Abstract
• AgBr was prepared by a hydrothermal method with PVP. • Separation of photoactivated carriers has been largely promoted. • The level of •O 2 - was greatly boosted. • PVP-AgBr possess superior photocatalytic activity. In this paper, AgBr photocatalyst was prepared by a precipitation method using silver nitrate and potassium bromide as raw materials. The effects of polyvinylpyrrolidone (PVP) on the preparation and photocatalytic property of AgBr were investigated. The samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), surface photovoltage (SPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and specific surface area (BET). Using rhodamine B as a model pollutant, photocatalytic performance of the photocatalyst prepared was tested under visible light irradiation. The results indicate that AgBr prepared by adding of PVP has superior photocatalytic activity. Under visible light irradiation, the destruction rate constant of rhodamine B (RhB) on PVP-AgBr is 4.79 times of that on the reference AgBr.
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