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Preparation method of two-dimensional titanium carbide/carbon nanotube loaded platinum particle composite material

A technology of two-dimensional titanium carbide and carbon nanotubes is applied in the field of preparation of two-dimensional titanium carbide/carbon nanotube-supported platinum particle composite materials, which can solve the problems to be further studied and the like, and is beneficial to large-scale industrial production, The effect of large specific surface area and good electrical conductivity

Active Publication Date: 2017-07-25
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large specific surface area of ​​two-dimensional titanium carbide, and the excellent electrical conductivity and electrocatalytic activity of MWNTs, which can prevent the re-agglomeration of chemically exfoliated two-dimensional titanium carbide nanosheets, the combination of the two is expected to give full play to the synergistic effect of the two. It can provide more catalytic active sites and help to enhance the electrochemical activity of the material, but the specific performance needs further in-depth study, so far there are few literature reports on MXene-based composite materials

Method used

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  • Preparation method of two-dimensional titanium carbide/carbon nanotube loaded platinum particle composite material
  • Preparation method of two-dimensional titanium carbide/carbon nanotube loaded platinum particle composite material
  • Preparation method of two-dimensional titanium carbide/carbon nanotube loaded platinum particle composite material

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Experimental program
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Effect test

Embodiment 1

[0033] 0.3g of Ti 3 AlC 2 Powder (sifted through a 400-mesh sieve, Ti 3 AlC 2 The particle size is less than 38 μm) soaked in 20mL of 40% HF acid solution at 25°C, and reacted for 24h to obtain a suspension. The obtained suspension was centrifuged and washed several times with water at 4000 rpm for 5 min until the pH value of the supernatant obtained from the last centrifugation was close to neutral. The obtained precipitated product was placed in a vacuum drying oven and dried at 60°C to obtain the MXene phase Ti 3 C 2 powder. Take 100mg of MWNTs and place them in 100mL of a mixed solution of concentrated nitric acid and concentrated sulfuric acid, and reflux at 100°C for 3 hours, where the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1. The resulting suspension was centrifuged and washed several times with water at 8000 rpm for 10 min until the pH of the supernatant obtained from the last centrifugation was close to neutral. The obtaine...

Embodiment 2

[0035] 0.3g of Ti 3 AlC 2 Powder (sifted through a 400-mesh sieve, Ti 3 AlC 2 Particle size less than 38 μm) was soaked in 20 mL of 40% HF acid solution at 25°C, and reacted for 48 hours to obtain a suspension. The obtained suspension was centrifuged and washed several times with water at 5000 rpm for 5 min until the pH value of the supernatant obtained by the last centrifugation was close to neutral. The obtained precipitated product was placed in a vacuum oven and dried at 80°C to obtain the MXene phase Ti 3 C 2 powder. Take 80 mg of MWNTs and place them in 100 mL of a mixed solution of concentrated nitric acid and concentrated sulfuric acid, and reflux at 100 °C for 4 h, where the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1. The resulting suspension was centrifuged and washed several times with water at 8000 rpm for 10 min until the pH of the supernatant obtained from the last centrifugation was close to neutral. The obtained precip...

Embodiment 3

[0037] 0.3g of Ti 3 AlC 2 Powder (sifted through a 400-mesh sieve, Ti 3 AlC 2 Particle size less than 38 μm) was immersed in 15 mL of 40% HF acid solution at 40°C, and reacted for 24 hours to obtain a suspension. The obtained suspension was centrifuged and washed several times with water at 4000 rpm for 5 min until the pH value of the supernatant obtained from the last centrifugation was close to neutral. The obtained precipitated product was placed in a vacuum oven and dried at 80°C to obtain the MXene phase Ti 3 C 2 powder. Take 50 mg of MWNTs and place them in 80 mL of a mixed solution of concentrated nitric acid and concentrated sulfuric acid, and reflux at 110 °C for 2.5 h, where the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1. The resulting suspension was centrifuged and washed several times with water at 8000 rpm for 10 min until the pH of the supernatant obtained from the last centrifugation was close to neutral. The obtained p...

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Abstract

The invention discloses a preparation method of a two-dimensional titanium carbide / carbon nanotube loaded platinum particle composite material. The preparation method comprises the following steps: preparing two-dimensional titanium carbide by chemically peeling off an aluminum atomic layer in Ti3AlC2 by means of HF; and combining the two-dimensional titanium carbide with MWNTs by means of a solvothermal method, and meanwhile, loading the platinum nanoparticles to obtain the Ti3C2 / MWNTs-Pt nano composite material. The preparation method provided by the invention is simple, controllable in process, good in repeatability and low in cost, and industrial production on a large scale is facilitated. The prepared Ti3C2 / MWNTs-Pt nano composite material is large in specific surface area and good in electric conductivity, can be used as an anode catalyst of a direct methanol fuel cell, and shows excellent catalytic activity on methanol oxidation.

Description

technical field [0001] The invention belongs to the field of nanocomposite material preparation, and in particular relates to a method for preparing a two-dimensional titanium carbide / carbon nanotube-supported platinum particle composite material. Background technique [0002] MXene is a new type of two-dimensional graphene-like transition metal carbide or carbonitride nanosheet, which is obtained by selectively etching away the A atomic layer from the ternary layered compound MAX by using HF, because of its graphene-like Two-dimensional structure, named as MXenes phase material. Its chemical formula is M n+1 x n T z , M is a transition group metal element, X is C and / or N element, T represents active functional groups such as hydroxyl, oxygen ion or fluorine ion linked to its surface, n=1, 2 or 3. The precursor MAX phase belongs to the hexagonal crystal system and is composed of alternately arranged M n+1 x n The sheets are connected with the closely packed A atomic l...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/92H01M8/1011B82Y40/00
CPCB82Y40/00H01M4/8647H01M4/88H01M4/925H01M4/926H01M8/1011Y02E60/50Y02P70/50
Inventor 张建峰曹惠杨张欣王红兵
Owner HOHAI UNIV
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