Porous carbon material preparation method, carbon-selenium composite material, and modified glassy carbon electrode

A technology of porous carbon materials and carbon materials, applied in the direction of hybrid capacitor electrodes, carbon compounds, chemical instruments and methods, etc., can solve the problems of high cost and time-consuming, etc., to expand pores, reduce production costs, and shorten production time-consuming Effect

Inactive Publication Date: 2019-11-26
WUHAN POLYTECHNIC UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a preparation method of porous carbon material, carbon-selenium composite material and mo

Method used

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  • Porous carbon material preparation method, carbon-selenium composite material, and modified glassy carbon electrode
  • Porous carbon material preparation method, carbon-selenium composite material, and modified glassy carbon electrode
  • Porous carbon material preparation method, carbon-selenium composite material, and modified glassy carbon electrode

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Example Embodiment

[0040] The preparation of carbon materials usually requires two steps of high-temperature carbonization and activation. Specifically, the raw material is placed in an inert gas stream and carbonized by high-temperature heating; then it is activated in a pore former environment, for example, mixed with magnesium oxide and heated at a high temperature, so as to obtain a higher ratio Porous carbon material with developed surface area and pore structure. However, based on the perspective of the technological process, the porous carbon material is prepared in two steps, which undoubtedly increases the required cost and time.

[0041] In view of this, the present invention proposes a method for preparing porous carbon materials, which aims to solve the disadvantages of long time-consuming and high cost of the current methods for manufacturing porous carbon materials. figure 1 This is an embodiment of the method for preparing the porous carbon material proposed by the present invention....

Example Embodiment

[0058] Example 1

[0059] Place the chaff in a closed tube furnace, fill it with nitrogen as a protective gas, and then heat it in a closed manner, heating up to 1000°C at a heating rate of 4°C / min, and after carbonization for 2 hours, it will drop to room temperature at a rate of 4°C / min , Get activated carbon material (denoted as RH-1000). The activated carbon material is soaked in 10% hydrochloric acid solution for 3 hours for preliminary deashing. After washing and drying, the primary carbon material is obtained, and then the primary carbon material is added to the 2mol / L sodium hydroxide solution and heated to reflux at 80°C for 2 hours After washing and drying, a porous carbon material (denoted as PC-1000) is obtained.

[0060] Observe the microstructure of RH-1000 with an electron microscope, from figure 2 It can be seen that the surface of the activated carbon material after carbonization and activation treatment under airtight and nitrogen protection has an orderly and c...

Example Embodiment

[0063] Example 2

[0064] Except for the step of raising the temperature to 900°C at a heating rate of 4°C / min, the other steps are the same as in Example 1. Among them, in this embodiment, the obtained activated carbon material is referred to as RH-900, and the obtained porous carbon material is referred to as PC-900.

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Abstract

The invention discloses a porous carbon material preparation method, a carbon-selenium composite material, and a modified glassy carbon electrode, and belongs to the technical field of carbon material. The porous carbon material preparation method comprises following steps: under sealed nitrogen gas protection conditions, a plant fiber waste is heated until carbonization is realized so as to obtain an activated carbon material; the activated carbon material is immersed in an acidic solution for primary de-ashing, and washing and drying are carried out to obtain a primary carbon material; the primary carbon material is added into a sodium hydroxide solution, heating reflux is carried out until impurities are removed so as to obtain the porous carbon material. According to the preparation method, the plant fiber waste is subjected to high temperature carbonization at the sealed oxygen-free environment, so that water molecules generated in plant fiber waste high temperature pyrolysis aretaken as a pore forming agent needed in activation, carbonization and activation can be completed in one step, production time is shortened effectively, production cost is reduced, and problems such as long time and high cost in conventional porous carbon material manufacturing technology are solved.

Description

technical field [0001] The invention relates to the technical field of carbon materials, in particular to a preparation method of a porous carbon material, a carbon-selenium composite material and a modified glassy carbon electrode. Background technique [0002] Energy shortage, environmental pollution and waste of biomass resources have become the focus of attention of the whole society. With the rapid development of modern industry, the massive exploitation and use of non-renewable energy such as coal, oil, and natural gas has caused a serious energy crisis on the one hand, and has had a negative impact on the ecosystem on the other hand. In the research of recent years, as one of the most important electrochemical energy storage devices, supercapacitors provide a promising technology for the future energy crisis. High-performance electrode materials are the key to determining the capacitance of supercapacitors. Carbon-based materials have been widely used as electrode m...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/378H01G11/30H01G11/24H01G11/38H01G11/86
CPCC01B32/324C01B32/378H01G11/24H01G11/30H01G11/38H01G11/86Y02E60/13
Inventor 蔡杰
Owner WUHAN POLYTECHNIC UNIVERSITY
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