Abstract: With the sodium tungstate as tungsten source, the mixture of water and alcohol solution as solvent, and triblock copolymer of ethylene oxide with propylene oxide(P123) as structure directing agent and porogen, mesoporous WO3 of special morphology was synthesized by precursor route and solvothermal method, and meanwhile the influence of different reaction time and temperature were also discussed. These samples were characterized and analyzed by the X-ray diffraction(XRD), scanning electron microscope(SEM), transmission electric microscope(TEM), N2 adsorption-desorption, UV-visible spectroscopy, and the thermo gravimetric(TG). The results show that the as-prepared WO3 materials possess mesoporous structure and large specific surface area, moreover, the increasing of the solvothermal time and reaction temperature are beneficial to the size enlargement and also the morphology variance of the WO3 particles. Absorption test of the synthesized mesoporous WO3 materials for rhodamine B dye in aqueous solution was also performed, and a good adsorption performance with a removal efficiency of 93.13% was achieved.

Key words: solvothermal method, special morphology, mesoporous, tungsten oxide, adsorption performance