Ferro-nickel phosphate/carbon nanotube composite material and preparation method and application thereof

A carbon nanotube composite and carbon nanotube technology, applied in the field of electrochemistry, can solve problems such as the agglomeration of nickel-iron phosphide nanoparticles, achieve good electrical conductivity, avoid accumulation, and solve the effects of severe agglomeration

Active Publication Date: 2019-03-08
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The three-dimensional space structure formed by the self-assembly and winding of carbon nanotubes and metal phosphides not only enhances its electrical conductivity but also improves its catalytic activity, and at the same time meets the requirements of electrical conductivity, activity, and stability of an ideal oxygen evolution catalyst. However, based on In the process of traditional preparation technology, nickel iron phosphide nanoparticles have serious agglomeration problems, and composite materials with the above structure have not been reported yet.

Method used

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  • Ferro-nickel phosphate/carbon nanotube composite material and preparation method and application thereof
  • Ferro-nickel phosphate/carbon nanotube composite material and preparation method and application thereof
  • Ferro-nickel phosphate/carbon nanotube composite material and preparation method and application thereof

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Embodiment 1

[0044] The nickel-iron phosphide / carbon nanotube composite material was synthesized according to the following steps, which was denoted as Ni-Fe-P / CNT (1).

[0045] The preparation process is as figure 1 shown, including the following steps:

[0046] (1) Pretreatment of carbon nanotubes: cleaning and removing residual impurities on the surface of carbon nanotubes, and generating a large number of defects and oxygen-containing surface functional groups on the surface of carbon nanotubes by acid treatment;

[0047] (2) Preparation of nickel-iron hydroxide / carbon nanotube composite precursor: ultrasonically disperse the carbon nanotubes pretreated in step (1) in nitrogen, nitrogen-dimethylformamide solution; add nickel salt and iron After salt and stirring, an oil bath is used to obtain a stable three-dimensional structure nickel-iron hydroxide / carbon nanotube composite precursor through three heating reactions;

[0048] (3) In-situ conversion preparation of nickel-iron phosphi...

Embodiment 2

[0055] The nickel-iron phosphide / carbon nanotube composite material was synthesized according to the following steps, which was denoted as Ni-Fe-P / CNT (2).

[0056] (1) The pretreatment of carbon nanotubes specifically includes: dissolving 50 mg of carbon nanotubes (CNTs) in 5 mL of acetone, stirring at room temperature for 4 hours, washing and drying. It was added in 150mL of 20% hydrogen peroxide / 5% nitric acid mixed solution (V 双氧水 :V 硝酸 =4:1), after 10 minutes, the temperature was raised to 50°C for 5 hours, washed and dried.

[0057] (2) The preparation of nickel-iron hydroxide / carbon nanotube composite precursor (Ni-Fe LDH / CNT) is as follows: add 10 mg of pretreated carbon nanotubes to 30 mL of nitrogen, nitrogen-dimethylformamide solution ( DMF), ultrasonically dispersed for 20min. Then add 1.92mL of 0.2M nickel nitrate solution and 0.96mL of 0.2M ferric nitrate solution into the above solution, stir and react at room temperature for 3min, use an oil bath, heat up to...

Embodiment 3

[0062] The nickel-iron phosphide / carbon nanotube composite material was synthesized according to the following steps, which is denoted as Ni-Fe-P / CNT (3).

[0063] (1) The pretreatment of carbon nanotubes specifically includes: dissolving 200 mg of carbon nanotubes (CNTs) in 10 mL of acetone, stirring at room temperature for 5 hours, washing and drying. It was added in 250mL of 30% hydrogen peroxide / 10% nitric acid mixed solution (V 双氧水 :V 硝酸 =4:1), after 30min, the temperature was raised to 70°C for 3h, washed and dried.

[0064] (2) The preparation of nickel-iron hydroxide / carbon nanotube composite precursor (Ni-Fe LDH / CNT) is as follows: add 20 mg of pretreated carbon nanotubes to 40 mL of nitrogen, nitrogen-dimethylformamide solution ( DMF), ultrasonically dispersed for 50min. Then add 4.8mL of 0.2M nickel nitrate solution and 0.96mL of 0.2M ferric nitrate solution into the above solution, stir and react at room temperature for 10min, use an oil bath, heat up to 100°C f...

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Abstract

The invention discloses a ferro-nickel phosphate/carbon nanotube composite material and a preparation method and application thereof. A structure unit of the ferro-nickel phosphate/carbon nanotube composite material takes porous three-dimensional carbon nanotubes as a net-shaped framework, and ferro-nickel phosphate nanoparticles are wound on the carbon nanotubes. The preparation method comprisesthe following steps: pretreatment of the carbon nanotubes, preparation of a ferro-nickel hydroxide/carbon nanotube precursor, and in-situ conversion reaction of the ferro-nickel phosphate/carbon nanotube composite material. By the prepared ferro-nickel phosphate/carbon nanotube composite material, the problem that in a traditional preparation technological process, ferro-nickel phosphate nanoparticle unit structures are severely agglomerated can be solved effectively, and a new method is provided for preparing an electrode material which has a completely exposed active site, and is high in catalytic activity, good in electrical conductivity, low in overpotential and high in stability.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and more specifically, the invention relates to a three-dimensional nickel-iron phosphide / carbon nanotube composite material and its preparation method and application. Background technique [0002] Energy is the material basis for human survival and development. In the past long years, people mainly relied on fossil energy. However, excessive abuse of non-renewable fossil energy has caused a huge economic crisis. At the same time, the environmental pollution caused by the burning of fossil resources has also made the ecological environment deteriorate sharply. The development and utilization of new clean energy has become an urgent need. In recent years, green secondary energy such as wind energy, solar energy, and tidal energy can effectively solve some energy problems, but most of them are affected by uncontrollable factors such as weather, terrain, and temperature. As a new type o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C25B1/04C25B11/06
CPCB01J27/1853B01J35/0033C25B1/04C25B11/04Y02E60/36
Inventor 蒋仲庆郝晓琼潘泓舟曹雨薇
Owner ZHEJIANG SCI-TECH UNIV
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