • Jielu Zhu1
  • Jie Lin1
  • Bo Wang1
  • Junwei Song1
  • Kai Yang2
  • Guiming Peng3
  1. 1Research Center of Advanced Materials and Green Energy, Jiangxi Institute of Technology, Nanchang 330098, China
  2. 2School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
  3. 3Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, Nanchang 330022, China
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Abstract

Solar-driven photosynthesis of hydrogen peroxide (H2O2) from O2 and H2O offers an eco-friendly and sustainable route. Metal-free graphitic carbon nitride (CN) is capable of photocatalytic H2O2 production, yet its efficiency is limited by insufficient charge separation and slow O2 supply in conventional diphase systems. Herein, we graft cinnamylidene groups into CN to fabricate a hydrophobic CN nanolayer (CNCA/CF). The incorporated cinnamylidene groups with extended conjugated chains narrow the bandgap, promote photocarrier separation and improve 2e ORR selectivity. Benefiting from the hydrophobicity of CNCA/CF, it can stably float on water and construct a gas–solid–liquid triphase interface that enables rapid O2 diffusion and delivery. Moreover, floating CNCA/CF exhibits a high H2O2 output of 1370 μmol m−2 h−1 in a homemade reactor, 15.3-fold higher than that of pristine CN. Mechanistic studies demonstrated that H2O2 is generated through a sequential 2e ORR process involving ·O2− as the crucial intermediate. This work highlights a feasible strategy combining triphase interface optimization with electronic tuning, providing a new platform for the rational design of photocatalysts for H2O2 triphase photosynthesis.

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Cite

BibTeXRIS
BibTeX
@article{peng2026boosted,
  title = {{Boosted H2O2 Photosynthesis via Synergistic Tuning Electronic Structure and Interfacial O2 Transfer on Floatable Carbon Nitride Networks}},
  author = {Xiaoying Peng and Zhangsong Jiang and Fanghua Liu and Bingzhi Xiang and Jielu Zhu and Jie Lin and Bo Wang and Junwei Song and Kai Yang and Guiming Peng},
  journal = {Molecules},
  year = {2026},
  month = oct,
  doi = {10.3390/molecules31203770},
  url = {https://www.mdpi.com/1420-3049/31/20/3770},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Boosted H2O2 Photosynthesis via Synergistic Tuning Electronic Structure and Interfacial O2 Transfer on Floatable Carbon Nitride Networks
AU  - Xiaoying Peng
AU  - Zhangsong Jiang
AU  - Fanghua Liu
AU  - Bingzhi Xiang
AU  - Jielu Zhu
AU  - Jie Lin
AU  - Bo Wang
AU  - Junwei Song
AU  - Kai Yang
AU  - Guiming Peng
PY  - 2026
DA  - 2026/10/01
JO  - Molecules
DO  - 10.3390/molecules31203770
UR  - https://www.mdpi.com/1420-3049/31/20/3770
AB  - Solar-driven photosynthesis of hydrogen peroxide (H2O2) from O2 and H2O offers an eco-friendly and sustainable route. Metal-free graphitic carbon nitride (CN) is capable of photocatalytic H2O2 production, yet its efficiency is limited by insufficient charge separation and slow O2 supply in conventional diphase systems. Herein, we graft cinnamylidene groups into CN to fabricate a hydrophobic CN nanolayer (CNCA/CF). The incorporated cinnamylidene groups with extended conjugated chains narrow the bandgap, promote photocarrier separation and improve 2e ORR selectivity. Benefiting from the hydrophobicity of CNCA/CF, it can stably float on water and construct a gas–solid–liquid triphase interface that enables rapid O2 diffusion and delivery. Moreover, floating CNCA/CF exhibits a high H2O2 output of 1370 μmol m−2 h−1 in a homemade reactor, 15.3-fold higher than that of pristine CN. Mechanistic studies demonstrated that H2O2 is generated through a sequential 2e ORR process involving ·O2− as the crucial intermediate. This work highlights a feasible strategy combining triphase interface optimization with electronic tuning, providing a new platform for the rational design of photocatalysts for H2O2 triphase photosynthesis.
SN  - 1420-3049
ER  -