Tailoring carbon intercalated α,β-FePc heterophase junction to boost electron transfer for 1O2-dominated photo-Fenton reaction

[Display omitted] •Carbon intercalated heterophase junction is prepared by calcined regulation strategy.•Internal electric field in heterophase junction propels photo-carriers separation.•Carbon intercalation enables optimized band structure and stronger electron transfer.•H2O2 activation follows h+-meditated two-step oxidation for 1O2 generation.•1O2-dominated antibiotic degradation exhibits highly anti-interference performance. Construction of 1O2-dominated photo-Fenton reaction (PFR) is of great significance to enhance the compatibility to complicated water matrices, due to the selectivity of 1O2. Herein, a carbon intercalated heterophase junction (α,β-FePc@C) is constructed through a calcination-regulated strategy. The as-synthesized α,β-FePc@C exhibited high efficiency in tetracycline degradation with catalyst-dosage-normalized kinetic rate constant of 1.39 L min-1 g-1, outperforming most previously reported works. Importantly, H2O2 activation follows h+-meditated two-step oxidation, resulting in 1O2-dominated reaction with strong anti-interference performance. Experimental and theoretical evidences reveal that dual phases of α-FePc and β-FePc are strategically retained to form heterophase junction, creating internal electric field to propel the photogenerated carrier separation. Carbon intercalation not only optimizes band structure to promote electron transition but also boosts the electron transfer for H2O2 activation. In general, this work presents a facile strategy of constructing photocatalyst for 1O2-dominated PFR and sheds light on upgrading the adaptability of PFR to complex water matrices.