Preparation of mesoporous spherical magnesium hydroxide particles via the static self-assembled method

Abstract As the original first time, the novel mesoporous spherical magnesium hydroxide (MH) particles were synthesized via static self-assembled method using magnesium sulfate, ammonia solution, ethanol and sodium hydroxide as raw materials. To control the structure of the mesoporous spherical material, the effects of reaction time, MgSO 4 concentration, reaction temperature, contacting area and volume ratio were comprehensively investigated. Structural characterizations of these products were analyzed by SEM, XRD, TEM, EDX, SAED, FT-IR, TG-DTG and BET. The optimal parameters of mesoporous spherical MH preparation were obtained as follows: the reaction time was 25 h, the MgSO 4 concentration was 1–2 mol/L, the reaction temperature was 25–45 °C, the gas-liquid two-phase contacting area was 100–150 m 2 /m 3 . The structural characterizations analysis indicated that the mesoporous spherical materials prepared under optimal conditions were polycrystalline particles with many properties, such as high specific surface area, slit porous channels and uniform particle size distribution.