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Sulfur-doped graphene catalytic material and preparation method thereof

A technology of sulfur-doped graphene and catalytic materials, which is applied in catalyst activation/preparation, graphene, chemical instruments and methods, etc., can solve the problems of inability to effectively control sulfur doping, inability to distinguish catalytic activity and function, etc. The preparation method is simple and feasible, the photocatalysis is good, and the preparation raw materials are cheap and easy to obtain.

Active Publication Date: 2018-05-01
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the research on the doping of graphene with sulfur atoms, it is impossible to effectively control the single form of sulfur doping. The catalytic activity and function of doped sulfur cannot be distinguished

Method used

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  • Sulfur-doped graphene catalytic material and preparation method thereof
  • Sulfur-doped graphene catalytic material and preparation method thereof
  • Sulfur-doped graphene catalytic material and preparation method thereof

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Embodiment 1

[0025] The reaction design path of the present invention is as follows:

[0026]

[0027] In the design reaction process, sodium peroxodisulfate generates sulfate radicals after thermal activation, and the generated active groups then react with carboxylic acid groups on the surface of graphene to form graphite-type or pyridine-type doped carbon structures, and then carry out Decarboxylation forms a stable edge-loaded structure. In addition, the sulfur-doped structure can also react with other oxygen-containing functional groups to reduce graphite oxide, and connect to the edge of the graphene structure, widen the layer-to-layer gap of the graphene structure, and inhibit the π-π stacking of graphene , resulting in a smoother single-layer graphene structure. Specifically include the following steps:

[0028] (1) Weigh each raw material component: graphite powder 0.25~0.84wt%, sodium nitrate 0.30~0.55wt%, potassium permanganate 1.51~2.55wt%, concentrated sulfuric acid 14.22...

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Abstract

The invention discloses a sulfur-doped graphene catalytic material and a preparation method thereof. The material is prepared by a hydrothermal synthesis method from the following raw materials in percentage by mass: graphite powder 0.20-0.85wt%, sodium nitrate 0.30-0.60 wt%, potassium permanganate 1.50-2.60 wt%, concentrated sulfuric acid 14.00-18.50 wt%, persulfate 0.01-0.07 wt%, hydrogen peroxide 24.00-30.00 wt %, and the balance of water, wherein sulfur atoms are loaded in a single form of edge loading into a graphene structure composed of six-membered carbon rings. The material of the invention can meet multi-directional requirements of materials in terms of economic cost and mechanism research, and has broad prospects both in scientific research and in catalytic industry applications.

Description

technical field [0001] The invention belongs to the technical field of graphene catalysts, in particular to a sulfur-doped graphene catalyst material and a preparation method thereof. Background technique [0002] Since the successful preparation of graphene materials in 2004, it has become one of the main substrates of electrode materials because of its large specific surface area, high mechanical strength and flexibility, and strong electrical conductivity. The special structure of graphene material makes it have both the characteristics of metal materials (disappearing Fermi surface) and the characteristics of semiconductor materials (zero energy gap). At present, graphene-based catalytic materials have been used in photocatalysis, electrocatalysis, chemical catalysis and other fields. However, due to the non-innate performance band gap of graphene materials, it is easy to stack, which easily leads to defects such as agglomeration of loaded particles and edge loading. ...

Claims

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Application Information

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IPC IPC(8): C01B32/184B01J31/02B01J27/02B01J37/10B01J37/12
CPCB01J27/02B01J31/0215B01J37/10B01J37/12B01J35/33
Inventor 张倩洪俊明黄湾王炳煌
Owner HUAQIAO UNIVERSITY
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