Vertically Grown COF/PTI Heterojunction

23× H₂O₂ Production

COF grown vertically on PTI nanosheets forms an intimate S-scheme van der Waals interface that greatly enhances charge separation for efficient H2O2 photosynthesis.

Yizhao, Liang · Zixuan, Li · Bingzi, Cai · Yibo, Zhou · Yu, Ma · Wang, Xin · Liu, Yuanyuan · Xiang, Quanjun · Zhao, Xiaojia

ChemSusChem 2026

Specifications

H₂O₂ production rate

{'zh': '4402', 'en': '4402'} μmol g⁻¹ h⁻¹

Apparent quantum yield

{'zh': '2.61', 'en': '2.61'} %

Advantages

Enhanced interfacial charge separation

The vertical growth creates an intimate interface and a strong internal electric field, establishing an efficient S-scheme charge transfer pathway that suppresses electron-hole recombination.

More abundant active sites

Vertically oriented COF exposes more accessible active sites to reactants, improving H₂O₂ generation efficiency.

Synergistic dual-pathway H₂O₂ production

The two-electron oxygen reduction (2e⁻ ORR) and two-electron water oxidation (2e⁻ WOR) proceed synergistically with high atom economy.

Applications

• Photocatalytic H₂O₂ Synthesis：Solar-driven synthesis avoids the energy-intensive anthraquinone process.
• COF-based Photocatalysts：Vertical growth overcomes COF agglomeration and buried active sites.
• 2D van der Waals Heterojunctions：Constructs a strongly coupled S-scheme interface to accelerate interlayer charge transfer.
• Artificial Photosynthesis：Mimics natural photosynthesis by coupling water oxidation and oxygen reduction.