I wish to know how to obtain nano-boehmite powder form, when these particles are suspended in aqueous solution. By centrifuge method at high speed.which might allow to collect get boehmite nano-particle and then subject them to oven for drying over nite leads to get powder form. whether this above method can be carried out ?. As we prepared this nanoboehmite from commercial available powder using hydrothermal method or sonication to break down mirco size at aqueous medium into nano particle. In-general, freeze dryer method will help us to remove the aqueous solution after it is frozen state. however, my lab does not have that instrument. So therefore looking for valuable recommendation, to finish of my work ASAP