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Carbon-coated alpha-Fe2O3 material and preparation method and application thereof

A carbon coating, ferric nitrate technology, applied in catalyst activation/preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of secondary pollution of iron salts, low utilization rate of hydrogen peroxide, etc. Cost, good light Fenton oxidation performance, the effect of realizing industrial production

Pending Publication Date: 2021-07-09
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is in order to synthesize α-Fe with high-efficiency photo-Fenton performance 2 o 3 , to solve the problem of low utilization rate of hydrogen peroxide in the classic Fenton reaction, and the problem of secondary pollution caused by iron salts produced during the reaction

Method used

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  • Carbon-coated alpha-Fe2O3 material and preparation method and application thereof
  • Carbon-coated alpha-Fe2O3 material and preparation method and application thereof
  • Carbon-coated alpha-Fe2O3 material and preparation method and application thereof

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Embodiment 1

[0047] A template method of the present embodiment prepares carbon-coated α-Fe for photo-Fenton oxidation of various water pollutants 2 o 3 method, specifically as follows:

[0048] Add 0.0808g of ferric nitrate into a beaker containing 100mL of distilled water, stir in a water bath at 80°C for 30min, then add 1.26g of melamine into the above solution, and continue to stir rapidly for 30min; Adjust the pH value of the solution to pH = 1; take out the beaker and place it at room temperature to cool naturally for 60 minutes, as the temperature decreases, white flocculation precipitates out to obtain the precursor; move the precursor to the refrigerator (-25°C) to freeze , after freezing for 12 hours, take out the precursor and put it into a freeze dryer, and freeze-dry it for 24 hours under the conditions of -50°C and 50MPa to obtain a dry and loose yellow-white precursor. The scanning electron microscope shows figure 1 , the precursor has a rod-like shape; finally put the pre...

Embodiment 2

[0052] A template method of the present embodiment prepares carbon-coated α-Fe for photo-Fenton oxidation of various water pollutants 2 o 3 method, specifically as follows:

[0053] Add 0.0808g of ferric nitrate into a beaker containing 100mL of distilled water, stir in a water bath at 80°C for 30min; then add 1.26g of melamine into the above solution, and continue to stir rapidly for 30min; Adjust the pH value of the solution to pH = 1; take out the beaker and place it at room temperature to cool naturally for 60 minutes, as the temperature decreases, white flocculation precipitates out to obtain the precursor; move the precursor to the refrigerator (-25°C) to freeze , After freezing for 12 hours, take out the precursor and put it in a freeze dryer, and freeze-dry it for 24 hours under the conditions of -50°C and 50MPa to obtain a dry and loose yellow-white precursor; finally put the precursor into a crucible and move it to a muffle furnace Calcination, the calcination cond...

Embodiment 3

[0056] A template method of the present embodiment prepares carbon-coated α-Fe for photo-Fenton oxidation of various water pollutants 2 o 3 method, specifically as follows:

[0057] Add 0.0808g of ferric nitrate into a beaker containing 100mL of distilled water, stir in a water bath at 80°C for 30min, then add 1.26g of melamine into the above solution, and continue to stir rapidly for 30min; Adjust the pH value of the solution to pH = 1; take out the beaker and place it at room temperature to cool naturally for 60 minutes, as the temperature decreases, white flocculation precipitates out to obtain the precursor; move the precursor to the refrigerator (-25°C) to freeze , After freezing for 12 hours, take out the precursor and put it in a freeze dryer, and freeze-dry it for 24 hours under the conditions of -50°C and 50MPa to obtain a dry and loose yellow-white precursor; finally put the precursor into a crucible and move it to a muffle furnace Calcination, the calcination cond...

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Abstract

The invention discloses a carbon-coated alpha-Fe2O3 material and a preparation method and application thereof. The preparation method of the material comprises the steps that melamine and ferric nitrate are selected and added into distilled water, after the melamine is dissolved, the pH value of a reaction system is adjusted with inorganic acid, melamine is subjected to in-situ hydrolysis to generate cyanuric acid, then, melamine and cyanuric acid are self-assembled to form a template; thena precursor structure with a loose structure is obtained by adopting a freeze-drying mode, and finally the precursor structure is calcined in a muffle furnace to obtain the carbon-coated alpha-Fe2O3. The experimental method is simple, low in cost and capable of realizing large-scale synthesis. Compared with a classic Fenton reagent, the material is very stable and can be recycled, pollutants can be effectively oxidized within the pH range of 2-7, H2O2 is more effectively utilized, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to a carbon-coated α-Fe 2 o 3 materials, especially a template for the preparation of carbon-coated α-Fe for photo-Fenton oxidation of various water pollutants 2 o 3 material method. Background technique [0002] In today's world, with the growth of population, economic development and the advancement of industrial processes, more and more new pollutants appear, including substances such as medicines, medicines, pesticides, chlorophenols and endocrine disruptors. The continuous accumulation and enrichment have caused serious pollution to the water environment, and the pollutants in the water have passed through layers of food chains and eventually endangered human life and health. However, some studies have shown that the above-mentioned organic pollutants and their metabolites are not only toxic but also persistent and stubborn, and it is difficult to effectively remove them by traditional physical and chemical methods or bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/38
CPCB01J37/0009B01J23/745C02F1/725C02F1/722C02F2305/10C02F2101/38C02F2305/026B01J35/39
Inventor 蒋保江赵陈付宏刚井立强李富祥肖旭东付芸绮
Owner HEILONGJIANG UNIV
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