Facile synthesis of tetrahedral Ag 3 PO 4 mesocrystals and its enhanced photocatalytic activity

Abstract A novel and rapid strategy has been developed to synthesize tetrahedral Ag 3 PO 4 mesocrystals with the help of surfactant oleic acid. Homogeneous Ag 3 PO 4 tetrahedron with average apex-to-apex length of 1.1 μm could be synthesized under optimized conditions. Oleic acid is considered to be essential for the formation of this homogeneous tetrahedral morphology. The as-prepared tetrahedral Ag 3 PO 4 mesocrystals could be formed through the close-packed assembly of Ag 3 PO 4 nanoparticles, thus the formation of tetrahedral Ag 3 PO 4 mesocrystals is explained by the oriented aggregation mechanism based on time-dependent experiments. Furthermore, the obtained tetrahedral Ag 3 PO 4 mesocrystals exhibit enhanced visible-light photocatalytic degradation of methylene blue (MB) and methyl orange (MO) solutions compared to the reported micro-sized spherical Ag 3 PO 4 particles with high photocatalytic performance.