Abstract
Bi2O3/BiVO4 heterojunctions with enriched oxygen vacancies (OVs) were prepared by a hydrothermal method. High-resolution transmission electron microscope (HRTEM), electron paramagnetic resonance (EPR), surface photovoltage spectra (SPS) and photoelectrochemical measurements confirm that the construction of Bi2O3/BiVO4 heterojunctions, and the build-in electric field between Bi2O3 and BiVO4 facilitates transfer of charge pairs and increases the lifetime of carriers, the existence of oxygen vacancies (OVs) plays a leading role in the improvement of photocatalytic performance. Photocatalytic activity of the constructed catalysts was systematically assessed by destruction of tetracycline (TC) and rhodamine B (RhB). According to experimental results, photogenerated carrier transfer mechanism was proposed.
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