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Citation: ZHANG Li, ZHANG Jian, ZHANG Zulei, LIU Haiqing, LI Lei. Preparation of Magnetic Nanomaterials and Its Adsorption Properties Towards Cr₂O₇^2-[J]. Chinese Journal of Applied Chemistry, ;2013, 30(8): 927-931. doi: 10.3724/SP.J.1095.2013.20435 shu

Preparation of Magnetic Nanomaterials and Its Adsorption Properties Towards Cr₂O₇^2-

ZHANG Li ^a,b, ,
ZHANG Jian ^b ,
ZHANG Zulei ^b ,
LIU Haiqing ^b ,
LI Lei ^a,b

a. College of Chemistry and Chemical Engineering, Changzhou University, Changzhou 213016, China;
b. College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China

Received Date: 27 September 2012
Revised Date: 22 October 2012

Fe₃O₄ magnetic nanoparticles were first prepared using the coprecipitation method and were coated by SiO₂. Functional magnetic nanometer materials were then obtained through bonding polyethylenimine(PEI) on the surface of SiO₂ and quaternarization with benzyl chloride. Coating of SiO₂ could increase the dispersion and stability of Fe₃O₄ nanometer materials. FT-IR,SEM,TG and vibrating sample magnetometer were used to characterize the magnetic nanomaterials. The results showed that the synthesis of magnetic nanomaterials was successful. The static adsorption method was employed to study the adsorption properties of magnetic nanomaterials towards Cr₂O₇^2- and various factors which might influence the adsorption performance of the materials. The optimal conditions for the separation and enrichment environment of heavy chrome acid radical are:acid medium,the temperature is 25℃,potassium dichromate concentration is 0.8 g/L,the adsorption quantity for 120 mg/g,grafting,the greater the amount of adsorption quantity increase.
- magnetic nanomaterials,
- silica,
- polyethyleneimine,
- dispersion,
- stability
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Preparation of Magnetic Nanomaterials and Its Adsorption Properties Towards Cr₂O₇^2-