Carbon-based manganese composite material, preparation method and application of carbon-based manganese composite material

A carbon-based manganese composite material and manganese composite material technology, applied in the field of environmental organic pollution remediation, can solve problems such as the difficulty in processing super-accumulated plant biomass, achieve high practical application value, be environmentally friendly, and avoid secondary pollution.

Active Publication Date: 2020-08-18
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a carbon-based manganese composite material and its preparation method and application. The preparation method uses hyperaccumulative plants as raw materials to prepare carbon-based manganese nanomaterials or carbon-based manganese single-atom materials, which can reduce The manufacturing cost of nanomaterials or single-atom materials can make full use of a large amount of biomass with high metal content produced in the phytoremediation process, effectively avoiding the potential secondary pollution in phytoremediation, and solving the problem of excessive accumulation of plant biomass in phytoremediation. Difficult Matter of Substance Handling

Method used

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  • Carbon-based manganese composite material, preparation method and application of carbon-based manganese composite material

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preparation example Construction

[0034] The invention provides a method for preparing a carbon-based manganese composite material, comprising the following steps:

[0035] The above-ground and underground parts of manganese hyperaccumulator plants are pyrolyzed to obtain carbon-based manganese composite materials;

[0036] When the raw material is the aerial part of manganese hyperaccumulator plants, the carbon-based manganese composite material is a carbon-based manganese oxide nanomaterial;

[0037] When the raw material is the underground part of manganese hyperaccumulation plants, the carbon-based manganese composite material is a carbon-based manganese single-atom composite material.

[0038] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0039] In the invention, the above-ground part and the underground part of the manganese hyperaccumulating plant are pyrolyzed respectively. In the ...

Embodiment 1

[0057] The hyperaccumulative plant used in this example is Pokeweed, which was collected from the surrounding site of an electroplating enterprise in Jingjiang City, Jiangsu Province.

[0058] After distinguishing the collected pokeweed biomass according to the above-ground part and the underground part, the above-ground part and the underground part were dried in a blast drying oven at 80 °C until the quality did not change, and then a small pulverizer was used to Grinding the dried biomass until the obtained biomass particles can pass through a 60-mesh sieve, and taking the under-sieve to obtain the crushed aerial part biomass and the crushed underground part biomass, which are set aside.

[0059] According to "Digestion Microwave Digestion Method of Total Metal Elements in Soil and Sediment (HJ 832-2017)" and "Determination of Water Quality Iron and Manganese by Flame Atomic Absorption Spectrophotometry (GB 11911-89)", the underground part of the biomass obtained from pulver...

Embodiment 2

[0077] This embodiment selects Pokeweed from the same source as in Example 1, and selects the pulverized aerial part biomass prepared in Example 1 to prepare a carbon-based manganese composite material:

[0078] The difference between this embodiment and Embodiment 1 is that the pyrolysis temperature is 550° C., and the others are the same as in Embodiment 1.

[0079] Performance Testing

[0080] 1) The carbon-based manganese composite material prepared in Example 2 is characterized by HRTEM, and the results are shown in Figure 6 ,Depend on Figure 6 It can be seen that in the carbon-based manganese composite material prepared in this embodiment, manganese exists in the form of manganese oxide nanoparticles in the carbon substrate, and the diameter of the manganese oxide nanoparticles is 2-5 nm.

[0081] 2) The carbon-based manganese composite material prepared in Example 2 is characterized by X-ray absorption spectrum based on synchrotron radiation, and the results are as ...

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Abstract

The invention provides a carbon-based manganese composite material, a preparation method and application of the carbon-based manganese composite material and belongs to the technical field of environmental organic pollution remediation. Biomass of hyperaccumulated plants in phytoremediation is used as a raw material; based on inherent attributes of the biomass of the hyperaccumulated plants, the carbon-based manganese nano material or the carbon-based manganese monatomic material can be prepared through one-step pyrolysis; and therefore, the manufacturing cost of the nano material or the monatomic material can be reduced, and a large amount of biomass with high metal content generated in the phytoremediation process can be fully utilized, the problem of potential secondary pollution in phytoremediation is effectively avoided, the problem of difficult treatment of the biomass of the hyperaccumulated plants in phytoremediation is solved, and the development and application of the phytoremediation technology are objectively promoted. The prepared carbon-based manganese composite material has efficient photocatalytic capability, can be used as an environmental remediation material to be applied to the remediation of dye-containing wastewater, and can realize complete degradation of dye-containing organic pollutants under the action of sunlight.

Description

technical field [0001] The invention relates to the technical field of environmental organic pollution remediation, in particular to a carbon-based manganese composite material and its preparation method and application. Background technique [0002] Hyperaccumulative plants refer to a class of plants that can grow in heavy metal-rich soils and store very high concentrations of heavy metals in plants. These plants can store high concentrations of heavy metals without causing biotoxicity to the plants themselves. More than 500 species of hyperaccumulative plants have been discovered, among which Pokeweed (Phytolacca americana) can enrich heavy metals such as manganese, and is a common hyperaccumulative plant. Pokeweed has a very high ability to enrich manganese, and the manganese is mainly concentrated in the aboveground part. The enrichment of manganese in the leaves can reach more than 1% of the dry weight of the leaves, and the manganese enrichment in the roots is relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J27/24B01J37/08C02F1/30
CPCB01J23/34B01J27/24B01J37/084B01J37/082C02F1/30C02F2101/308C02F2305/10B01J35/23B01J35/39
Inventor 崔培昕王玉军刘存杨强
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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