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Nitrogen and sulfur co-doped ordered mesoporous carbon material as well as preparation method and application thereof

A technology of nitrogen-sulfur co-doping and mesoporous carbon, which is applied in the field of electrochemical sensing of functional materials, can solve problems such as unfavorable large-scale preparation and application, limit application and development, and increase preparation cost, and achieve good conductivity , Improve the success rate and improve the sensitivity

Active Publication Date: 2018-08-28
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, compared with the ordered mesoporous carbon doped with a single element, the doping of two elements will cause a certain change in the crystal structure of the carbon material, which is conducive to the improvement of electrochemical performance. However, the doping of two elements has Sequenced mesoporous carbon often requires a variety of substances to provide corresponding element sources, the preparation process is relatively complicated, and the preparation cost is further increased, which is not conducive to large-scale preparation and application, limiting its application and development, and the orderly doping of dual elements Mesoporous carbon is mainly used to improve electrocatalytic performance, but its application range is small

Method used

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  • Nitrogen and sulfur co-doped ordered mesoporous carbon material as well as preparation method and application thereof
  • Nitrogen and sulfur co-doped ordered mesoporous carbon material as well as preparation method and application thereof
  • Nitrogen and sulfur co-doped ordered mesoporous carbon material as well as preparation method and application thereof

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Embodiment 1

[0043] A nitrogen-sulfur co-doped ordered mesoporous carbon material of the present invention, the nitrogen-sulfur co-doped ordered mesoporous carbon material mainly uses SBA-15 as a mesoporous molecular sieve template, and dithizone as a single carbon source and sulfur source and nitrogen source, using carbon tetrachloride as a solvent for polymerization to form a nitrogen-sulfur co-doped ordered mesoporous carbon polymer, pyrolyzing the obtained polymer at high temperature to carbonize the polymer, and then etching to remove the mesoporous molecular sieve SBA- 15. Obtain nitrogen and sulfur co-doped ordered mesoporous carbon materials.

[0044] A preparation method of the nitrogen-sulfur co-doped ordered mesoporous carbon material of this embodiment, comprising the following steps:

[0045] S1. Synthesis of mesoporous molecular sieve SBA-15: Dissolve 2g of block copolymer P123 in hydrochloric acid solution. The hydrochloric acid solution is obtained by mixing 60mL of 2mol / L ...

Embodiment 2

[0053] An electrochemical current signal detection of the nitrogen-sulfur co-doped ordered mesoporous carbon material of embodiment 1, comprising the following steps:

[0054] (1) With a glassy carbon electrode as a working electrode, a saturated calomel electrode as a reference electrode, and a platinum wire electrode as a counter electrode, the aforementioned three electrodes are connected to an electrochemical workstation to establish a three-electrode system;

[0055] (2) The nitrogen-sulfur co-doped ordered mesoporous carbon material was dispersed in Nafion and drop-coated on the surface of the glassy carbon electrode, and then the bare electrode and the glass The carbon electrode was scanned by cyclic voltammetry.

[0056] Figure 4 It is the electrochemical current signal detection diagram of the nitrogen-sulfur co-doped ordered mesoporous carbon material in this example, from Figure 4 It can be seen that the peak current of the glassy carbon electrode coated with ni...

Embodiment 3

[0058] An electrochemical impedance signal detection of the nitrogen-sulfur co-doped ordered mesoporous carbon material of embodiment 1, comprising the following steps:

[0059] (1) With a glassy carbon electrode as a working electrode, a saturated calomel electrode as a reference electrode, and a platinum wire electrode as a counter electrode, the aforementioned three electrodes are connected to an electrochemical workstation to establish a three-electrode system;

[0060] (2) Disperse nitrogen-sulfur co-doped ordered mesoporous carbon in Nafion and drop-coat the surface of the glassy carbon electrode, and then drop-coat the bare electrode and the glassy carbon electrode with nitrogen-sulfur co-doped ordered mesoporous carbon An electrochemical impedance spectroscopy scan was performed.

[0061] Figure 5 It is an electrochemical impedance signal detection diagram of the nitrogen-sulfur co-doped ordered mesoporous carbon material in this embodiment, the abscissa in the figur...

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Abstract

The invention discloses a nitrogen and sulfur co-doped ordered mesoporous carbon material as well as a preparation method and application thereof. According to the ordered mesoporous carbon material,SBA-15 is mainly used as a mesoporous molecular sieve template, dithizone is used as a single carbon source, a sulfur source and a nitrogen source and carbon tetrachloride is used as a solvent, and polymerization is carried out to form a nitrogen and sulfur co-doped ordered mesoporous carbon polymer; after the obtained polymer is subjected to high-temperature pyrolysis, a mesoporous molecular sieve SBA-15 is removed by etching, and then the nitrogen and sulfur co-doped ordered mesoporous carbon material is obtained. The preparation method comprises synthesis of the molecular sieve, preparationof the polymer and pyrolysis, and template removal. The nitrogen and sulfur co-doped ordered mesoporous carbon material disclosed by the invention has the advantages of high mechanical strength, uniform pore diameter, strong stability, good biocompatibility and excellent electrochemical detection performance and is an environment-friendly ordered mesoporous carbon material which can be widely applied; the preparation method has the advantages of simple technological flow, moderate reaction conditions, environment protection and the like and can be used for large-scale preparation.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensing of functional materials, relates to an element double-doped ordered mesoporous carbon material and a preparation method and application thereof, in particular to a nitrogen-sulfur co-doped ordered mesoporous carbon material and Its preparation method and electrochemical sensing application. Background technique [0002] Porous carbon refers to carbon materials with a certain pore structure. According to the definition of the International Union of Pure and Applied Chemistry, porous carbon materials can be divided into the following three categories according to the pore size: porous carbon materials with a pore size less than 2 nm are microporous carbon materials, and porous carbon materials larger than 50 nm are macroporous carbon materials. Porous carbon materials with a thickness of 2-50 nm are mesoporous carbon materials. Among them, mesoporous carbon can be divided into orde...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01B39/08G01N27/30
CPCC01B39/08C01P2002/80C01P2004/03C01P2006/12C01P2006/16G01N27/308
Inventor 陈亮柳诗语赖萃张辰李必胜黄芳龙秦蕾易欢
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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