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Preparation method of cysteine-functionalized magnetic hollow manganese ferrite nano composite adsorbent

A manganese ferrite nanometer, cysteine ​​technology, applied in chemical instruments and methods, alkali metal compounds, inorganic chemistry and other directions, can solve problems such as low adsorption efficiency, and achieve the effects of saving resources, reducing costs, and high yield

Active Publication Date: 2019-04-05
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cysteine-functionalized magnetic hollow MnFe for the deficiencies and low adsorption efficiency of existing nanomaterial synthesis methods with hollow structures. 2 o 4 Nanocomposite Adsorbent H-MnFe 2 o 4 The preparation method of -Cys

Method used

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Embodiment 1

[0034]A preparation method of a cysteine-functionalized magnetic hollow manganese ferrite nanocomposite adsorbent, comprising the following steps:

[0035] Step 1, MnFe 2 o 4 Preparation of magnetic particles

[0036] Weigh 2.5 mmol MnCl 2 4H 2 O and 5 mmol FeCl 3 ·6H 2 O was dissolved in 20mL of ethylene glycol, stirred and mixed until the solution was clear, and then 3.6g of CH was added to the solution 3 COONa and 1.2g polyethylene glycol were stirred rapidly for 30 minutes, then the solution was transferred to a 25mL polytetrafluoroethylene stainless steel autoclave, and the temperature was gradually raised to 200°C and kept for 8h; cooled to room temperature, the resulting product was washed and vacuum Drying to produce spherical MnFe of 150~250nm 2 o 4 Nanoparticles, whose saturation magnetization is 73.5~81.1 emu / g;

[0037] Step 2. Magnetic Hollow MnFe 2 o 4 Preparation of nanoparticles

[0038] Weigh 0.5g of spherical MnFe prepared in step one 2 o 4 Nano...

Embodiment 2

[0042] A preparation method of a cysteine-functionalized magnetic hollow manganese ferrite nanocomposite adsorbent, comprising the following steps:

[0043] Step 1, MnFe 2 o 4 Preparation of magnetic particles

[0044] Weigh 2.5 mmol MnCl 2 4H 2 O and 5 mmol FeCl 3 ·6H 2 O was dissolved in 20mL of ethylene glycol, stirred and mixed until the solution was clear, and then 3.6g of CH was added to the solution 3 COONa and 1.2g polyethylene glycol were stirred rapidly for 30 minutes, then the solution was transferred to a 25mL polytetrafluoroethylene stainless steel autoclave, and the temperature was gradually raised to 200°C and kept for 8h; cooled to room temperature, the resulting product was washed and vacuum Drying to produce spherical MnFe of 150~250nm 2 o 4 Nanoparticles, whose saturation magnetization is 73.5~81.1 emu / g;

[0045] Step 2. Magnetic Hollow MnFe 2 o 4 Preparation of nanoparticles

[0046] Weigh 0.5g of spherical MnFe prepared in step one 2 o 4 Nan...

Embodiment 3

[0050] A preparation method of a cysteine-functionalized magnetic hollow manganese ferrite nanocomposite adsorbent, comprising the following steps:

[0051] Step 1, MnFe 2 o 4 Preparation of magnetic particles

[0052] Weigh 2.5 mmol MnCl 2 4H 2 O and 5 mmol FeCl 3 ·6H 2 O was dissolved in 20mL of ethylene glycol, stirred and mixed until the solution was clear, and then 3.6g of CH was added to the solution 3 COONa and 1.2g polyethylene glycol were stirred rapidly for 30 minutes, then the solution was transferred to a 25mL polytetrafluoroethylene stainless steel autoclave, and the temperature was gradually raised to 200°C and kept for 8h; cooled to room temperature, the resulting product was washed and vacuum Drying to produce spherical MnFe of 150~250nm 2 o 4 Nanoparticles, whose saturation magnetization is 73.5~81.1 emu / g;

[0053] Step 2. Magnetic Hollow MnFe 2 o 4 Preparation of nanoparticles

[0054] Weigh 0.5g of spherical MnFe prepared in step one 2 o 4 Nan...

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Abstract

The invention discloses a preparation method of a cysteine-functionalized magnetic hollow manganese ferrite nano composite adsorbent. The preparation method includes preparation of MnFe2O4 magnetic particles, preparation of magnetic hollow MnFe2O4 nano particles and surface cysteine functionalization of the magnetic hollow MnFe2O4 nano particles and other steps; MnFe2O4 having particle size of 150-250 nm is used as a base to prepare a hollow composite by using a mixed acid as an etching preparation; the hollow composite reaches 10-45 nm in pore size, 26.67-92.08 m<2> / g in specific surface area, and 32.4-41.18 emu / g in saturated magnetization intensity; in addition, the inner and outer surfaces of the hollow structure are subjected to cysteine functionalization at the same time; the hollowcomposite can better adsorb lead, chromium and other heavy metal ions to 79-81.5%. The preparation method herein is derived from traditional hydrothermal processes; the process is simple, and the yield is high; as the need of traditional preparation of mesoporous materials for adding a pore-forming agent template is omitted, the process steps are simplified, resources are saved, and the cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and relates to a magnetic hollow MnFe functionalized by cysteine 2 o 4 Nanocomposite Adsorbent H-MnFe 2 o 4 - a method for the preparation of Cys. Background technique [0002] If the content of heavy metals in the water body exceeds the standard, it will cause great harm to aquatic organisms and human health. Lead and chromium are commonly used heavy metals. Even at low concentrations, the human body and organisms are easily poisoned. Methods include electrochemical techniques, reverse osmosis, membrane filtration, ion exchange, and adsorption, among others. Adsorption is a simple, economical and effective method to remove waterborne pollutants. Commonly used adsorbents include activated carbon, clay minerals and chitosan-natural zeolite, etc. However, the separation process of such non-magnetic materials after adsorbing pollutants is relatively Difficult and often require tedious and ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30
CPCB01J20/06B01J20/20B01J20/22B01J20/28004B01J20/28009B01J20/28016B01J20/28021B01J2220/46B01J2220/4806B01J2220/4812
Inventor 张春金成召古义男靳晓东王丽萍
Owner LANZHOU JIAOTONG UNIV
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