Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing porous carbon-coated magnetic nanometer molten iron treatment composite material

A magnetic nano-composite material technology, used in water/sewage treatment, oxidized water/sewage treatment, reduced water/sewage treatment, etc., can solve the problems of less application and high pyrolysis temperature, reduce consumption, extend service life, The effect of reducing cost and investment

Active Publication Date: 2021-06-22
BEIJING FORESTRY UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned porous carbon-coated materials can be prepared by one-step pyrolysis of MOF, but the pyrolysis temperature required for the preparation is relatively high; the prepared materials are mostly used in electrode materials, but they are rarely used in environmental water treatment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing porous carbon-coated magnetic nanometer molten iron treatment composite material
  • A method for preparing porous carbon-coated magnetic nanometer molten iron treatment composite material
  • A method for preparing porous carbon-coated magnetic nanometer molten iron treatment composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Method for preparing porous carbon-coated magnetic nanometer molten iron treatment composite material by low-temperature pyrolysis MOF

[0022] Take 10g of urea in an alumina crucible with a cover, place it in a muffle furnace, raise it from room temperature to 550°C at a heating rate of 2°C / min, keep it at this temperature for 4h, and cool it down to room temperature naturally block g-C 3 N 4 , then block the g-C 3 N 4 Grind into powder; 0.674g FeCl 3 ·6H 2 O. Add 0.415g terephthalic acid and 56mL N,N-dimethylformamide into the beaker, stir at room temperature until it becomes a transparent solution; take the synthesized g-C 3 N 4 Take 392 mg and add it to the solution under stirring, after ultrasonic dispersion for 30 minutes, stir at room temperature for 30 minutes to obtain a suspension; transfer the suspension to a high-pressure reactor with a polytetrafluoroethylene liner, seal it with a stainless steel shell, and put it in oven at 443K for 24 hou...

Embodiment 2

[0024] Porous carbon-coated magnetic nanometer molten iron treatment composite material prepared in Example 2 removes organic pollutants in water

[0025] Use a 250mL beaker as the reactor, configure 200mL of the reaction solution, adjust the pH of the solution to 7.0 with 0.1mol / L NaOH, wherein the catalyst dosage is 50mg / L, the concentration of sodium persulfate is 0.65mmol / L, and the organic pollutant benzo The concentration of caine was 10 mg / L, and the reaction was carried out with sufficient stirring at room temperature for 1 h.

[0026] The activated persulfate of the carbon-coated magnetic nano-iron composite material in this embodiment can effectively oxidize and degrade benzocaine in water, and the benzocaine can be basically completely removed after 1 hour of reaction. Depend on image 3 It can be seen that the effect of activated persulfate degrading pollutants by carbon nitride alone is not good, and the effect of degrading persulfate activated by metal-organic f...

Embodiment example 3

[0027] Implementation Case 3 Preparation of Porous Carbon-Coated Magnetic Nano Iron Water Treatment Composite Material Reduction of Oxygenated Salts in Water

[0028] The porous carbon-coated magnetic nanometer molten iron treatment composite material prepared in Example 1 was used as a reducing agent to remove bromate in water, and a conical flask with a capacity of 300mL was selected as the reactor, and then BrO with a concentration of 7.81μmol / L 3 - Add the solution into the reactor, then add 500mg / L reducing agent into the reactor, stopper the bottle tightly after adding, then vibrate at room temperature at 200r / min, take water samples regularly and filter them through a 0.45μm filter membrane Quantitative analysis of BrO by ion chromatography 3 - and Br- concentration, the result is as Figure 4 . Figure 4 It shows that the porous carbon-coated magnetic nanometer molten iron treatment composite material of the present invention can effectively remove bromate in water...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing a porous carbon-coated magnetic nanometer molten iron treatment composite material by low-temperature pyrolysis metal-organic framework (MOF) and an application method in water treatment. The present invention utilizes urea to prepare graphite phase carbon nitride (g-C 3 N 4 ), followed by in-situ coupling with iron-containing MOFs, and finally, low-temperature pyrolysis in an inert atmosphere to prepare porous carbon-coated magnetic nanometer molten iron composites. In the composite material obtained by the present invention, the iron element is mainly zero-valent iron and γ-Fe 2 o 3 The form exists in the porous carbon, which has excellent magnetic properties and is easy to magnetically separate. The porous carbon layer can not only realize the slow release of active iron and avoid the generation of iron sludge, but also benefit the interface adsorption, catalytic oxidation and reduction reactions. The composite material can not only efficiently activate peroxide oxidants to achieve efficient degradation of trace organic pollutants such as drugs and personal care products in urban domestic sewage, but also complete the purification and detoxification of various oxo-salt wastewater through efficient interface reduction. .

Description

technical field [0001] The invention relates to the fields of new material technology and environmental protection, in particular to a method for preparing a porous carbon-coated magnetic nanometer hot metal treatment composite material by low-temperature pyrolysis of a metal-organic framework. Background technique [0002] Porous carbon-coated metal nanoparticles have a special coating structure. The closed space formed by the coated carbon layer in this structure isolates the coated metal particles from the external environment, which can protect the environmentally sensitive metal materials, thereby continuously exerting the characteristics of the metal materials. In practical applications, the porous carbon-coated metal nanoparticles can not only use the structure and interface adsorption characteristics of the porous carbon layer, but also use the characteristics of the active metal coated inside, so that this composite material combines all single components. Excellen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/70C02F101/30
CPCC02F1/705C02F1/722C02F1/725C02F2101/30
Inventor 齐飞刘超柳力元田幸
Owner BEIJING FORESTRY UNIVERSITY