The porous TiO2 nanotubes/Ag3PO4 heterojunction for enhancing sunlight photocatalytic activity

The porous TiO 2 nanotubes/Ag 3 PO 4 heterojunction are synthesized via simple electrospining and chemical co-deposition method. The results of SEM, XRD , TEM and XPS imply that the Ag 3 PO 4 nanoparticles have been introduced on to the surface of TiO 2 nanotubes successfully. Compared with the unmodified samples, the photocatalytic activity of the as-prepared porous TiO 2 nanotubes/Ag 3 PO 4 heterojunction exhibit a remarkable enhancement by the degradation of methylene blue (MB) under the sunlight. Further, the Z-Scheme structure of the samples and the porous-tubular structure of the TiO 2 are considered as the main reasons for the enhancement.