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Element-doped transition metal sulfide ultrathin sheet and preparation and application thereof

A transition metal and element doping technology, applied in the direction of hydrocarbon production from carbon oxides, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as difficulties

Active Publication Date: 2021-05-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But CO 2 Molecule is extremely stable, reducing CO 2 A huge energy barrier needs to be overcome to achieve efficient reduction of CO 2 very difficult

Method used

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  • Element-doped transition metal sulfide ultrathin sheet and preparation and application thereof
  • Element-doped transition metal sulfide ultrathin sheet and preparation and application thereof
  • Element-doped transition metal sulfide ultrathin sheet and preparation and application thereof

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preparation example Construction

[0040] The invention discloses a method for preparing an element-doped transition metal sulfide ultrathin sheet, which comprises the following steps:

[0041]S1. Disperse the salt, doping element and transition metal source in water or solvent for heating reaction, and obtain the precursor after drying;

[0042] S2. Using sulfur powder as a sulfur source, calcining the precursor in an inert atmosphere at 150-400° C. to obtain element-doped transition metal sulfide ultrathin flakes.

[0043] In the present invention, the mass ratio of the salt, doping element and transition metal source is 100-1000:1-500:100-1000; in some specific embodiments, the salt, doping element and transition metal The mass ratio of the source is 200-500:3-100:200-500; the mass ratio of the salt, doping element and transition metal source is preferably 100:200:400.

[0044] The above reaction is carried out in a solvent, which is well known to those skilled in the art, and the present invention is not p...

Embodiment 1

[0078] Add 100 parts of sodium sulfate, 1 part of nickel acetate tetrahydrate and 100 parts of cobalt acetate tetrahydrate to 20 parts of water, stir vigorously at room temperature, pre-cool the resulting reaction solution, put it into a freeze dryer, and freeze-dry it for 24 hours to obtain a precursor Powder: Take the obtained precursor powder in a tube furnace, put 100 parts of sulfur powder at the front end of the tube furnace, calcinate at 180-300 degrees Celsius for 1 hour in a high-purity argon atmosphere, take out the powder product after natural cooling, wash and centrifuge The sample is obtained, and the powder obtained by drying the sample in a vacuum oven at 60°C for 10 h is nickel-doped cobalt disulfide ultrathin flakes.

[0079] The compound prepared in Example 1 is carried out structural identification, the results are shown in Figure 3 ~ Figure 5 , image 3 The middle a curve is the X-ray diffraction (XRD diffraction) pattern of the nickel-doped cobalt disulf...

Embodiment 2

[0081] Add 1000 parts of sodium sulfate, 500 parts of nickel acetate tetrahydrate and 1000 parts of cobalt acetate tetrahydrate to 40 parts of water, stir vigorously at room temperature, pre-cool the resulting reaction solution, put it into a freeze dryer, and freeze-dry it for 24 hours to obtain a precursor Powder: Take the obtained precursor powder in a tube furnace, put 1000 parts of sulfur powder at the front end of the tube furnace, calcinate at 180-300 degrees Celsius for 1 hour in a high-purity argon atmosphere, take out the powder product after natural cooling, wash and centrifuge The sample is obtained, and the powder obtained by drying the sample in a vacuum oven at 60°C for 10 h is nickel-doped cobalt disulfide ultrathin flakes.

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Abstract

The invention discloses an element-doped transition metal sulfide ultrathin sheet and preparation and application thereof. The transition metal sulfide ultrathin sheet is prepared from salt, a doped element, a transition metal source and powdered sulfur through reaction. The preparation method comprises the following steps: S1, dispersing the salt, the doping element and the transition metal source in a solvent, heating for reaction, and drying to obtain a precursor sheet; and S2, using the powdered sulfur as a sulfur source, and calcining the precursor sheet in an inert atmosphere at the temperature of 150-400 DEG C to obtain the element-doped transition metal sulfide ultrathin sheet. The element-doped transition metal sulfide ultrathin sheet is used as a catalyst to be applied to a reaction for catalyzing reduction of carbon dioxide. The element-doped transition metal sulfide ultrathin sheet disclosed by the invention can simultaneously realize infrared light catalysis, full-spectrum photocatalysis and thermocatalytic carbon dioxide reduction, and can realize efficient reduction of CO2 to prepare carbon-based fuel, thereby simultaneously realizing emission reduction and resource utilization of CO2.

Description

technical field [0001] The invention relates to the field of carbon dioxide reduction, in particular to an element-doped transition metal sulfide ultrathin sheet and its preparation and application. Background technique [0002] With the development of society, human's demand for energy continues to increase. According to the statistics of the International Energy Agency, the global energy demand has reached 18 megawatts in 2013, about 80% of which come from traditional fossil energy such as coal and oil. The reserves of fossil fuels are not only limited, but their extensive use will also cause a series of problems such as climate change and environmental pollution. With carbon dioxide (CO 2 ) emissions as an example, due to the extensive use of fossil fuels, CO in the atmosphere 2 Concentrations have risen from a pre-industrial level of 280ppm to about 400ppm. At this rate, atmospheric CO 2 The concentration will reach 500ppm in the 22nd century, which will cause the g...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J27/045B01J35/00B01J35/02C01B3/04C07C1/02C07C9/04
CPCB01J27/043B01J27/045C07C1/02C01B3/04B01J35/39B01J35/00B01J35/30C07C9/04Y02E60/36
Inventor 徐嘉麒李瑞祥陈华
Owner SICHUAN UNIV
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