Preparation method of magnetic composite nanomaterial , product prepared by the method, and application thereof

A composite material and magnetic nanotechnology, applied in the direction of alkali metal compounds, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of large separation of fluorine ions, easy aggregation of nanoparticles, and reduction of adsorption capacity, etc., to achieve preparation The method is simple, the cost is low, and the effect of improving the adsorption efficiency

Active Publication Date: 2013-11-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when nanomaterials are added to water, there are two main problems: first, nanoparticles are easy to aggregate, and the added nanoparticles quickly aggregate into large particles of alumina, which greatly reduces the adsorption capacity; secondly, nanoparticles adsorb fluoride ions in water Separation is a big problem

Method used

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  • Preparation method of magnetic composite nanomaterial , product prepared by the method, and application thereof
  • Preparation method of magnetic composite nanomaterial , product prepared by the method, and application thereof
  • Preparation method of magnetic composite nanomaterial , product prepared by the method, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) 1.0g Fe(NO 3 ) 3 and 2.67g sodium citrate are dissolved in 37ml ethylene glycol respectively, and the mass ratio is 1: 2.67, wherein the mass concentration of inorganic iron salt and citrate is 10%, after mixing, move into stainless steel to add polytetrafluoroethylene reaction kettle In the process, the reaction kettle was tightened, heated to 180° C., and reacted for 8 hours to obtain an inorganic magnetic microsphere solution.

[0037] (2) The inorganic magnetic microsphere solution that step (1) is obtained is dispersed in 370ml deionized water, and the volume ratio of inorganic magnetic microsphere solution and deionized water is 1: 10, utilizes magnetic field to separate washing, then disperses in 0.05mol / In L sulfuric acid solution, sonicate for 10min, then use magnet to separate out the magnetic microspheres treated with strong acid, and wash 3 times with deionized water; then add in the mixed solution of ethanol and water, the volume ratio of ethanol and ...

Embodiment 2

[0043] (1) 0.80g FeCl 3 ·6H 2 O and 2.4g sodium citrate are dissolved in 32ml ethylene glycol respectively, and the mass ratio is 1: 3, wherein the mass concentration of inorganic iron salt and citrate is 10%, after mixing, move into stainless steel to add polytetrafluoroethylene reaction kettle In the process, the reaction kettle was tightened, heated to 250° C., and reacted for 8 hours to obtain an inorganic magnetic microsphere solution.

[0044] (2) The inorganic magnetic microsphere solution that step (1) is obtained is dispersed in 160ml deionized water, and the volume ratio of inorganic magnetic microsphere solution and deionized water is 1: 5, utilizes magnetic field to separate washing, then disperses in 0.15mol / In L hydrochloric acid solution, sonicate for 40min, then use magnet to separate the magnetic microspheres through strong acid treatment, and wash 5 times with deionized water; then add in the mixed solution of ethanol and water, the volume ratio of ethanol ...

Embodiment 3

[0050] (1) 1.60g FeCl 3 ·6H 2 O and 4.0 sodium citrate are respectively dissolved in 56ml of ethylene glycol, the mass ratio is 2:5, wherein the mass concentration of inorganic iron salt and citrate is 10%, add in the reactor and mix, heated to 200°C, react The time is 8h, and the inorganic magnetic microsphere solution is obtained;

[0051] (2) The inorganic magnetic microsphere solution that step (1) is obtained is dispersed in 560ml deionized water, and the volume ratio of inorganic magnetic microsphere solution and deionized water is 1: 10, utilizes magnetic field to separate washing, then disperses in 0.05mol / In L hydrochloric acid solution, ultrasonically act for 10 minutes, then use a magnet to separate the magnetic microspheres treated with strong acid, and wash them with deionized water for 3 to 5 times; then add them to the mixed solution of ethanol and water, the volume ratio of ethanol and water is 1:1, under stirring, add sodium hydroxide to adjust the pH to 9....

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Abstract

The invention belongs to the technical field of composite nanomaterials and discloses a method for preparing a magnetic composite nanomaterial, a product prepared by the method, and application of the magnetic composite nanomaterial. The particle size of the magnetic composite nanomaterial prepared by the method is 250nm to 600nm, and the magnetic hysteresis loop is 18.5emu / g to 67.5emu / g. The method for removing fluorine ions from water by using the magnetic composite nanomaterial comprises the following steps: adding the magnetic composite nanomaterial to a water solution containing 5 to 25mg / L of fluorine ions, controlling the concentration of fluorine ions within the range of 50 mg / L to 200 mg / L, oscillating at 15 DEG C to 25 DEG C for 3 to 6 hours, performing magnetic separation in an external magnetic field for 3 to 10min, and measuring the concentration of fluorine ions in the supernatant. The composite nanomaterial is easy to be prepared with low cost and strong controllability, has a good function of adsorbing fluorine ions in water, and has a high adsorption capacity up to 80mg / g to 120mg / g under such a condition that the pH is neutral. The method can easily remove fluorine ions from water by adsorption and ensure that the water can meet the Standards for Drinking Water Quality GB5749-2006.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and relates to a preparation method of magnetic nanocomposite materials, products prepared by the method and applications thereof. Background technique [0002] Common inorganic anion pollutants in drinking water mainly include fluorine, arsenic and selenium ([1] Cansheng Zhu, Guanglu Bai, Xiaoli Liu, Yue Li, Screening high-fluoride and high-arsenic drinking waters and surveying endemic fluorosis and arsenism in Shaanxi province in western China, Water Research, 2006, 40(16): 3015-3022. [2] Rani Devi, Esayas Alemayehu, Vijender Singh, Ashok Kumar, Embialle Mengistie, Removal of fluoride, arsenic and coliform bacteria by modified homemade filter media from drinking water, Bioresource Technology, 2008, 99(7): 2269-2274. [3] Nimrod Bleiman, Yael G. Mishael, Selenium removal from drinking water by absorption to chitosan-clay composites and oxides: Bach and columns tests, Journal of H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28
Inventor 唐玉霖王祎龙于水利
Owner TONGJI UNIV
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