Oxygen-Vacancy Dual-Site NiFe2O4/Ni@NC

Dominant Singlet Oxygen

Interfacial oxygen vacancy-metal dual sites deterministically control PMS activation, shifting from serendipitous discovery to predictable design.

Shihu, Cao · Shugang, Zheng · Tianci, Liu · Jinhao, Liu · Yaqi, Yin · Feng, Dan · Liu, Yunqing · Qian, Dayi · Shang, Jiangwei · Cheng, Xiuwen

Applied Catalysis B: Environmental 2026

Specifications

Enhancement in levofloxacin degradation rate

{'zh': '11', 'en': '11'} ×

Reduction in non-radical pathway energy barrier

{'zh': '0.037', 'en': '0.037'} eV

Advantages

High degradation efficiency

Activation of PMS generates powerful singlet oxygen, leading to an 11-fold enhancement in levofloxacin degradation rate.

Lower energy barrier

The interfacial synergy lowers the energy barrier of the non-radical pathway, reducing the energy required for the reaction.

Deterministic selectivity

The dual-site structure is proven to deterministically control reaction selectivity, addressing the challenge of uncontrolled pathways in non-radical catalysis.

Direct mechanistic evidence

First experimental trapping of the surface-bound singlet oxygen precursor provides direct evidence of the reaction intermediate.

Applications

• Advanced oxidation water treatment：Efficiently degrades organic pollutants like levofloxacin in water.
• Non-radical catalysis：Achieves controllable selectivity in PMS activation to generate singlet oxygen.
• MOF-derived carbon materials：Exploits MOF templates to construct carbon-based catalytic structures with dual sites.