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Synthesis method of nickel-doped iron disulfide nanowire array structure on titanium sheet substrate

A technology of nanowire array and iron disulfide, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of insufficient conductivity, poor stability of hydrogen production, cumbersome preparation methods, etc., and achieve good application prospects, The gas phase reaction is simple and the synthesis method is simple and easy to implement

Active Publication Date: 2018-07-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current doped metal sulfides are limited in application due to the cumbersome preparation methods, poor electrical conductivity, and poor hydrogen production stability in acidic electrolytes.

Method used

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  • Synthesis method of nickel-doped iron disulfide nanowire array structure on titanium sheet substrate
  • Synthesis method of nickel-doped iron disulfide nanowire array structure on titanium sheet substrate
  • Synthesis method of nickel-doped iron disulfide nanowire array structure on titanium sheet substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Synthesis of In Situ FeOOH Nanowire Arrays Grown on Titanium Sheet Substrates

[0024] Dissolve ferric chloride hexahydrate and sodium sulfate in deionized water to obtain a reaction solution, the concentration of iron salt in the reaction solution is 25mM, the concentration of sodium sulfate is 50mM, and transfer to the reaction kettle, put into the reaction system and undergo ultrasonic treatment The cleaned bare titanium sheet was cleaned, sealed in the kettle, and placed at 120°C for 12 hours to react. After the reaction, the titanium sheet was taken out, rinsed with ethanol and deionized water in sequence, and dried at 80° C. to obtain FeOOH nanowire arrays grown in situ. The samples obtained were figure 1 As shown in (a), the scanning electron microscope shows that FeOOH is a nanowire array structure uniformly grown on the titanium substrate, and the diameter of a single nanowire is about 50-80nm.

Embodiment 2

[0026] Synthesis of Ni-FeOOH Nanowire Arrays Grown in Situ on Titanium Sheet Substrate

[0027] Ferric chloride hexahydrate, nickel dichloride hexahydrate, sodium sulfate and urea were dissolved in deionized water to obtain a reaction solution, the concentration of iron salt in the reaction solution was 25mM, the concentration of nickel salt was 25mM, and the concentration of sodium sulfate was 50mM , the concentration of urea was 50mM, and it was transferred into a reaction kettle, and a clean bare titanium sheet that had been ultrasonically treated was put into the reaction system, sealed in the kettle, and placed at 120° C. for 12 hours to react. After the reaction, the titanium sheet was taken out, rinsed with ethanol and deionized water in sequence, and dried at 80°C to obtain an in-situ grown Ni-FeOOH nanowire array. The samples obtained were figure 1 As shown in (b), the scanning electron microscope shows that Ni-FeOOH grows uniformly on the titanium substrate, and has...

Embodiment 3

[0029] FeS on Ti substrate 2 Synthesis of nanowire array structures

[0030]Dissolve ferric chloride hexahydrate and sodium sulfate in deionized water to obtain a reaction solution, the concentration of iron salt in the reaction solution is 25mM, the concentration of sodium sulfate is 50mM, and transfer to the reaction kettle, put into the reaction system and undergo ultrasonic treatment The cleaned bare titanium sheet was cleaned, sealed in the kettle, and placed at 120°C for 12 hours to react. After the reaction, the titanium sheet was taken out, rinsed with ethanol and deionized water in sequence, and dried at 80° C. to obtain FeOOH nanowire arrays grown in situ. Then the obtained FeOOH / Ti was cut into 2cm 2 , placed in a tube furnace, and 2g of sulfur powder was weighed and placed at the gas source port of the tube furnace, and the tube furnace was repeatedly flushed with argon to exhaust the air. Under the protection of an argon atmosphere with a flow rate of 25 sccm, 4...

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Abstract

The invention relates to a synthesis method of nickel-doped iron disulfide nanowire array structure on a titanium sheet substrate. The synthesis method comprises the following steps: preparing a mixedaqueous solution containing iron salt, nickel salt, sodium sulfate and urea, feeding a clean titanium sheet, and performing hydrothermal reaction to obtain a nickel-doped iron oxide hydroxide nanowire array growing on the surface of the titanium sheet substrate in situ; placing a precursor into a tubular furnace for high-temperature gas phase vulcanization, and performing atmosphere protection byusing argon, thus obtaining the nickel-doped iron disulfide nanowire array assembled on the titanium sheet substrate. The method is easy and convenient to operate and high in repeatability; an obtained product is stable in structure, can be uniformly and firmly distributed on the surface of the titanium sheet, and can be directly used as a two-dimensional electrode material applied into electrochemical equipment; in addition, electrolytic water tests show that doping of nickel substantially improves the electrocatalytic hydrogen production activity and the stability of iron disulfide and is expected to further promote improvement of the performance of the nickel-doped iron disulfide nanowire array structure in the field such as energy storage and photocatalysis, and the application rangeof the nickel-doped iron disulfide nanowire array structure is expanded.

Description

technical field [0001] The invention relates to a method for synthesizing a doped transition metal sulfide, in particular to a method for synthesizing a nickel-doped iron disulfide nanowire array structure on a titanium substrate. Background technique [0002] At present, with the development of society, the demand for energy in various industries is also increasing. Therefore, the design and development of high-performance, low-cost, and high-efficiency nano energy materials have become the focus of scientific workers. Especially in the field of electrocatalysis and electrochemical energy storage, the performance limitations of nano-electrode materials have yet to be resolved. Sulfur element in metal sulfide, its outermost electronic structure is 3S 2 3P 4 , the energy levels of the empty 3d orbitals are close to those of the 3s and 3p orbitals, so the d orbitals have a variety of bonding methods under certain conditions, which makes the structure of metal sulfides divers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/0525B82Y30/00B01J27/043
CPCH01M4/5815H01M10/0525B82Y30/00B01J27/043B01J35/33Y02E60/10
Inventor 杨金虎刘光磊冯楠孟瑞晋祖连海冯宇通
Owner TONGJI UNIV
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