Preparation method, product and application of nitrogen-phosphorus co-doped porous carbon material

A porous carbon material, co-doping technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of device activator corrosion, product pollution, activator "consumption", etc., to avoid environmental pollution, preparation The method is simple and the effect of avoiding equipment corrosion

Inactive Publication Date: 2020-02-14
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most porous carbon preparation methods have some disadvantages, such as: a large consumption of "activator", the release of harmful products, the preparation process is complicated and difficult to achieve large-scale production, and the device is easily corroded by the activator at high temperature, resulting in product contamination. , limiting the preparation and practical application range of biomass-based carbon materials

Method used

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  • Preparation method, product and application of nitrogen-phosphorus co-doped porous carbon material
  • Preparation method, product and application of nitrogen-phosphorus co-doped porous carbon material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] A nitrogen-phosphorus co-doped porous carbon material, using phytic acid and filamentous biomass materials as raw materials, adopts a high-temperature sintering method to prepare a nitrogen-phosphorus co-doped porous carbon material, which is prepared according to the following steps:

[0018] Mix silkworm cocoons and phytic acid in an aqueous solution at a mass ratio of 1:1.5, place them in an oven for drying, transfer the dried materials into a high-temperature tube furnace, and raise the temperature to 900°C at a rate of 5°C / min , and keep it warm for 2 hours. After cooling down to room temperature naturally, take out the sintered material, wash it with dilute nitric acid, and finally wash it with deionized water to obtain a nitrogen-phosphorus co-doped porous carbon material.

[0019] figure 1 is the cyclic voltammetry of the nitrogen-phosphorus co-doped porous carbon material obtained in this example. It can be concluded from the cyclic voltammetry that the capacit...

Embodiment 2

[0022] A nitrogen-phosphorus co-doped porous carbon material, prepared according to the following steps:

[0023] Mix wool fiber and phytic acid in an aqueous solution at a mass ratio of 1:0.5, place them in an oven to dry, and transfer the dried material to a high-temperature tube furnace, and raise the temperature to 900 °C at a rate of 10 °C / min. ℃, and keep it warm for 2 hours. After cooling down to room temperature naturally, the sintered material was taken out, washed with dilute nitric acid, and finally washed with deionized water to obtain a nitrogen-phosphorus co-doped porous carbon material.

Embodiment 3

[0025] A nitrogen-phosphorus co-doped porous carbon material, prepared according to the following steps:

[0026] Mix cotton and phytic acid in an aqueous solution at a mass ratio of 1:1, place them in an oven to dry, and transfer the dried material to a high-temperature tube furnace, and raise the temperature to 900°C at a rate of 10°C / min , and keep it warm for 2 hours. After cooling down to room temperature naturally, take out the sintered material, wash it with dilute nitric acid, and finally wash it with deionized water to obtain a nitrogen-phosphorus co-doped porous carbon material.

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Abstract

The invention relates to a preparation method, a product and application of a nitrogen-phosphorus co-doped porous carbon material. The nitrogen-phosphorus co-doped porous carbon material is prepared by taking phytic acid and a filamentous biomass material as raw materials and adopting a high-temperature sintering method. The preparation method specifically comprises the following steps: uniformlymixing the filamentous biomass and phytic acid according to a certain ratio; putting the raw materials into a blast oven for drying, transferring the dried materials into a tubular furnace, heating to900 DEG C in an inert gas atmosphere at a heating rate of 5-10 DEG C / min, keeping the temperature for 2 hours, naturally cooling to room temperature, taking an obtained product out, cleaning with dilute nitric acid, and finally cleaning with deionized water to obtain the nitrogen-phosphorus co-doped porous carbon material. Phytic acid is used as an activating agent and an additive, so that environmental pollution is avoided, and the preparation method is simple and does not corrode equipment.

Description

technical field [0001] The present invention relates to a supercapacitor electrode material, in particular to a porous carbon material, in particular to a preparation method of a nitrogen-phosphorous co-doped porous carbon material and its product and application. [0002] technical background [0003] In recent years, supercapacitors (Super Capacitor, SC) have been widely concerned by researchers due to their advantages such as long cycle life, large capacity, and strong environmental adaptability. A supercapacitor is mainly composed of the following parts: electrode material, current collector, diaphragm, electrolyte, etc. Among them, it is generally believed that the type of electrode material and electrolyte is the main factor affecting the energy storage effect of a supercapacitor. Therefore, the preparation and performance of new electrode materials has become one of the current research hotspots. Carbon materials have been used as supercapacitor electrode materials fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342C01B32/318C01B32/378H01G11/30H01G11/34H01G11/38
CPCC01B32/318C01B32/342C01B32/378H01G11/30H01G11/34H01G11/38Y02E60/13
Inventor 崔大祥王亚坤张芳张道明卢玉英阳靖峰焦靖华张放为
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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