Facile one-pot surfactant-free synthesis of hierarchical dahlia-like TiO 2 /V 2 O 5 composite with enhanced adsorption capacity for methylene blue

We demonstrated a novel facile one-pot surfactant-free strategy for synthesis of the hierarchical dahlia-like TiO 2 /V 2 O 5 composite. Both amorphous TiO 2 and V 2 O 5 can uniformly mix to form a hierarchical dahlia-like nanostructure. The adsorption process of TiO 2 /V 2 O 5 composite toward methylene blue (MB) is considerably fitted by PFO kinetic model. The fitted maximum equilibrium adsorption capacity of MB is circa 501.28 mg/g by Langmuir isotherm model. The mechanisms of MB adsorption on TiO 2 /V 2 O 5 composite could be composed by physical and electrostatic interaction. The considerable recyclability of TiO 2 /V 2 O 5 composite after five cycle regeneration rounds suggests that the TiO 2 /V 2 O 5 composite could be a potential adsorption candidate for MB removal in wastewater. Graphical abstract