In situ N‐doped Bi₃O₄Br/(BiO)₂CO₃ ultrathin nanojunctions with matched energy band structure for nonselective photocatalysis pollutant removal

Novel N‐doped Bi 3 O 4 Br/(BiO) 2 CO 3 ultrathin nanojunctions have been prepared. Alkalization dehalogenation was performed to form Bi 3 O 4 Br, surfactant was employed to control the ultrathin thickness, and few‐layers of C 3 N 4 as a sacrificial agent were used to build the N‐doped (BiO) 2 CO 3 . The photocatalytic behavior of the achieved N‐doped Bi 3 O 4 Br/(BiO) 2 CO 3 ultrathin nanojunctions was evaluated through the degradation of antibiotic agent ciprofloxacin, tetracycline hydrochloride, and endocrine disrupting chemical bisphenol A as well as typical dye rhodamine B under visible light irradiation. The matched energy band structure between Bi 3 O 4 Br and (BiO) 2 CO 3 could endow the highly efficient interfacial charge separation, thus leading to excellent nonselective photocatalytic behavior. The structure design in this system will open new windows for the reasonable design of other photocatalysts.