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Preparation method and application of nitrogen-sulfur co-doped three-dimensional porous carbon material

A nitrogen-sulfur co-doping, three-dimensional porous technology is applied in the fields of photosensitive devices, semiconductor/solid-state device manufacturing, electrolytic capacitors, etc., to achieve good three-dimensional skeleton structure, increase yield and surface area, and simple methods.

Active Publication Date: 2021-11-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A simple and convenient method of synthesizing nitrogen-sulfur co-doped three-dimensional porous carbon materials with methionine, sodium carbonate, and thiourea by one-step pyrolysis method for the counter electrode of dye-sensitized solar cells has not been reported yet.

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  • Preparation method and application of nitrogen-sulfur co-doped three-dimensional porous carbon material
  • Preparation method and application of nitrogen-sulfur co-doped three-dimensional porous carbon material
  • Preparation method and application of nitrogen-sulfur co-doped three-dimensional porous carbon material

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Embodiment 1

[0040] A method for preparing a nitrogen-sulfur co-doped three-dimensional porous carbon material, the preparation method of which is as follows:

[0041] (1) Mix 1 g of methionine, 4 g of sodium carbonate and 0.25 g of thiourea powder evenly, and grind for 70 min with a mortar to obtain a mixed powder;

[0042](2) Put the mixed powder obtained in step (1) into a tube furnace, pass it into an argon atmosphere for protection, and pyrolyze it at 900° C. for 2 minutes to obtain a pyrolysis product;

[0043] (3) Put the pyrolysis product obtained in step (2) into a centrifuge, wash it with 1mol / L NaCl solution, wash it at a rotating speed of 10000r / min for 13min, and repeat it at least three times until the white particles of sodium carbonate in the product disappear , then wash with deionized water, repeat at least three times until the filtrate is neutral, then put the washed product in a planetary ball mill, ball mill for 7h at 320r / min, and finally put the product in a vacuum ...

Embodiment 2

[0051] A method for preparing a nitrogen-sulfur co-doped three-dimensional porous carbon material, the preparation method of which is as follows:

[0052] (1) Mix 1 g of methionine, 2 g of sodium carbonate and 0.25 g of thiourea powder evenly, and grind for 60 min with a mortar to obtain a mixed powder;

[0053] (2) Put the mixed powder obtained in step (1) into a tube furnace, pass it into an argon atmosphere for protection, and pyrolyze it at 900° C. for 4 minutes to obtain a pyrolysis product;

[0054] (3) Put the pyrolysis product obtained in step (2) into a centrifuge, wash it with 1mol / L NaCl solution first, wash it at a rotating speed of 10000r / min for 10min, and repeat it at least three times until the white particles of sodium carbonate in the product disappear , then wash with deionized water, repeat at least three times until the filtrate is neutral, then put the washed product in a planetary ball mill, ball mill for 6h at 320r / min, and finally put the product in a ...

Embodiment 3

[0060] A method for preparing a nitrogen-sulfur co-doped three-dimensional porous carbon material, the preparation method of which is as follows:

[0061] (1) Mix 1g of methionine, 6g of sodium carbonate and 0.25g of thiourea powder evenly, and grind for 80min with a mortar to obtain a mixed powder;

[0062] (2) Put the mixed powder obtained in step (1) into a tube furnace, pass it into an argon atmosphere for protection, and perform pyrolysis at 900° C. for 5 minutes to obtain a pyrolysis product;

[0063] (3) Put the pyrolysis product obtained in step (2) into a centrifuge, wash it with 1mol / L NaCl solution, wash it at a rotating speed of 10000r / min for 15min, and repeat it at least three times until the white particles of sodium carbonate in the product disappear , then wash with deionized water, repeat at least three times until the filtrate is neutral, then put the washed product in a planetary ball mill, ball mill for 8h at 320r / min, and finally put the product in a vacu...

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Abstract

The invention discloses a preparation method of nitrogen-sulfur co-doped three-dimensional porous carbon. The v comprises the following steps of firstly, uniformly mixing methionine, sodium carbonate and thiourea powder according to a certain proportion, grinding the mixed powder, then transferring a proper amount of mixture into a porcelain boat, putting the porcelain boat into a tubular furnace, carrying out high-temperature pyrolysis, then washing the obtained pyrolysis product with a sodium chloride solution, washing the product with deionized water, fully grinding the product with a planetary ball mill, and finally drying the product in vacuum to obtain the nitrogen-sulfur co-doped three-dimensional porous carbon material. When the material is used for preparing a counter electrode of a dye-sensitized solar cell, the photoelectric conversion efficiency of the obtained DSSCs is improved, and the thermal stability of the cell is further remarkably improved. The method provided by the invention is simple and relatively low in cost, the DSSCs can be prepared by a one-step pyrolysis method, and the prepared DSSCs are excellent in performance and have a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of counter electrode preparation of dye-sensitized solar cells (DSSCs), and in particular relates to a preparation method and application of a nitrogen-sulfur co-doped three-dimensional porous carbon material. Background technique [0002] Energy and the environment are major challenges facing people today. Due to limited fossil energy resources such as oil, coal, and natural gas, and their use has caused increasingly serious energy crises and greenhouse effects, it is imperative to develop renewable new energy . Among them, solar energy has become the research focus of researchers due to its advantages such as abundant resources and unique development potential. It is estimated that the sun can transmit 8×10 radiant energy to the earth per second. 13 kW, equivalent to 1.892×10 16 The combustion heat of t coal, so the rational opening and utilization of solar energy is of great significance for today's ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20H01L51/44
CPCH01G9/042H01G9/2022H10K30/81Y02E10/549Y02E10/542
Inventor 贾素萍成彤王昊
Owner ZHONGBEI UNIV