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Preparation method and application of porous carbon dot material based on industrial glucose

A technology of porous carbon and glucose, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of complex preparation process and achieve the effects of simple production process, high yield and broad application prospects

Pending Publication Date: 2021-06-04
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this program is to provide a preparation method and application of porous carbon dot materials based on industrial glucose to solve the problem of complex preparation process

Method used

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  • Preparation method and application of porous carbon dot material based on industrial glucose
  • Preparation method and application of porous carbon dot material based on industrial glucose
  • Preparation method and application of porous carbon dot material based on industrial glucose

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Experimental program
Comparison scheme
Effect test

Embodiment

[0032] A kind of preparation method of the porous carbon dot material based on industrial glucose, comprises the following steps:

[0033] Step 1: Directly heat industrial glucose to synthesize the precursor of porous carbon dot material, the synthesis temperature is S°C, and the time is Tmin;

[0034] Step 2: Mix the precursor prepared in step 1 with KOH at a mass ratio of X;

[0035] Step 3: Heat the material obtained in Step 2 under an argon atmosphere to activate and carbonize it. The heating rate is V°C / min, and the temperature is raised to S 1 It was kept at ℃ for 2 hours, and finally cooled to room temperature to obtain a crude product, which was further washed with 0.3% dilute hydrochloric acid solution and water to neutrality, and dried to obtain a porous carbon dot material.

[0036]

[0037] Table 1

[0038] As shown in Table 1:

Embodiment 1

[0051] For Example 1, under the three-electrode system, the electrode sheet is used as the working electrode, the Pt sheet is used as the counter electrode, and the Hg / HgO electrode is used as the reference electrode to form a three-electrode system, using a CHI760E electrochemical workstation (CHI Instrument Company) in 3M KOH , carry out electrochemical tests at different scan speeds of 10-200mV / s, and obtain CV curves, the results are as follows Figure 4 shown. Then carry out the electrochemical test under the condition of 1 ~ 20A / g constant current charge and discharge, obtain the constant current charge and discharge curve, the results are as follows Figure 5 shown.

[0052] For Example 1, under the two-electrode system, 3 M KOH solution was used as the electrolyte, and nickel foam with a difference in the loading mass of the active material of less than 0.3 mg was used as the positive and negative electrodes respectively, and they were separated by a water-based diaph...

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Abstract

The invention discloses a preparation method and application of a porous carbon dot material based on industrial glucose. The preparation method comprises the following steps: step 1, taking industrial glucose as a carbon source, and directly heating the carbon source in an air environment at the heating temperature of 180-250 DEG C for 5-20 minutes to prepare a porous carbon dot material precursor; 2, uniformly mixing the porous carbon dot material precursor obtained in the step 1 with potassium hydroxide according to a mass ratio of 1: 0.25-1: 1; 3, activating and carbonizing a product obtained in the step 2 in an inert environment, and keeping the temperature for 1-3 hours to obtain a porous carbon dot material; the temperature rising speed is 2-5 DEG C / min, and the temperature rises to 500-900 DEG C; potassium hydroxide is adopted as an activating agent, the prepared porous carbon dot material has a large number of rich pore structures, the specific surface area and porosity are improved, and the hydrophilicity of the porous carbon dot material can be improved. The porous carbon dot material has excellent electrochemical performance, and has wide application prospects in capacitor energy storage devices and electrode materials.

Description

technical field [0001] The proposal belongs to the field of energy storage materials, and specifically relates to a preparation method and application of a porous carbon dot material based on industrial glucose. Background technique [0002] Energy crisis and environmental pollution are two major problems plaguing the world at present. The development and utilization of abundant, renewable and clean new energy is an effective measure to solve these two problems, which has attracted the attention of all countries in the world. However, new energy sources such as solar energy and wind energy have the characteristics of intermittent supply and large fluctuations, which are not conducive to continuous energy supply. Therefore, efficient energy storage and conversion devices are the key to new energy utilization. Supercapacitors have the characteristics of high power density, rapid charge and discharge, long cycle life, and high safety, and are one of the most potential energy s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/318H01G11/34H01G11/44
CPCC01B32/348C01B32/318H01G11/34H01G11/44
Inventor 陈久存蒲建林金燕子
Owner SOUTHWEST UNIV
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