Abstract
H(2)O(2) photosynthesis represents an appealing approach for sustainable and decentralized H(2)O(2) production. Unfortunately, current reactions are mostly carried out in laboratory-scale single-phase batch reactors, which have a limited H(2)O(2) production rate (<100 μmol h(-1)) and cannot operate in an uninterrupted manner. Herein, we propose continuous H(2)O(2) photosynthesis and extraction in a biphasic fluid system. A superhydrophobic covalent organic framework photocatalyst with perfluoroalkyl functionalization is rationally designed and prepared via the Schiff-base reaction. When applied in a home-built biphasic fluid photo-reactor, the superhydrophobicity of our photocatalyst allows its selective dispersion in the oil phase, while formed H(2)O(2) is spontaneously extracted to the water phase. Through optimizing reaction parameters, we achieve continuous H(2)O(2) photosynthesis and extraction with an unprecedented production rate of up to 968 μmol h(-1) and tunable H(2)O(2) concentrations from 2.2 to 38.1 mM. As-obtained H(2)O(2) solution could satisfactorily meet the general demands of household disinfection and wastewater treatments.