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Method for preparing in-situ synthesis of sponge-supported iron oxide nanoparticle composites

A nanoparticle and composite material technology, applied in the field of material chemistry, can solve the problems that magnetic separation is not easy to achieve, and it is not enough to overcome the Brownian movement of particles, so as to achieve the effect of easy separation, recycling and reuse, low cost and small diffusion resistance

Active Publication Date: 2021-01-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the smaller the particle size, the harder it is to achieve magnetic separation (because the force of the magnetic field on particles is proportional to the particle size, when the particle size is too small, it is not enough to overcome the Brownian motion between particles, and magnetic separation cannot be achieved)

Method used

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  • Method for preparing in-situ synthesis of sponge-supported iron oxide nanoparticle composites
  • Method for preparing in-situ synthesis of sponge-supported iron oxide nanoparticle composites
  • Method for preparing in-situ synthesis of sponge-supported iron oxide nanoparticle composites

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Use a crusher to crush the blocky sponge into powder, wash it once with 0.2M hydrochloric acid solution, wash it several times with deionized water, put it in an oven at 40°C, and dry it for 24 hours for later use; prepare FeCl 3 .6H 2 O solution: 6.48g FeCl 3 .6H 2 Dissolve O in 0.2M hydrochloric acid solution and stir until it is completely dissolved, and pass nitrogen gas for 30-60 minutes; weigh 4g of washed and dried sponge powder, add 500mL 0.7M ammonia water, pass nitrogen gas for 45 minutes, and then heat the ammonia water Mix the system with sponge powder to 70°C, and keep nitrogen flowing; when the mixed system of ammonia water and sponge is heated to 70°C, add the prepared FeCl 3 .6H 2 O solution was stirred and reacted for 30min, then 2.44g FeCl was added 2 .4H 2 O powder, stirred rapidly and reacted at 70°C for 45min; after that, cooled to room temperature, separated the solid-liquid of the in-situ synthesized sponge-loaded iron oxide nanoparticle comp...

Embodiment 2

[0057] Use a crusher to crush the blocky sponge into powder, wash it once with 1.0M hydrochloric acid solution, wash it several times with deionized water, put it in an oven at 60°C, and dry it for 12 hours; prepare FeCl 3 .6H2O solution: 4.92g FeCl 3 .6H 2 O and 1.86 FeCl 2 .4H 2 O was dissolved in 0.2M hydrochloric acid solution and stirred until it was completely dissolved, and nitrogen gas was passed in for 60 minutes; 3 g of the cleaned and dried sponge powder was weighed, added to ammonia water, and nitrogen gas was passed in for 60 minutes; then, the mixed system of ammonia water and sponge was heated to 65 ℃, keep nitrogen flowing; when the mixed system of ammonia water and sponge is heated to 65 ℃, add the prepared FeCl 3 .6H 2 O and FeCl 2 .4H 2 O mixed solution was stirred and reacted for 45 min; after that, cooled to room temperature, the in situ synthesized sponge-loaded iron oxide nanoparticle composite material was separated from solid and liquid, and the ...

Embodiment 3

[0061] Use a crusher to crush the blocky sponge into powder, wash it once with 1.0M hydrochloric acid solution, wash it several times with deionized water, put it in an oven at 60°C, and dry it for 12 hours; prepare FeCl 3 .6H 2 O, FeCl 2 .4H 2 O and sponge solution: 3.24g FeCl 3 .6H 2 O and 1.24 g FeCl 2 .4H 2 O was dissolved in 0.2M hydrochloric acid solution and stirred until completely dissolved; Weighed 4g of prepared, washed and dried sponge powder, soaked in it, and passed nitrogen gas for 60 minutes; heated ammonia water to 70°C, continued to maintain nitrogen gas flow, and added the Prepared FeCl 3 .6H 2 O, FeCl 2 .4H 2 O and the sponge mixed solution were stirred and reacted for 30 minutes; after that, cooled to room temperature, the in-situ synthesized sponge-loaded iron oxide nanoparticle composite material was separated from solid and liquid, and the excess ammonia solution on the surface was cleaned with deionized water, and then cleaned once with deioni...

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Abstract

The invention discloses a sponge supported iron oxide nanoparticle composite material synthesized in situ and a preparation method of the composite material. The preparation method comprises the following steps: (1) performing crushing treatment on a sponge to obtain sponge powder; (2) performing cleaning treatment on the sponge powder, and performing drying; (3) mixing the sponge powder subjectedto cleaning treatment, a strong alkaline solution and an iron salt, and performing a reaction to synthesize iron oxide nanoparticles in situ in the pores of the sponge; and (4) performing filtrationon the mixture obtained in the step (3), performing washing, and performing drying to obtain the sponge supported iron oxide nanoparticle composite material. The method provided by the invention has simple operation and low costs, and the prepared sponge supported iron oxide nanoparticle composite material has higher adsorption capacity and better stability to arsenic As(V) and As(III), and is easy to separate and recover.

Description

technical field [0001] The invention belongs to the field of material chemistry, in particular, the invention relates to a method for preparing in-situ synthetic sponge-loaded iron oxide nanoparticle composite material. Background technique [0002] The U.S. Centers for Disease Control (CDC) and the International Agency for Research on Cancer (LARC) have classified arsenic as a Class I carcinogen. In my country, the problem of endemic arsenic poisoning is very serious. According to statistics from the Chinese Academy of Preventive Medicine, the number of people drinking groundwater containing arsenic (mass concentration ≥ 10 μg / L) is as high as 14.66 million. Groundwater has a lower redox potential, where As(III) is more prevalent than As(V), and As(III) is 100 times more toxic than As(V). As(III) is difficult to remove by coagulation and precipitation, and the efficiency is generally in the range of 46% to 84%. Therefore, the removal of As(III) becomes a technical proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/06B01J20/26B01J20/28026C02F1/288C02F2101/103
Inventor 解跃峰何柳王小
Owner TSINGHUA UNIV
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