K-doped g-C₃N₅ photocatalyst

7× higher H₂O₂ yield

K-ion doping combined with alkaline treatment introduces cyano groups and N vacancies, synergistically enhancing charge separation and transfer for efficient visible-light H2O2 photosynthesis.

Jing, Shengyu · Xu, Qingyuan · Wang, Haoran · Kannan, Palanisamy · Liang, Huagen · Brouzgou, Angeliki · Wang, Ruiyu · Tsiakaras, P.

Journal of Colloid and Interface Science 2025

Specifications

H₂O₂ yield

{'zh': '1546.7', 'en': '1546.7'} µmol L⁻¹ h⁻¹

Advantages

7× higher yield

Potassium doping promotes separation of electron-hole pairs and optimizes carrier transport, resulting in a sevenfold H₂O₂ yield increase over pure g-C₃N₅.

Alkaline treatment introduces cyano groups

High-temperature calcination and alkaline environment promote the formation of cyano groups and N vacancies, synergistically enhancing charge separation and transport.

Applications

• photocatalytic synthesis：Visible-light-driven H₂O₂ synthesis, replacing energy-intensive anthraquinone process
• clean energy：Utilize solar energy to produce green chemicals, reducing fossil fuel consumption
• green oxidants：In situ generation of H₂O₂ for oxidation reactions, avoiding transport and storage risks