Preparation method and application for bombax ceiba peel-based porous biomass carbon material

A technology of biomass charcoal and fruit peel, which is applied in the direction of carbon preparation/purification, hybrid capacitor electrodes, etc., can solve the problems of no electrode material found, less adsorption performance, etc., and achieve suitable for large-scale production, green and environmentally friendly price, simple and easy process line effect

Inactive Publication Date: 2018-05-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there are very few studies on kapok peel-based porous biochar materials and are limited to the study of its adsorption properties, and no research has been found on kapok peel-based porous biochar materials as electrode materials.

Method used

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  • Preparation method and application for bombax ceiba peel-based porous biomass carbon material
  • Preparation method and application for bombax ceiba peel-based porous biomass carbon material
  • Preparation method and application for bombax ceiba peel-based porous biomass carbon material

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Embodiment 1

[0029] (1) Put 2 g of pretreated kapok peel powder into a 20 mL crucible, place it in a resistance furnace, and heat it at 5 °C min -1 The temperature was raised at a rate of 300 °C, and anaerobic pyrolysis was carried out at this temperature. After the holding time was 2 hours, it was cooled to room temperature, and the product was dissolved in 1 mol L -1 Soak in hydrochloric acid for 0.5 hour, wash to neutrality, dry and grind to obtain pre-carbonized product.

[0030] (2) Put 2 g of the pre-carbonized product into a 20 mL graphite crucible, place it in a resistance furnace, and heat it at 5 °C min -1 The temperature was raised to 700 °C at a certain rate, and carbonized at this temperature under the protection of nitrogen. The holding time was 2 hours. -1 Soak in hydrochloric acid for 0.5 hours, wash to neutrality, and dry to constant weight to obtain a kapok peel-based porous biochar material. Its SEM picture is as figure 1 As shown, it can be seen from the picture that...

Embodiment 2

[0032] (1) Put 2 g of pretreated kapok peel powder into a 20 mL crucible, place it in a resistance furnace, and heat it at 4 °C min -1 The temperature was raised at a rate of 500 °C, and anaerobic pyrolysis was carried out at this temperature. After the holding time was 1 hour, it was cooled to room temperature, and the product was dissolved in 1 mol L -1 Soak in hydrochloric acid for 0.5 hour, wash to neutrality, dry and grind to obtain pre-carbonized product.

[0033] (2) Put 3 g of the pre-carbonized product into a 20 mL graphite crucible, place it in a resistance furnace, and heat it at 4 °C min -1 The temperature was raised to 900 ℃ at a certain rate, and carbonized at this temperature under the protection of nitrogen. The holding time was 1 hour. -1 Soak in hydrochloric acid for 0.5 hours, wash to neutrality, and dry to constant weight to obtain a kapok peel-based porous biochar material. Its SEM picture is as figure 2 As shown, it can be seen from the picture that t...

Embodiment 3

[0035] (1) Put 2 g of pretreated kapok peel powder into a 20 mL crucible, place it in a resistance furnace, and heat it at 8 °C min -1 The temperature was raised to 400 °C at a high rate, and anaerobic pyrolysis was carried out at this temperature. After the holding time was 0.5 hours, it was cooled to room temperature, and the product was dissolved in 1 mol L -1 Soak in hydrochloric acid for 0.5 hour, wash to neutrality, dry and grind to obtain pre-carbonized product.

[0036] (2) Put 3 g of the pre-carbonized product into a 20 mL graphite crucible, place it in a resistance furnace, and heat it at 4 °C min -1 The temperature was raised to 1000 °C at a rate of 1000 °C, and carbonized at this temperature under the protection of nitrogen. The holding time was 2 hours. After fully carbonized under normal pressure, it was cooled to room temperature with the furnace. -1 Soak in hydrochloric acid for 0.5 hours, wash to neutrality, and dry to constant weight to obtain a kapok peel-b...

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Abstract

The invention belongs to the technical field of preparation of porous carbon materials, and in particular relates to a preparation method and application for a bombax ceiba peel-based porous biomass carbon material. The method comprises the steps of firstly performing pretreatment on a bombax ceiba peel raw material, performing washing, performing drying, performing crushing, and performing normal-pressure pyrolysis to obtain a pre-carbonized product; secondly performing acid treatment on the pre-carbonized product; and finally performing normal-pressure heating carbonization on the dried pre-carbonized product under the protection of a nitrogen gas, performing cooling to room temperature, performing soaking by using hydrochloric acid, performing washing to neutrality, and performing drying to a constant weight, so as to obtain the bombax ceiba peel-based porous biomass carbon material. The prepared bombax ceiba peel-based porous biomass carbon material provided by the invention can beused for super capacitor electrode materials; and the preparation method has the advantages that the operation is simple and easy to control, the costs are low, pre-carbonization and carbonization can be performed on the basis of maintaining the original structure of the material, and the prepared porous biomass carbon has different pore structures and can be used as an excellent super capacitorelectrode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous carbon materials, and relates to a preparation method and application of kapok peel-based porous biomass carbon materials. Background technique [0002] Supercapacitors usually include four components: electrodes, electrolytes, current collectors, and separators. Among them, the electrode material is the key, which determines the main performance parameters of the capacitor. Commonly used electrode materials include carbon-based material electrodes, conductive polymer electrodes, and metal oxide electrodes. The current main problem of conductive polymers is that their cycle performance is unstable. During the long-term charging and discharging process, volume expansion or shrinkage will occur, resulting in a decline in the performance of conductive polymer materials. Among the metal oxide-based capacitors, the most successful research is mainly the aqueous system of ruthenium dioxi...

Claims

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Application Information

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IPC IPC(8): C01B32/05H01G11/34H01G11/44
CPCY02E60/13H01G11/34H01G11/44
Inventor 吕秋丰梁恕侠王钧锐马正威王书豪
Owner FUZHOU UNIV
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