Method for preparing sulfur-oxygen co-doped porous carbon based on paper

A technology of co-doping and porous carbon, applied in chemical instruments and methods, carbon compounds, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of high operational risk, low S doping amount, unstable structure, etc. Achieve high operability, low reaction temperature, and reduce the loss of sulfur element

Pending Publication Date: 2020-03-24
NINGXIA UNIVERSITY
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Problems solved by technology

The commonly used S source for sulfur doping is H 2 S, but there are problems such as low S doping amount, and the structure of the doped S element in the carbon skeleton is unstable and easy to fall off, and H 2 S gas is a toxic and flammable gas, and the operation is dangerous

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  • Method for preparing sulfur-oxygen co-doped porous carbon based on paper
  • Method for preparing sulfur-oxygen co-doped porous carbon based on paper
  • Method for preparing sulfur-oxygen co-doped porous carbon based on paper

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Embodiment Construction

[0023] The present invention is specifically described below by the examples. It is necessary to point out that the following examples are only used to further illustrate the present invention, and cannot be interpreted as limiting the protection scope of the present invention. Without departing from the spirit and essence of the present invention All modifications or replacements made to the methods, steps or conditions of the present invention fall within the scope of the present invention.

[0024] The specific process for preparing S, O co-doped porous carbon materials is as follows: figure 1 As shown, the experimental part is mainly divided into two parts: hydrothermal synthesis and high temperature pyrolysis. The morphology and composition of the prepared materials were characterized by SEM, XPS and BET analysis. The capacitive performance of the material and the performance of the lithium-ion battery were tested. The following is the specific implementation process o...

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Abstract

The invention belongs to a method for preparing sulfur-oxygen co-doped porous carbon from paper, particularly waste paper. The sulfur doping content of a porous carbon material is regulated and controlled through hydrothermal synthesis of a sulfuric acid solution by utilizing hydrothermal synthesis and high-temperature pyrolysis technologies on the basis of inherent structural characteristics of the paper; and the S and O co-doped porous carbon material is prepared through KOH assisted pyrolysis. The sulfur element doping amount of the prepared porous carbon material can be regulated to 0.3 at%-4at%, and the material presents a reticular hierarchical pore structure. A symmetrical capacitor assembled by taking the material as an electrode has the specific capacitance retention rate of 96% after 10000 times of circulation, has good electric circulation stability, and is worthy of market popularization and application.

Description

technical field [0001] The invention belongs to the field of nanometer functional carbon materials, and relates to a paper utilization method, in particular to a method for recycling waste paper, and further relates to a porous carbon material co-doped with sulfur and oxygen. Background technique [0002] my country is both a big paper-making country and a big paper-consuming country. The utilization level of waste paper is very low, only 30%, which is far lower than the world average of 47.7%. Moreover, waste paper recycling technology is single, and it is mainly used for recycled paper. In the process of deinking-bleaching to form recycled paper, a large amount of harmful wastewater will be generated, causing environmental pollution, and the reuse cost is high. Paper recycling is one of the effective ways to solve the problems of environmental pollution, raw material shortage and energy shortage. Generally speaking, recycling 1 ton of waste paper is equivalent to saving 3 ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348H01G11/30H01G11/34H01G11/84H01M4/38H01M4/583H01M10/0525
CPCC01B32/324C01B32/348H01G11/34H01G11/30H01G11/84H01M4/583H01M4/38H01M10/0525Y02E60/10
Inventor 郝健王秀郭庆杰
Owner NINGXIA UNIVERSITY
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