Fe3O4@poly(m-phenylenediamine)@MnO2 magnetic core-shell structure nanocomposite material and preparation and application methods thereof
A nanocomposite material, poly-m-phenylenediamine technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of few functional groups on the surface of magnetic iron nanoparticles and difficulty in achieving uniform loading of manganese oxide, etc. Achieve excellent adsorption performance, fast magnetic separation and recovery, and realize the effect of magnetic separation and recovery
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0037] In the presence of non-magnetic iron particles, sodium persulfate is used as the oxidizing agent to polymerize m-phenylenediamine monomer, the ratio of monomer to oxidizing agent is 1:1, and the polymerization reaction is 3 hours. The synthesized pure PmPD (poly-m-phenylene diamine) was combined with 20mM KMnO under different pH conditions. 4 For the reaction, the pH was controlled to 3, 2, and 1, respectively.
[0038] The TEM images of materials synthesized under different pH conditions are shown in figure 1 .
[0039] by figure 1 It can be seen that when pH=3, rough small fluffy substances appear on the surface of the particles in CD. As the pH decreases, the surface of the particles gradually becomes rougher, and the scale of the outer surface becomes deeper, indicating that new substances may be formed; pH= The structure of yolk-shell appears at 2, which may be KMnO 4 It reacts with the outer surface of PmPD first, and the reaction product is loaded on the outer surface...
Embodiment 2
[0041] Weigh the equivalent amount of m-phenylenediamine monomer and Na 2 S 2 O 8 Add Fe sequentially 3 O 4 In dispersion, Fe 3 O 4 The concentration of the dispersion is 0.5-2g / L, Fe 3 O 4 The mass ratio with m-phenylenediamine monomer is 2:1-1:4. The reaction is shaken under ice-water bath conditions; after the reaction, it is washed with water and ethanol and dried to obtain Fe 3 O 4 Poly-m-phenylenediamine nanoparticles; measure 100mL of deionized water, add a certain amount of 1M HCl to adjust the pH to 2, and weigh 0.1g Fe 3 O 4 The poly-m-phenylenediamine was ultrasonically dispersed in a solution with pH=2. Then respectively weigh 0.05g, 0.1g, 0.2g, 0.4g, 0.8g potassium permanganate and add to the above Fe 3 O 4 In the poly-m-phenylene diamine dispersion liquid, the shaking reaction for 5 hours, magnetic separation, washing 3 times with water, washing 2 times with anhydrous ethanol, and drying the washed sample at 60 ℃, to obtain Fe 3 O 4 Poly-m-phenylenediamine MnO 2 Mag...
Embodiment 3
[0047] At room temperature, prepare As(III) solutions of different concentrations and adjust the pH to 5.0±0.2 with HCl. Weigh 0.01g of the Fe prepared in Example 2 3 O 4 Poly-m-phenylenediamine MnO 2 The magnetic core-shell structure nanocomposite material was added to 20mLAs(III) solution, placed in a constant temperature water bath shaking box for adsorption experiment, the reaction time was 8h; solid-liquid separation was carried out under the action of an external magnetic field, filtered and collected, the As(III) in the filtrate The concentration of) is determined by ICP-OES. Different proportions of Fe 3 O 4 Poly-m-phenylenediamine MnO 2 The adsorption isotherm of the magnetic core-shell nanocomposite for As(III) is as Figure 4 Shown. It can be seen from this figure that as the initial concentration of the As(III) solution increases, the adsorption capacity increases. Compare different proportions of Fe 3 O 4 Poly-m-phenylenediamine MnO 2 Magnetic core-shell structure ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| concentration | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More