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Heterostructured Ag3PO4/TiO2 composites have been fabricated via an in situ precipitation method by depositing Ag3PO4 nanoparticles onto the surface of TiO2 microspheres. The enhanced photocatalytic activity of the Ag3PO4/TiO2 heterostructures for the degradation of rhodamine B (RhB) under UV light irradiation could be attributed to the effective separation of photogenerated electron–hole pairs driven by the photoinduced potential difference generated at the Ag3PO4/TiO2 heterojunction interface. Furthermore, when 10 at% (molar percentage) of Ag3PO4 is loaded onto the TiO2 surface, the Ag3PO4/TiO2 composites exhibit the best photocatalytic activity and the rate constant of RhB degradation is over three times that of pure TiO2. In addition, the mechanism for the enhancement of the photocatalytic activity of Ag3PO4/TiO2 is also investigated by comparison of their PL spectra.

BiVO4 hollow spheres with hierarchical microstructures were synthesized by a hydrothermal process under microwave irradiation. The microstructure, morphology, and optical properties of BiVO4 materials were investigated in detail. The BiVO4 hollow spheres with high surface area are composed of regular surface‐orientated nanorods as building units with a diameter of 90 nm and the length of 0.5 to 1.2 μm. As a result of the morphology‐dependent advantage such as special hollow structure, regular surface orientation of small‐sized nanorods and hierarchical mesopores structure, these hollow spheres exhibit better photocatalytic efficiency in degradation of MO compared with the solid and nanosheets‐based spheres.

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