The deliberate introduction of oxygen vacancies (OVs) in semiconductor photocatalysts has emerged as an effective strategy for enhancing photocatalytic activity. However, the quantitative relationship between OV concentration and catalytic efficiency remains insufficiently understood. Herein, we developed a controlled hydrothermal synthesis of OV-engineered BiOBr nanosheets, employing ethylene glycol (EG) as a versatile structural modulator to precisely tailor OV concentrations. By systematically adjusting the EG/water ratio in the precursor solution, precise control over OV concentration was ...
