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A kind of sludge/cation clay multidimensional carbon nanomaterial and its preparation and application

A technology of carbon nanomaterials and cations, applied in nanocarbon and other directions, can solve the problems of little research, and achieve the effect of simple method, easy operation, and increase of added value.

Active Publication Date: 2019-08-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the preparation of sludge-based multidimensional carbon nanomaterials from clay mineral / sludge mixtures as electrode materials for supercapacitors.

Method used

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  • A kind of sludge/cation clay multidimensional carbon nanomaterial and its preparation and application
  • A kind of sludge/cation clay multidimensional carbon nanomaterial and its preparation and application
  • A kind of sludge/cation clay multidimensional carbon nanomaterial and its preparation and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of sludge / cation clay multidimensional carbon nanomaterial, comprises the following steps:

[0035] (1) Add 2.4g montmorillonite, 2.4g vermiculite and 2.4g kaolin into three parts of 100mL residual sludge liquid (solid content rate 24g / L) respectively, and stir for 30min to obtain three different mixed solutions; One part of 100mL residual sludge liquid (solid content rate: 24g / L), set aside;

[0036] (2) Add 12mL of 3mol / LZnCl to the three different mixtures obtained in step (1) and the remaining sludge liquid 2 The solution was stirred and activated for 24 hours, centrifuged (7 minutes at 3000 rpm), dried in an oven at 105°C for 24 hours, ground, and sieved with 200 mesh to obtain the activated mixture;

[0037] (3) pyrolyze the activated mixture at high temperature in nitrogen atmosphere, the pyrolysis temperature is 700°C (the pyrolysis time is 3h);

[0038] (4): step (3) is obtained pyrolysis product with hydrofluoric acid (the mass concentration of hydrof...

Embodiment 2

[0043] Electrochemical performance test of sludge / cation clay multidimensional carbon nanomaterials:

[0044]The first step: accurately weigh the sludge / cation clay multidimensional carbon nanomaterial (sludge / montmorillonite multidimensional carbon nanomaterial, sludge / vermiculite multidimensional carbon nanomaterial and sludge / kaolin multidimensional carbon nanomaterial) of 0.02g embodiment 1 gained Carbon nanomaterials) add 1mL absolute ethanol and 10μL binder (nafion perfluorinated resin solutin), and fully sonicate (about 30min), so that the sludge / cation clay multidimensional carbon nanomaterials are completely dispersed;

[0045] Step 2: Use a pipette gun to take 10 μL of the dispersion obtained in the first step and drop it on the electrode, and it will be the working electrode after drying;

[0046] The third step: the electrochemical test is carried out on the electrochemical workstation, using a three-electrode system (the working electrode is an activated carbon el...

Embodiment 3

[0049] A kind of sludge / cation clay multidimensional carbon nanomaterial, comprises the following steps:

[0050] Step 1: Accurately weigh 4 parts of montmorillonite (2.4 g each) and add them to 100 mL of remaining sludge liquid (solid content 24 g / L), and stir for 30 min;

[0051] (2) Add 12 mL of 3mol / L ZnCl to the mixed solution obtained in step (1) 2 The solution was stirred and activated for 24 hours, centrifuged (7 minutes at 3000 rpm), dried in an oven at 105°C for 24 hours, ground, and sieved with 200 mesh to obtain the activated mixture;

[0052] (3) pyrolyze the activated mixture at high temperature in nitrogen atmosphere, the pyrolysis temperature is 600°C, 700°C, 800°C and 900°C; the pyrolysis time is 3h;

[0053] (4): step (3) obtains the pyrolysis product to pickle alternately with hydrofluoric acid (the mass concentration of hydrofluoric acid is 20%) and hydrochloric acid (the mass concentration of hydrofluoric acid is 20%), repeats three times (hydrofluoric ac...

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Abstract

The invention belongs to the field of environment functional material, and discloses a sludge / cationic clay multidimensional carbon nanomaterial, and preparation and applications thereof. A preparation method comprises following steps: 1, residual sludge and cationic clay are mixed to be uniform via stirring, an activating agent is added, stirring activation is carried out, and an activated mixture is obtained via centrifugation, drying, grinding, and sieving; 2, in an inert atmosphere or under vacuum conditions, the activated mixture is subjected to high-temperature pyrolysis so as to obtain a pyrolysis product; and 3, the pyrolysis product is subjected to acid pickling, suction filtration, and freeze drying so as to obtain the sludge / cationic clay multidimensional carbon nanomaterial. The sludge / cationic clay multidimensional carbon nanomaterial possesses a well-developed porous structure similar to that of graphene, is a novel sludge-based multidimensional carbon nanomaterial, possesses excellent electrochemical performance, and can be taken as a supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, and relates to a sludge / cation clay multidimensional carbon nanomaterial prepared based on a template method, in particular to a sludge / cation clay multidimensional carbon nanomaterial and its preparation method and application. Nanomaterials are used in supercapacitor electrode materials. Background technique [0002] With the development of the economy and the rapid increase of the population, the number of sewage treatment plants is also increasing. In the process of sewage treatment, a large amount of residual sludge is produced, accounting for about 0.3% to 0.5% of the treated water. Improper sludge treatment methods not only cause secondary pollution to the environment, but also waste useful substances such as a large amount of organic matter and rich nitrogen and phosphorus nutrients in the remaining sludge. Aiming at environmental problems such as the existence of a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
Inventor 吴平霄陈梅青朱能武
Owner SOUTH CHINA UNIV OF TECH