Polydopamine coated copper nanowire composite material as well as preparation method thereof and application thereof

A technology of polydopamine and composite materials, applied in the direction of nanotechnology, transportation and packaging, metal processing equipment, etc., can solve the problem of insufficient selectivity of stable methane, achieve improved chemical stability and thermal stability, simple preparation method, low cost effect

Active Publication Date: 2019-01-01
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

[0005] For copper in the prior art as CO 2 The RR catalyst has the problems of insufficient stability and methane selectivity. The purpose of the present invention is to provide a composite material that uses chemically active polydopamine to wrap copper nanowires. 2 In the process of catalytic conversion of methane by RR, it has the characteristics of good stability, high catalytic activity and good selectivity.

Method used

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  • Polydopamine coated copper nanowire composite material as well as preparation method thereof and application thereof
  • Polydopamine coated copper nanowire composite material as well as preparation method thereof and application thereof
  • Polydopamine coated copper nanowire composite material as well as preparation method thereof and application thereof

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Embodiment 1

[0031] 1) Synthesis of polydopamine-wrapped modified copper nanowires:

[0032] Take 20mL 15M NaOH (98%), 1mL 0.1M Cu(NO 3 ) 2 (98%), 0.1 mL of ethylenediamine (EDA, 99%) was placed in a three-necked flask, the flask was placed in a water bath at 70°C, and stirred at 250 rpm for 5 min. Then hydrazine hydrate (10.5 μl, N 2 H 4 ,35wt.%in H 2 O), increase the stirring rate to 2 times. The final Cu(NO 3 ) 2 ,EDA,N 2 H 4 The dosages are 4.74mM, 70mM, 5.5mM respectively. After 60min of reaction, suction filtration, and the brown-red solid on the filter membrane is washed with a large amount of 3% N 2 H 4 The solution was washed, and the obtained solid was placed in a vacuum drying oven at 60 °C for 8 h. Dissolve an appropriate amount of dopamine hydrochloride (1.2 mg, 2.5 mg, 5.0 mg, 10 mg) in 100 mL of deionized water, use KHCO 3 / K 2 CO 3 Solution Adjust the pH of the solution to 8.5. Weigh 50 mg of copper nanowires and ultrasonically disperse them in the above soluti...

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Abstract

The invention discloses a polydopamine coated copper nanowire composite material as well as a preparation method thereof and application thereof. The polydopamine coated copper nanowire composite material consists of polydopamine coated copper nanowires. The preparation method for the polydopamine coated copper nanowire composite material comprises the steps that through in situ oxidative polymerization and coating of dopamine on the surfaces of copper nanowires, the polydopamine coated copper nanowire composite material is obtained; and the polydopamine coated copper nanowire composite material can improve methane selectivity and shows high stability in an electro-catalytic CO2 reduction process.

Description

technical field [0001] The present invention relates to a CO 2 RR catalyst, specifically relates to a polydopamine-coated copper nanowire composite material, and also relates to a method for preparing the polydopamine-coated copper nanowire composite material by in-situ polymerization, and the polydopamine-coated copper nanowire composite material as CO 2 RR catalyst for CO reduction via electrocatalysis 2 The method for preparing methane with high selectivity belongs to the fields of carbon dioxide emission reduction and utilization and synthesis and application of electrocatalytic materials. Background technique [0002] Due to the massive consumption of fossil fuels such as coal, oil, and natural gas by the industrial society, the uncontrolled exploitation of fossil fuels leads to shortage of resources, and the combustion of fossil fuels produces a large amount of CO 2 exacerbate the greenhouse effect. So the CO 2 Converting into renewable energy can not only solve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C25B3/04C25B11/06B82Y40/00C25B3/25
CPCB82Y40/00C25B3/25C25B11/095B22F1/102
Inventor 刘恢向开松柴立元朱芳芳刘雨程颜旭郑谐李青竹
Owner CENT SOUTH UNIV
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