Ultrasonic-induced Assembly Of Mesoporous Composite Functional Materials

In this paper, high-intensity ultrasonic induced assembly ofmesoporous composite materials and reaction mechanism wasinvestigated. alumina is used as a catalyzer , a support forcatalytically active species , a doped materials as polymers ,etc.And nickel aluminum oxides can be used as a catalyzer, the anodematerial of a fuel cell, an absorption material of YAG laser,humidity sensor , an excellent magneto-optic material, etc. So,alumina and nickel aluminum oxides were studied in this paper. Onthe basis of understanding synthesis mechanism of alumina, ifhexagonal ordered nickle aluminum oxides were obtainable asmesoporous solids, they would be promising as some propertiesmentioned above. The main contents of this paper includes: ⑴ The effect of ultrasonic on synthesis of hexagonalmesoporous alumina was investigated extensively such as the effectof different power and time on thermal stability which containanion-exchange properties and morphology. So the condition ofmost crystallinity can be obtained. Moreover, the mechanism ofultrasonic on reaction system can also be discussed. ⑵ Mesostructured hexagonal nickle aluminum oxides were firstsuccessfully prepared in this paper. The hexagonal mesoporousnickel aluminum oxides with x=0.625 (x=Al/(Al+Ni) molar ratio)was converted into an ordered porous material by the anionexchange of alkyl sulfate surfactants with acetate ions. And in thiscase, the layer to hexagonal transition was investigated. To oursurprise, the hexagonal mesoporous nickel aluminum oxides withx=0.500 undergo its transition from amorphous to hexagonal phaseduring the calcination at high temperature.