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AgBr/BiVO(4)photocatalysts with heterojunction structures were prepared using a hydrothermal method. To analyse phase composition and microstructure, samples were characterised by X-ray diffraction and scanning electron microscopy, respectively. Photoluminescence measurements were used to characterise the recombination rate of photogenerated electron-hole pairs. The phase structure, chemical state and optical properties of heterojunctions were analysed by UV-visible diffuse-reflectance spectrometry. AgBr/BiVO(4)showed high efficiency for the degradation of rhodamine B under visible light irradiation. Hydrothermal temperature and pH values exhibited significant influence on band gap energy and the recombination rate of electron-hole pairs of AgBr/BiVO4, reflective of photocatalytic properties. Results show that at 160 degrees C and pH of 7 AgBr/BiVO(4)achieved the best photocatalytic activity, for which the visible light-absorption range of the AgBr/BiVO(4)heterojunction was significantly enhanced. Photodegradation catalysis of RhB was most efficiently achieved at a level of approximately 56.72% for a reaction time of 140 min.
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