Preparation method of nickel sulfide nanosheet array

A technology of nanosheet array and nickel sulfide, which is applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of raw material consumption and achieve the effects of simplified preparation process, good catalytic performance and low cost

Active Publication Date: 2018-12-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing nickel sulfide nanosheet arrays in view of the shortcomings of high pressure and high temperature and serious raw material consumption in the hydrothermal method and solvothermal method existing in the current technology.

Method used

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  • Preparation method of nickel sulfide nanosheet array
  • Preparation method of nickel sulfide nanosheet array
  • Preparation method of nickel sulfide nanosheet array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Drop-coating thiolamine solution on nickel foam

[0027] Dissolve ethylenediamine and ethanedithiol in a volume ratio of 4:1 to make a thiolamine solution, and apply 0.5mL of thiolamine solution to 1*1cm 2 on the surface of one side of the nickel foam;

[0028] (2) Preparation of nickel foam supported nickel sulfide

[0029] The nickel foam that had been drip-coated with the thiolamine solution in step (1) was allowed to stand at room temperature and pressure for 24 hours, then the sample was placed on a heating plate, and heated at 300°C for 60 s, and finally the foamed nickel-supported nickel sulfide nanosheet array was obtained (Ni 3 S 2 NFs / NFs). X-ray diffraction pattern ( figure 1 ) in (101), (110), (003), (202), (113), (300) corresponding to the standard card JCPDS No.44-1418 respectively, proved to be pure phase nickel sulfide, indicating that The invented method can be used to prepare phase-pure nickel sulfide (Ni 3 S 2 ); where the three strongest ...

Embodiment 2

[0031] The other steps are the same as in Example 1, except that the resting time under normal temperature and pressure is changed from 24h to 16h. As a result, an array of nickel sulfide nanosheets is also obtained, but the thickness of the nanosheets is about 120nm, and the size is about 1.5μm , and the gap spacing of the nanosheet array is about 300nm, the specific shape is as follows image 3 As shown in b; when the prepared sample is applied to electrocatalysis, its OER overpotential is 280mV, which is 50mV lower than the OER overpotential of the nickel sulfide nanosheet array prepared by the Tewodros Asefa research group using the hydrothermal method. The specific polarization curve of the sample is as Figure 4 shown by the green line.

Embodiment 3

[0033] The other steps are the same as in Example 1, except that the standing time under normal temperature and pressure is changed from 24h to 32h. As a result, an array of nickel sulfide nanosheets is also obtained, but the thickness of the nanosheets is about 150nm, and the size is about 1.3μm. , and the gap spacing of the nanosheet array is about 500nm, the specific shape is as follows image 3 As shown in c; when the prepared sample is applied to electrocatalysis, its OER overpotential is 300mV, which is 30mV lower than the OER overpotential of the nickel sulfide nanosheet array prepared by the Tewodros Asefa research group using the hydrothermal method. The specific polarization curve of the sample is as Figure 4 shown by the blue line.

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Abstract

A preparation method of a nickel sulfide nanosheet array is disclosed. The method comprises the following steps: dissolving ethene diamine and ethanedithiol according to the volume ratio of 4: 1 to obtain a hydrosulfamine solution, coating one side surface of 1*1 cm<-2> foamed nickel with 0.5 ml of the hydrosulfamine solution, and let the foamed nickel coated with the hydrosulfamine solution standat normal temperature and at normal pressure for 24 h; placing a sample on a heating plate and heating at 300 DEG C for 60 s so as to obtain the nickel sulfide nanosheet array. The coating amount is0.20-0.30 mL per square centimeter. By the adoption of a normal pressure liquid-phase sulfuration method for preparation of the nickel sulfide nanosheet array, the preparation technology of the nickelsulfide nanosheet array is greatly simplified, consumption of experimental materials is greatly lowered, and OER overpotential is 260 mV when electric current density is 20 mA/cm<2>.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing a nickel sulfide nanosheet array. Background technique [0002] With the development of the economy, people's demand for energy is also increasing. At the beginning of the 20th century and before, the main way for people to obtain energy was through traditional fossil energy, but fossil energy is a non-renewable energy, and its reserves are decreasing year by year, making the possibility of energy crises increasing day by day; and the burning of fossil fuels has caused a A series of environmental problems have led to environmental pollution and the aggravation of the greenhouse effect. In order to solve the energy crisis that mankind will face, seeking an efficient, pollution-free and abundant energy source has become an important research direction. In the 1970s, hydrogen was paid more and more attention as a new energy source. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/049B01J37/20
CPCB01J27/049B01J35/0033B01J37/20
Inventor 郝秋艳李士云刘辉任刚贾冬波
Owner HEBEI UNIV OF TECH
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