Bromine-doped Bi2MoO6 nanosheets: synergistic effects of band structure engineering and oxygen vacancy regulation for boosting photocatalytic activity

Photocatalyst modification by energy level engineering is crucial for efficient free radical generation. Here, a novel strategy was employed to construct bromine-doped Bi 2 MoO 6 (BMO-Br) followed by an in-situ approach using Cetyltrimethylammonium bromide (CTAB) as the bromine (Br) precursor. The Br doping effectively modulated the energy band, increasing the oxygen vacancy concentration in Bi 2 MoO 6 . The modification significantly enhanced photoinduced charge separation and active free radical generation, leading to superior photocatalytic performance. The photocatalytic bacteriostatic and sulfamethazine (SM) degradation efficiency over BMO-Br-4 reached 100% and 70% within 60 min and 150 min, respectively. This work highlighted a facile yet effective strategy for tailoring the photocatalyst properties, demonstrating promising potential for various photocatalytic applications.