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Copper-nickel alloy nanowire/titanium dioxide composite material as well as preparation method and application thereof

A technology of copper-nickel alloy and titanium dioxide, which is applied in the field of nano-composite materials with new binary metal alloy semiconductor heterostructure and its preparation, can solve the problem of low Schottky barrier and photocatalytic activity at the metal-semiconductor heterojunction. , easy deactivation and denaturation of materials, etc., to achieve the effect of inhibiting recombination rate, improving photocatalytic activity, and highly uniform and stable

Inactive Publication Date: 2017-05-31
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, CuNW / TiO 2 Due to the low Schottky barrier at the metal-semiconductor heterojunction, the material is not conducive to inhibiting the recombination rate of electron-hole pairs to a certain extent, so its photocatalytic activity still needs to be improved, and copper nanowires / TiO 2 The material is easily deactivated and denatured, which greatly limits its practical application

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  • Copper-nickel alloy nanowire/titanium dioxide composite material as well as preparation method and application thereof
  • Copper-nickel alloy nanowire/titanium dioxide composite material as well as preparation method and application thereof
  • Copper-nickel alloy nanowire/titanium dioxide composite material as well as preparation method and application thereof

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preparation example Construction

[0055] Preparation of organic solvent dispersion of copper-nickel alloy nanowires. The copper-nickel alloy nanowire is dispersed in a dispersant (organic solvent), and a uniform and stable copper-nickel alloy nanowire dispersion liquid with a certain concentration is obtained after ultrasonic dispersion. Specifically, the copper-nickel alloy nanowires obtained by reducing copper acetylacetonate were first washed three times with isopropanol, then washed three times with ethanol, and finally ultrasonically dispersed in a dispersant to obtain uniform and stable copper-nickel alloy nanowires. line dispersion. The dispersant of the copper-nickel alloy nanowire dispersion liquid can be an organic solvent, preferably at least one of ethanol, methanol, isopropanol, ethylene glycol, toluene and acetone. In addition, the preparation method of the copper-nickel alloy nanowires in the present invention includes but not limited to the method of reducing copper acetylacetonate (see patent...

Embodiment 1

[0068] Disperse 0.0272g of copper-nickel alloy nanowires in 100ml of ethanol and ultrasonically disperse for 30 minutes to obtain a uniform and stable dispersion of copper-nickel alloy nanowires with good dispersion. Add 10ml of deionized water to the dispersion, continue stirring and then drop 10.06ml of titanium isopropoxide, continue to stir for 1h, after fully stirring, centrifuge and wash 4 times with alcohol at a speed of 4000rpm, put it in a vacuum oven at 60°C for 12h, and then place the obtained powder precursor in an argon atmosphere After annealing at 400° C. for 3 hours, a copper-nickel alloy nanowire / titanium dioxide composite material powder is obtained, wherein the weight ratio of the copper-nickel alloy nanowire is 1%. see image 3 , Figure 4 , which shows the SEM image and TEM image of the obtained copper-nickel alloy nanowire / titanium dioxide composite material powder, from which it can be seen that the obtained copper-nickel alloy nanowire / titanium dioxide...

Embodiment 2

[0072] Disperse 0.0412g of copper-nickel alloy nanowires in 100ml of ethanol and ultrasonically disperse for 30 minutes to obtain a uniform, stable and well-dispersed copper-nickel alloy nanowire dispersion. Add 10ml of deionized water to the dispersion, continue stirring and then drop 4. 978ml of titanium isopropoxide, continue to stir for 1h, after fully stirring, centrifuge and wash 4 times with alcohol at a speed of 4000rpm, put it in a vacuum oven at 60°C for 12h, and then place the obtained powder precursor in an argon atmosphere After annealing at 400° C. for 3 hours, a copper-nickel alloy nanowire / titanium dioxide composite material powder is obtained, wherein the weight ratio of the copper-nickel alloy nanowire is 3%. see Figure 5 , 6 , which shows the SEM image and TEM image of the obtained copper-nickel alloy nanowire / titanium dioxide composite material powder, from which it can be seen that the obtained copper-nickel alloy nanowire / titanium dioxide composite mate...

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Abstract

The invention relates to a copper-nickel alloy nanowire / titanium dioxide composite material as well as a preparation method and application thereof. The copper-nickel alloy nanowire / titanium dioxide composite material comprises copper-nickel alloy nanowires and titanium dioxide granules which are grown on surfaces of the copper-nickel alloy nanowires in situ. The titanium dioxide granules are grown on the surfaces of the copper-nickel alloy nanowires by using a wet chemical method, so that the copper-nickel alloy nanowire / titanium dioxide composite material can be prepared, and the purposes that VOCs are effectively degraded and thus air is purified can be achieved when the copper-nickel alloy nanowire / titanium dioxide composite material is applied to photocatalytic acetaldehyde degradation under visible light.

Description

technical field [0001] The invention relates to a nano-composite material with a novel binary metal alloy semiconductor heterostructure and a preparation method thereof, belonging to the field of preparation of photocatalytic materials. Background technique [0002] Titanium dioxide (TiO 2 ) is widely used in solar cells, photocatalytic hydrogen production, and photocatalytic degradation of organic and inorganic pollutants as an ideal semiconductor material due to its stable physical and chemical properties, chemical and photocorrosion resistance, non-toxicity, and low cost. But TiO 2 As a typical wide bandgap semiconductor material, there are still some obvious shortcomings. Its bandgap is too large, the photoresponse range is narrow, and it can only be excited by ultraviolet light; and TiO 2 The excited electron-hole pairs are easy to recombine, resulting in the reduction of photocatalytic efficiency, which has many limitations in practical applications. With the develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01D53/86B01D53/72
CPCB01D53/8668B01J23/755B01D2257/70B01D2257/708B01D2257/7027B01D2259/802B01D2259/804B01J35/393B01J35/39B01J35/40B01J35/50
Inventor 孙静朱书影谢晓峰王焱陆冠宏
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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