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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
  • Description
  • 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 modified glassy carbon electrode, aiming to solve the defects of time-consuming and high cost in the current manufacturing method of porous carbon material

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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preparation example Construction

[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 flow, and carbonized by heating at a high temperature; then it is activated in an environment of a pore-forming agent, for example, after being mixed with magnesium oxide, it is heated at a high temperature, so that a material with a high specificity can be obtained. Porous carbon materials with developed surface area and pore structure. However, from the perspective of process flow, porous carbon materials are 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, aiming at solving the defects of time-consuming and high cost in the current methods for manufacturing porous carbon materials. figure 1 It is an embodiment of the preparation method of the porous carbon material p...

Embodiment 1

[0059] Put the chaff in a closed tube furnace, fill it with nitrogen as a protective gas, and then heat it in a closed tube at a rate of 4 °C / min to 1000 °C, and after carbonization for 2 hours, cool it down to room temperature at a rate of 4 °C / min , to obtain an activated carbon material (referred to as RH-1000). Soak the activated carbon material in 10% hydrochloric acid solution for 3 hours to deash initially, wash and dry to obtain the primary carbon material, then add the primary carbon material to 2mol / L sodium hydroxide solution, heat and reflux at 80°C for 2 hours , Porous carbon material (denoted as PC-1000) after washing and drying.

[0060] The microstructure of RH-1000 was observed by 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 conditions has an orderly and compact raised structure, and at the same time, obvious cracks appea...

Embodiment 2

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