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Simple synthesis and application of manganese doped ferric oxide

A manganese doping, iron oxide technology, applied in iron oxide, iron oxide/iron hydroxide, other chemical processes, etc., can solve problems such as poor adsorption performance, and achieve the effects of large adsorption capacity, non-toxic material and simple composition

Inactive Publication Date: 2017-03-08
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional α-iron oxide nanostructure often has poor adsorption performance, so how to improve its adsorption performance has become a key factor restricting its large-scale application in the later stage.

Method used

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  • Simple synthesis and application of manganese doped ferric oxide
  • Simple synthesis and application of manganese doped ferric oxide
  • Simple synthesis and application of manganese doped ferric oxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] refer to Figure 1-Figure 4 The preparation method of the manganese-doped iron oxide nanostructure adopts the hydrothermal method, and the mixed solution formed by water / ethylene glycol / PVP (PVP: polyvinylpyrrolidone) is a solution, and the specific steps are:

[0031] Add 15g PVP to the mixed solution of 40ml water and 100ml ethylene glycol, stir to dissolve, and mix 8mmol FeSO 4 ·7H 2 O+2mmol Mn(CH 3 COO) 2 4H 2 O and 10 mmol H 2 C 2 o 4 Add the above mixed solution respectively, stir until completely dissolved, mix the two evenly, transfer the same amount to 7 high-pressure reactors, place the reactors at a temperature of 120°C for a constant temperature reaction for 12 hours, and then cool down. The product was obtained by centrifugation at a speed of 3 min / min. The obtained product was washed several times with distilled water and absolute ethanol, and then placed in a vacuum oven at 60° C. for 12 hours to dry. The resulting product was placed in a porcela...

Embodiment 2

[0034] The preparation method of the manganese-doped iron oxide nanostructure adopts a hydrothermal method, using a mixed solution composed of water / ethylene glycol / PVP (PVP: polyvinylpyrrolidone) as a solution, and the specific steps are:

[0035] Add 15g PVP to the mixed solution of 40ml water and 100ml ethylene glycol, stir to dissolve, and dissolve 9.5mmolFeSO 4 ·7H 2 O+0.5mmol Mn(CH 3 COO) 2 4H 2 O and 10 mmol H 2 C 2 o 4 Add the above mixed solution respectively, stir until completely dissolved, mix the two evenly, transfer the same amount to 7 high-pressure reactors, place the reactors at a temperature of 120°C for a constant temperature reaction for 12 hours, and then cool down. The product was obtained by centrifugation at a speed of 3 min / min. The obtained product was washed several times with distilled water and absolute ethanol, and then placed in a vacuum oven at 60° C. for 12 hours to dry. The resulting product was placed in a porcelain boat, and then cal...

Embodiment 3

[0037] The preparation method of the manganese-doped iron oxide nanostructure adopts a hydrothermal method, using a mixed solution composed of water / ethylene glycol / PVP (PVP: polyvinylpyrrolidone) as a solution, and the specific steps are:

[0038] Add 15g PVP to the mixed solution of 40ml water and 100ml ethylene glycol, stir to dissolve, and dissolve 9mmol FeSO 4 ·7H 2 O+1mmol Mn(CH 3 COO) 24H 2 O and 10 mmol H 2 C 2 o 4 Add the above mixed solution respectively, stir until completely dissolved, mix the two evenly, transfer the same amount to 7 high-pressure reactors, place the reactors at a temperature of 120°C for a constant temperature reaction for 12 hours, and then cool down. The product was obtained by centrifugation at a speed of 3 min / min. The obtained product was washed several times with distilled water and absolute ethanol, and then placed in a vacuum oven at 60° C. for 12 hours to dry. The resulting product was placed in a porcelain boat, and then calcine...

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Abstract

The invention discloses simple synthesis and an application of manganese doped ferric oxide and belongs to the technical field of adsorption and separation of dye in waste water. PVP (polyvinyl pyrrolidone) is added to a mixed solution of water and glycol at the room temperature and stirred to be dissolved, and a colorless and transparent solution is formed; Mn(CH3COO)2*4H2O and FeSO4*7H2O are added to the mixed solution in the step (1) and stirred to be dissolved completely; H2C2O4 is added to the mixed solution in the step (1) and stirred to be dissolved completely; the solution obtained in the step (2) and the solution obtained in the step (3) are mixed slowly and stirred at the room temperature until the mixture is mixed uniformly; the mixed solution obtained in the step (4) is transferred to an autoclave to react at the temperature of 120 DEG C for 12 h. The ingredients are simple, materials are non-toxic and inert, the manganese doped ferric oxide nanostructure is combined with CR (Congo red) mainly under the electrostatic interaction, and accordingly, compared with a chemical precipitation method, a biological method and the like, the method cannot cause secondary pollution.

Description

technical field [0001] The invention relates to the technical field of adsorption and separation of dyes in waste water, in particular to the simple synthesis and application of manganese-doped iron oxide. [0002] Background technique: [0003] Congo red (CR) is an important organic dye that is widely used in many industries. However, direct discharge of Congo red into natural water systems will cause serious environmental and health problems. The main methods currently used for CR removal in water bodies include: coagulation sedimentation method, biodegradation method, ion exchange method, chemical oxidation method, nanofiltration method and adsorption method. Among these methods, the adsorption method has attracted much attention due to its advantages of high efficiency, low cost, and simple operation. The method uses an adsorbent with a high specific surface area or a special functional group on the surface to effectively remove the Congo red in the waste water by means...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C01G49/06B82Y30/00C02F101/30
CPCB01J20/06B82Y30/00C01G49/06C01P2002/72C02F1/28C02F2101/308
Inventor 苏怀芬曾涑源孙得志
Owner LIAOCHENG UNIV