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Manganese dioxide@poly(m-phenylene diamine) composite material as well as preparation method and application thereof

A poly-m-phenylenediamine, manganese dioxide technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the influence of adsorption capacity, poor adsorption effect, permanganic acid The problem of high potassium consumption is to achieve the effect of strong affinity, good adsorption effect and efficient treatment

Inactive Publication Date: 2020-12-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent application 201610065134.0 synthesized iron ferric oxide@manganese dioxide@poly-m-phenylenediamine shell-core structure composite material is used for the adsorption of arsenic, but the existing technology has the following defects: 1. The amount of potassium permanganate used in the synthesis process Higher, there is a waste of resources; 2. Too low synthesis temperature of poly-m-phenylenediamine will affect the synthesis yield, resulting in poor adsorption effect
3. The pH in the synthesis process of poly-m-phenylenediamine is not regulated, which affects the oxidation process of m-phenylenediamine, resulting in affected adsorption capacity

Method used

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  • Manganese dioxide@poly(m-phenylene diamine) composite material as well as preparation method and application thereof
  • Manganese dioxide@poly(m-phenylene diamine) composite material as well as preparation method and application thereof
  • Manganese dioxide@poly(m-phenylene diamine) composite material as well as preparation method and application thereof

Examples

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preparation example Construction

[0059] The preparation method of the 2nd group embodiment, composite material of the present invention

[0060] This group of embodiments provides the preparation method of the manganese dioxide@poly-m-phenylenediamine composite material described in any one of the first group of embodiments, which is characterized in that it includes the following steps:

[0061] S1, ultrasonically dispersing m-phenylenediamine to obtain a dispersion of m-phenylenediamine;

[0062] S2. Mix the dispersion of m-phenylenediamine obtained in step S1 with an oxidant to carry out oxidation polymerization reaction to obtain a poly-m-phenylenediamine material;

[0063] S3. Disperse the poly-m-phenylenediamine material obtained in step S2 into water to obtain a colloidal dispersion, and add potassium permanganate solution to it for redox reaction to obtain manganese dioxide@poly-m-phenylenediamine shell-core structure composite material .

[0064] In some embodiments, the mass ratio of m-phenylenedi...

Embodiment 1

[0075] A manganese dioxide@poly-m-phenylenediamine composite material, including manganese dioxide and poly-m-phenylenediamine, wherein the manganese dioxide is supported on the surface of the poly-m-phenylenediamine, and is chemically combined with the poly-m-phenylenediamine.

[0076] In this embodiment, the loading capacity of poly-m-phenylenediamine is 30% of the mass of manganese dioxide@poly-m-phenylenediamine composite material, and the loading capacity of manganese dioxide is 30% of the mass of manganese dioxide@poly-m-phenylenediamine composite material. 70%, the two are linked by Mn-O-C bonds.

[0077] In this embodiment, the poly-m-phenylenediamine is spherical with smooth surface; the manganese dioxide@poly-m-phenylenediamine composite material is sea urchin with rough surface.

[0078] In this example, the manganese dioxide@poly-m-phenylenediamine composite material is dark brown powder.

[0079] A method for preparing the manganese dioxide@poly-m-phenylenediamin...

Embodiment 2

[0100] 1. The application of a manganese dioxide@poly-m-phenylenediamine composite material in the treatment of heavy metal wastewater, comprising the following steps:

[0101] Get the manganese dioxide@poly-m-phenylenediamine composite material (PM50, PM150, PM200, PM250) 5 mg each, respectively added to 20 mL of heavy metal wastewater with Pb concentration of 100 mg / L and pH of 5.3, placed in a constant temperature water bath at 25°C and 170 rpm for oscillating adsorption for 24 hours to complete the treatment of heavy metal wastewater.

[0102] 2. Get the comparative example PmPD and comparative example PM that are used in comparative example 3, the polym-phenylenediamine composite material (PmPD does not add NaOH) that does not add sodium hydroxide that makes in comparative example 4, embodiment Add 5 mg of each PM150 prepared in 1 to 20 mL of heavy metal wastewater with a Pb concentration of 50 mg / L and a pH of 5.3, and place it in a constant temperature water bath at 25°...

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Abstract

The invention discloses a manganese dioxide@poly(m-phenylene diamine) composite material as well as a preparation method and application thereof, and belongs to the field of environment-friendly adsorption materials. The manganese dioxide-poly (m-phenylene diamine) composite material comprises manganese dioxide and poly (m-phenylene diamine), and the manganese dioxide is loaded on the surface of the poly (m-phenylene diamine) to form a composite material with a shell-core structure; and the specific surface area of the manganese dioxide@poly(m-phenylene diamine) composite material is 150m<2> / g200m <2> / g. The manganese dioxide@poly(m-phenylene diamine) composite material has the advantages of low cost, easy synthesis, good adsorption performance and the like, can effectively adsorb heavy metals in wastewater, and has good use value and application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmentally friendly adsorption materials, and relates to a manganese dioxide@poly-m-phenylenediamine composite material and its preparation method and application. Background technique [0002] Water is a key factor for the survival of organisms, and water pollution is an important reason for the decline in public health. For decades, heavy metal pollution control has been a challenging problem in the field of water treatment. Heavy metal pollution is ubiquitous, and heavy metal ions cannot be degraded through natural biological processes, threatening the water environment and biological health. It can enter the aquatic environment through a variety of channels, including electroplating plants, mining industries, electronics manufacturing, inorganic pigment manufacturing, and wastewater discharged from wood processing industries. Heavy metals have strong chemical stability and biodegradability, can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/06B01J20/26B01J20/28011C02F1/281C02F1/285C02F2101/20B01J20/28B01J20/30C02F1/28
Inventor 袁兴中熊婷曹旭洋陈鸿鹄姚赛曾光明
Owner HUNAN UNIV
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