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Preparation method of nickel sulfide, nickel octasulfide and composite phase of nickel sulfide and nickel octasulfide

A technology of nickel sulfide and composite phase, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low photocatalytic efficiency, and achieve a simple preparation method, easy operation, and low price Effect

Pending Publication Date: 2022-03-08
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current process is limited by the bottleneck problem of low photocatalytic efficiency, and there is still a long way to go before industrial application

Method used

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  • Preparation method of nickel sulfide, nickel octasulfide and composite phase of nickel sulfide and nickel octasulfide
  • Preparation method of nickel sulfide, nickel octasulfide and composite phase of nickel sulfide and nickel octasulfide
  • Preparation method of nickel sulfide, nickel octasulfide and composite phase of nickel sulfide and nickel octasulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) 0.29 g (1 mmol), thiourea (CH 4 N 2 S) 0.30 g (4 mmol) and sodium hypophosphite (NaH 2 PO 2 ·H 2O) Add 0.53 g (5 mmol) into 30 mL of deionized water (that is, add nickel nitrate, thiourea, and sodium hypophosphite at a molar ratio of 1:4:5), and stir on a magnetic stirrer at 500 rpm Stir at high speed for 20 min. The above solution is transferred to the reaction kettle and sealed, put into a blast drying oven at 180 o C under hydrothermal reaction for 4 h. After the reaction was completed, the precipitate in the reactor was taken out, cleaned with deionized water, and cleaned in a blast drying oven for 60 o C drying, to obtain a pure phase nickel sulfide (NiS) material.

[0042] like figure 1 The curve in (a) shows that the obtained NiS belongs to the rhombohedral system.

[0043] like Figure 4 As shown in (a), the obtained NiS is an aggregate of nanoparticles, and the diameter of the nanoparticles is between 100-...

Embodiment 2

[0047] The difference between embodiment 2 and embodiment 1 is that sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 0.64 g (6 mmol), so that the molar ratio of nickel nitrate, thiourea, and sodium hypophosphite is 1: 4: 6. A pure phase nickel sulfide (NiS) material is obtained.

[0048] like figure 1 The curve in (b) shows that the obtained NiS belongs to the rhombohedral system like the sample obtained in Example 1.

Embodiment 3

[0050] The difference between embodiment 3 and embodiment 1 is that sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 1.06 g (10 mmol), so that the molar ratio of nickel nitrate, thiourea, and sodium hypophosphite is 1: 4: 10. The obtained sample is a composite phase nickel sulfide / nine nickel sulfide (NiS / Ni 9 S 8 ).

[0051] like figure 2 The curve in (a) shows that the obtained NiS belongs to the rhombohedral system like the sample obtained in Example 1, and the obtained NiS 9 S 8 It belongs to the orthorhombic crystal system.

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Abstract

The invention discloses a preparation method of a composite phase of nickel sulfide and nickel octasulfide, and relates to a preparation method of a catalyst, which comprises the following steps: sequentially weighing a certain amount of nickel nitrate, thiourea and sodium hypophosphite according to a molar ratio, and dissolving in deionized water; putting the obtained solution into a reaction kettle, sealing the reaction kettle, and putting the sealed reaction kettle into an air dry oven for heating treatment; after the hydrothermal reaction is completed, opening the reaction kettle, taking out a sample, cleaning with deionized water, and drying; when the molar ratio of nickel nitrate to thiourea to sodium hypophosphite is 1: (2-6): (5-10), obtaining a pure-phase nickel sulfide sample; when the molar ratio of nickel nitrate to thiourea to sodium hypophosphite is 1: (2-6): (11-15), obtaining a composite phase nickel sulfide / nickelous octasulfide sample, and adjusting the composition ratio of nickel sulfide to nickelous octasulfide; when the molar ratio of nickel nitrate to thiourea to sodium hypophosphite is 1: (2-6): (16-20), obtaining a pure-phase nickelous octasulfide sample. The used raw materials are low in price, the preparation method is simple and easy to operate, and the obtained nickel sulfide / ninth nickel octasulfide can be used as an electrochemical hydrogen evolution material and a cocatalyst material for hydrogen production by photocatalytic decomposition of water.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a composite phase of nickel sulfide and nickel octasulfide and nickel octasulfide. Background technique [0002] The traditional fossil energy is gradually depleted and the environmental problems caused by its consumption are increasing. Therefore, it is imperative to find a sustainable, efficient and clean new energy. Hydrogen has many advantages such as non-polluting combustion, renewable and high combustion heat, and can be regarded as an ideal energy carrier to replace traditional fossil fuels. [0003] Electrocatalytic water splitting hydrogen production technology uses electricity generated by renewable energy to drive water splitting to produce hydrogen and oxygen. This process produces no other products, and the hydrogen produced is of high purity, and the device is simple and easy to operate. It is an ideal hydrogen production technology. . Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043
CPCB01J27/043B01J35/39B01J35/33
Inventor 谢英鹏常俊华姜仁政孙艺伊鲁东
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY