Tungstophosphoric acid on core/shell polystyrene/silica microspheres were prepared.
Spheres presented a narrow size distribution and SiO2 nanoparticles uniform layer.
Mesoporous tungstophosphoric acid impregnated solids were achieved.
Tungstophosphate anion with undegraded Keggin structure is present in the solids.
Solids have very strong acid sites being suitable for use in acid catalyzed reactions.