Salicylic acid surface modified nano-tio2 magnetic composite material and preparation method
A magnetic composite material and surface modification technology, applied in the field of nanomaterials, can solve the problems of poor heavy metal ion adsorption capacity, inability to utilize visible light, difficult catalyst separation, etc., to enhance visible light photocatalysis and adsorption capacity, avoid adverse effects, high The effect of permeability
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[0039] Such as figure 1 Shown, the salicylic acid surface modification nano-TiO of the embodiment of the present invention 2 The preparation method of magnetic composite material comprises the following steps:
[0040] S101: Weigh a certain amount of FeSO 4 ·7H 2 O and NiCl 2 ·6H 2 O and KBH 4 , respectively dissolved in a certain volume of ethanol-water mixed system, under the protection of nitrogen, mixed and stirred, the KBH 4 The solution was quickly added dropwise to the above system, stirred, separated, vacuum filtered, and the black product was dried to obtain a nano-Fe / Ni alloy, which was filled with nitrogen and sealed for storage for later use;
[0041] S102: Weigh a certain amount of Fe / Ni, add a certain amount of ethanol-water mixed system, and prepare SiO by coating method 2 @Fe / Ni core-shell nanoparticles;
[0042] S103: Weigh a certain amount of SiO 2 @Fe / Ni, add 1ml n-tetrabutyl titanate and 35mL ethanol, ultrasonically disperse for about 10min, prepar...
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