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High-specific-surface-area carbon material based on waste tobacco stems, and preparation method and application thereof

A high specific surface area, carbon material technology, applied in chemical instruments and methods, carbon compounds, other chemical processes, etc., can solve the problems of less research, achieve the effects of rich sources, improved wettability, and reduced production costs

Inactive Publication Date: 2020-05-08
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, scientific researchers and the industry have conducted detailed research on various biomass wastes such as coconut shells, bamboo poles, and wood chips, but there are still relatively few studies on tobacco straw as raw materials for preparing adsorption materials and electrode materials for energy storage devices.

Method used

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  • High-specific-surface-area carbon material based on waste tobacco stems, and preparation method and application thereof
  • High-specific-surface-area carbon material based on waste tobacco stems, and preparation method and application thereof
  • High-specific-surface-area carbon material based on waste tobacco stems, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a high specific surface area carbon material based on waste tobacco rods, comprising the steps of:

[0042] (1) Raw material pretreatment

[0043]Wash the soil on the tobacco stalks with clean water, remove the roots of the tobacco stalks and the remaining tobacco leaves and dry them naturally, then cut off the outer skin and cut them into pieces, send them into the crusher, and crush them into 50-200 mesh tobacco stalk powder, and put them in the oven Insulate at 70°C for 24 hours and dry for later use.

[0044] (2) Preparation of carbonized material

[0045] Pre-pyrolyze the tobacco rod powder obtained in step (1) in a tube furnace, raise the temperature to 550°C at a rate of 5°C / min in a nitrogen atmosphere (flow rate: 3mL / min), keep it warm for 2 hours, and drop to Take it out after room temperature to obtain carbonized material.

[0046] (3) Preparation of activation material

[0047] Grind and mix the carbonized material obtained in step...

Embodiment 2

[0051] Example 2: Only change the ratio of carbonized material to KOH in step (3) of Example 1 to 1:4, and refer to Example 1 for the remaining parameters and steps.

[0052] Figure 5 It is the topography figure of the carbon material obtained in Example 2, wherein (a) is an SEM figure, and (b) is a transmission electron microscope figure; Figure 6 It is the carbon material isothermal nitrogen adsorption-desorption curve obtained in Example 2; Figure 7 It is the pore size distribution diagram of the carbon material obtained in Example 2.

Embodiment 3

[0053] Embodiment 3: Only change the activation temperature of step (3) of the embodiment to 700° C., and refer to embodiment 1 for the remaining parameters and steps.

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Abstract

The invention belongs to the technical field of carbon materials, and discloses a high-specific-surface-area carbon material based on waste tobacco stems, and a preparation method and an application thereof. The preparation method comprises the following steps: pretreating, carbonizing and activating tobacco stems to obtain tobacco stem activated carbon, namely the high-specific-surface-area carbon material, wherein an activator used in the activation is KOH. The high-specific-surface-area carbon material is applied to an electrode material and sewage treatment. The electrode material is prepared by the following steps: uniformly mixing tobacco stem activated carbon and thiourea in water, and drying to obtain a mixture; and carrying out heat preservation on the mixture in a protective atmosphere at 700-900 DEG C for 1-3 h, and carrying out subsequent treatment. The tobacco stem biological waste is utilized, so that the consumption of the activator is reduced, and the carbon material with excellent performances can be obtained. The carbon material is high in specific surface area and high in removal rate of pollutants in sewage; and the obtained electrode material has high conductivity and high capacitance.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a high specific surface area carbon material for waste tobacco rods, a preparation method and application thereof. Background technique [0002] Electric double-layer capacitors (EDLCs) are widely used as auxiliary power sources for hybrid electric vehicles or fuel cell electric vehicles due to their high energy density and power density. Among them, activated carbon with high specific surface area has become the most widely used electrode material for EDLC because of its large specific surface area and good conductivity. In addition, activated carbon also has excellent properties such as high adsorption capacity and fast adsorption speed, and can be widely used in air purification, Sewage purification, toxic substance adsorption and blood purification and other fields. [0003] At present, one of the main reasons restricting the wide application of EDLC is ...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324C01B32/354H01G11/24H01G11/34H01G11/44B01J20/20C02F1/28C02F101/30
CPCB01J20/20C02F1/283C02F2101/308C01B32/324C01B32/348C01B32/354H01G11/24H01G11/34H01G11/44
Inventor 林志丹黄素媛方泽铭曹琳张鹏廖小杰谢亦斌
Owner JINAN UNIVERSITY
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