A multi-element metal oxide mesoporous material
A technology of mesoporous material and multi-element metal is applied in the field of multi-element metal oxide mesoporous material, which can solve the problems of narrow absorption frequency band and high density, and achieve the effect of improving wave absorption performance and simple preparation method.
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Embodiment 1
[0017] Take x=1, namely n(MgCl 2 ·6H 2 O): n(AlCl 3 ): n(FeCl 3 ·6H 2 O)=1:1:9.
[0018] 1) First, add 5 grams of mesoporous foamed silica into 50 grams of chloroform, ultrasonically disperse for 4 hours, and then add 0.09mol FeCl 3 ·6H 2 O, 0.01molAlCl 3 and 0.01molMgCl 2 ·6H 2 O, add ammonia solution with a mass fraction of 10% to adjust the pH of the solution to 8, stir for 2 hours, let stand for 1 hour, filter, wash with water and dry to obtain nanopowder.
[0019] 2) Carry out high-temperature calcination on the dried nano-powder: under the protection of nitrogen atmosphere, heat from room temperature to 800 ° C, the heating rate is 6 ° C / min, maintain 800 ° C for 1 hour, and finally cool down with the furnace under the protection of nitrogen gas , the prepared multi-element metal oxide mesoporous material is MgAlFe 9 o 16 .
Embodiment 2
[0021] Take x=0, namely n(MgCl 2 ·6H 2 O): n(FeCl 3 ·6H 2 O)=1:10.
[0022] 1) First, add 5 grams of mesoporous foamed silica to 50 grams of chloroform, ultrasonically disperse for 6 hours, and then add 0.1mol FeCl 3 ·6H 2 O and 0.01mol MgCl 2 ·6H 2 O, add ammonia solution with a mass fraction of 15% to adjust the pH of the solution to 10, stir for 5 hours, let stand for 3 hours, filter, wash with water and dry to obtain nanopowder.
[0023] 2) Carry out high-temperature calcination on the dried nano-powder: under the protection of nitrogen atmosphere, heat from room temperature to 800 ° C, the heating rate is 6 ° C / min, maintain 800 ° C for 1 hour, and finally cool down with the furnace under the protection of nitrogen gas , the prepared multi-element metal oxide mesoporous material is MgFe 10 o 16 .
Embodiment 3
[0025] Take x=0.5, namely n(MgCl 2 ·6H 2 O): n(AlCl 3 ): n(FeCl 3 ·6H 2 (0)=1:0.5:9.5.
[0026] 1) First, add 5 grams of mesoporous foamed silica into 50 grams of chloroform, ultrasonically disperse for 5 hours, and then add 0.095mol FeCl 3 ·6H 2 O, 0.005molAlCl 3 and 0.01molMgCl 2 ·6H 2 O, adding a mass fraction of 15% ammonia solution to adjust the pH of the solution to 9, stirring for 3 hours, standing for 2 hours, filtering, washing and drying to obtain nanopowder.
[0027] 2) Carry out high-temperature calcination on the dried nano-powder: under the protection of nitrogen atmosphere, heat from room temperature to 800 ° C, the heating rate is 6 ° C / min, maintain 800 ° C for 1 hour, and finally cool down with the furnace under the protection of nitrogen gas , the prepared multi-element metal oxide mesoporous material is MgAl 0.5 Fe 9.5 o 16 .
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