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Method for preparing manganese oxide nanowire by deposition on surface of natural porous diatomite

A technology of manganese oxide sodium rice noodles and porous silicon, applied in the field of materials, can solve problems such as the effect of heavy metal ion adsorption and removal efficiency

Inactive Publication Date: 2013-07-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the modification of diatomite has been performed by the mechanical mixing (disordered compound) of modifiers (iron salts, manganese salts, aluminum salts, organic matter, etc.) At the expense of the microporous structure, the adsorption and removal efficiency of heavy metal ions is greatly affected

Method used

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  • Method for preparing manganese oxide nanowire by deposition on surface of natural porous diatomite
  • Method for preparing manganese oxide nanowire by deposition on surface of natural porous diatomite
  • Method for preparing manganese oxide nanowire by deposition on surface of natural porous diatomite

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1. Weigh 4.2g of diatomaceous earth and suspend it in 50mL of water, and place it in a constant temperature water bath and stir to form a uniform suspension.

[0022] 2. Weigh 3.7g of ammonium persulfate and add it to the diatomite suspension, stir with constant temperature magnetic force to fully impregnate it into the diatomite, add 4.424g of potassium permanganate and continue stirring to fully react and then cool to room temperature.

[0023] 3. Transfer the solution to a reactor at 90°C for 12 hours in a water bath for aging, cool to room temperature, wash with deionized water and absolute ethanol several times, and dry.

Embodiment 2

[0025] 1. Weigh 4.2g of diatomaceous earth and suspend it in 50mL of water, and place it in a constant temperature water bath and stir to form a uniform suspension.

[0026] 2. Weigh 4.146g of ammonium persulfate and add it to the diatomite suspension, stir with constant temperature magnetic force to fully impregnate the diatomite, then add 4.957g of potassium permanganate and continue stirring at constant temperature for one hour to fully react and then cool to room temperature.

[0027] 3. Transfer the solution to a reactor in a water bath at 50°C for 24 hours for aging, cool to room temperature, wash with deionized water and absolute ethanol several times, and dry.

Embodiment 3

[0029] 1. Weigh 4.2g of diatomaceous earth and suspend it in 50mL of water, and place it in a constant temperature water bath and stir to form a uniform suspension.

[0030] 2. Weigh 3.06g of ammonium persulfate and add it to the diatomite suspension, stir it with a constant temperature magnetic force to fully impregnate it into the diatomite, then add 3.66g of potassium permanganate and continue stirring at a constant temperature for one and a half hours to fully react and then cool to room temperature .

[0031] 3. Transfer the solution to a reaction kettle for 16 hours in a water bath at 120°C for aging, cool to room temperature, wash with deionized water and absolute ethanol several times, and dry.

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Abstract

The invention discloses a method for preparing a manganese oxide nanowire by deposition on the surface of natural porous diatomite. The method is characterized by comprising the following steps: 1, weighing a diatomite powder body, placing the diatomite powder body into a beaker filled with water, placing the beaker into a water bath pond, and stirring to prepare a diatomite suspension solution; 2, weighing ammonium persulfate (NH4)2S2O8, placing ammonium persulfate (NH4)2S2O8 into the diatomite suspension solution, magnetically stirring for more than 30 min, fully impregnating into the diatomite, weighing KMnO4, placing KMnO4 into a mortar, fully grinding, dissolving in water, dripping into the diatomite suspension solution, continuing to stir for more than 30 min, and cooling to the room temperature; and 3, transferring the solution into a reaction kettle for water bath / hydrothermal reaction at the temperature of 50-160 DEG C, ageing, cooling to the room temperature, washing by de-ionized water and absolute ethanol for multiple times, and drying to obtain a final sample. According to the method, the adsorption efficiency of a composite material on heavy metal ions is improved; and the method is low in production cost, simple in operation process and easy for industrial production.

Description

technical field [0001] The invention relates to the field of materials, and relates to a method for depositing and preparing manganese oxide nanowires on the surface of diatom raw soil with a natural porous structure. Background technique [0002] Heavy metal ions and their compounds can cause severe pollution of crops and water bodies, and enter the human body through the biological chain, causing great harm to human health. The treatment of their pollutants has always attracted attention at home and abroad. At present, there are more than a dozen methods for the treatment of heavy metal polluted wastewater, but only the pharmaceutical method, electrocoagulation method, secondary membrane method and adsorption method can be applied on a large scale. In comparison, the adsorption method is simple, practical and widely used, but the application of the adsorption method is mainly limited by the adsorption performance of the material (adsorbent). Porous, large specific surface...

Claims

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Application Information

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IPC IPC(8): B01J20/14B01J20/30B01J20/28
Inventor 杜玉成王利平郑广伟王允庆王金淑吴俊书范海光
Owner BEIJING UNIV OF TECH
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