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Manganese dioxide nano material and preparation method thereof, and application of manganese dioxide nano material in adsorption of organic dye

A technology of nanomaterials, manganese dioxide, applied in the adsorption of organic dyes, in the field of manganese dioxide nanomaterials, can solve the problems of small specific surface area, long contact time, poor adsorption, etc., and achieve easy-to-obtain raw materials, low cost, The effect of little pollution

Inactive Publication Date: 2021-10-19
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some problems with it as an adsorbent at present, such as small specific surface area, long contact time and poor adsorption.

Method used

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  • Manganese dioxide nano material and preparation method thereof, and application of manganese dioxide nano material in adsorption of organic dye
  • Manganese dioxide nano material and preparation method thereof, and application of manganese dioxide nano material in adsorption of organic dye
  • Manganese dioxide nano material and preparation method thereof, and application of manganese dioxide nano material in adsorption of organic dye

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Experimental program
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preparation example Construction

[0033] The application also provides a method for preparing manganese dioxide nanomaterials, comprising the steps of:

[0034] Prepare 1,2-butanediol aqueous solution and potassium permanganate aqueous solution respectively;

[0035] At room temperature, mix the above prepared solutions and stir until the purple color of the reaction solution disappears;

[0036] After filtering, washing with deionized water and alcohol, and drying, the manganese dioxide nanometer material is obtained.

[0037] Optionally: the molar ratio of 1,2-butanediol to potassium permanganate is 0.8-1.4.

[0038] Optionally: the concentrations of 1,2-butanediol and potassium permanganate aqueous solution are 0.03-0.05 mol / L and 0.18 mol / L respectively.

[0039] Optionally: in the stirring step, magnetic stirring or mechanical stirring or ultrasonic dispersion is used.

[0040] Optionally, the drying step includes: drying in a ventilated oven at an ambient temperature of 80° C. for 24 hours.

[0041] ...

Embodiment approach 1

[0043] At room temperature, mix 200 mL of 1,2-butanediol aqueous solution with a concentration of 0.045 mol / L and 40 mL of potassium permanganate aqueous solution with a concentration of 0.18 mol / L, stir or sonicate until the purple color of the solution disappears;

[0044] Filtrate, wash (with deionized water, alcohol) 3 to 5 times, and dry at 80°C to obtain the manganese dioxide nanomaterial.

[0045] Carry out transmission electron microscope (TEM) test to the manganese dioxide nano-material adsorbent that present embodiment 1 obtains, the obtained TEM figure is as follows figure 1 shown. Depend on figure 1 It can be seen that the prepared manganese dioxide nanomaterial has a nanoporous structure, specifically, it has a porous morphology formed by stacking nanoparticles with a particle size range of 30±5nm.

[0046] The manganese dioxide nanomaterial adsorbent that present embodiment 1 is obtained carries out infrared spectrum (FT-IR) test, and gained FT-IR is as follows...

Embodiment approach 2

[0052] a. At room temperature, mix 200mL of 1,2-butanediol aqueous solution with a concentration of 0.03mol / L and 40mL of potassium permanganate aqueous solution with a concentration of 0.18mol / L, stir or sonicate until the purple color of the solution disappears;

[0053] b. Filtrate, wash (with deionized water, alcohol) 3 to 5 times, and dry at 80°C to obtain manganese dioxide nanomaterials.

[0054] Add 15mg of the manganese dioxide nanomaterial adsorbent prepared in Example 2 to 30mL of methylene blue aqueous solution with a concentration of 140mg / L, stir at 25°C and 200r / min, take samples at different time points, centrifuge, and take the supernatant solution, using a UV spectrophotometer to measure the changes in the absorption spectrum of methylene blue at different processing time points, measure the absorbance at 664nm wavelength, and calculate the equilibrium adsorption capacity (q e ), see the result Figure 5 .

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Abstract

The invention belongs to the field of organic pollutant treatment, and relates to a manganese dioxide nano material, a preparation method of the manganese dioxide nano material and application of the manganese dioxide nano material in organic dye adsorption, wherein the manganese dioxide nano material has a granular morphology under a nano scale, a plurality of nano micropores are formed in the manganese dioxide nano material, and the manganese dioxide nano material has the characteristics of large specific surface area, large pore volume and the like. According to the invention, the manganese dioxide nano material as a wastewater treatment material has good wastewater treatment capacity, wherein the adsorption of the composite material to cationic dye methylene blue can reach balance within 10 minutes, and the adsorption capacity is high; and the problems that a conventional adsorbent is low in adsorption rate and adsorption capacity are solved, and the method is easy to industrialize due to the fact that raw materials are easy to obtain and high in yield.

Description

technical field [0001] The invention belongs to the field of organic pollutant treatment, and relates to a manganese dioxide nano material, a preparation method of the manganese dioxide nano material and an application of the manganese dioxide nano material in adsorbing organic dyes. Background technique [0002] With the rapid development of society and economy, organic dyes, as an important coloring agent, widely exist in industries such as leather goods, cosmetics, textiles, and papermaking. However, organic dyes are almost non-degradable in municipal sludge treatment plants. They are toxic to humans and even carcinogenic, thus posing an irreversible threat to the ecological environment and human health. Therefore, the removal of dyes in wastewater has also become a key issue in the field of organic pollutant treatment. The methods for dye removal in wastewater mainly include membrane filtration, oxidation, ionization and biological methods. The adsorption method is sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82Y40/00B01J20/06B01J20/28B01J20/30C02F1/28C02F101/30
CPCC01G45/02B82Y40/00B01J20/06B01J20/28007B01J20/28061B01J20/3085B01J20/3071C02F1/281C02F2101/308
Inventor 许伟领
Owner SHANGHAI UNIV
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