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Preparation method of high-activity nanocrystalline NiO film

A nanocrystalline, high-activity technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of NiO electrochromic performance attenuation, and achieve the improvement of NiO electrochromic performance, electrochromic Good color-causing performance, the effect of avoiding particle agglomeration and adhesion

Active Publication Date: 2021-07-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Finally, NiOOH will produce self-discharge and partial dissolution during the process of fading and reduction, which will attenuate the electrochromic performance of NiO

Method used

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  • Preparation method of high-activity nanocrystalline NiO film
  • Preparation method of high-activity nanocrystalline NiO film
  • Preparation method of high-activity nanocrystalline NiO film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] As shown in Figure 1, the preparation method of a 20-layer NiO film with an electrochromic effect of 67% at a wavelength of 500nm, the specific operations are as follows:

[0021] (1) Clean the conductive glass with common detergent, rinse with deionized water, and then use acetone, ethanol, and deionized water to sonicate for 20 minutes to obtain a conductive glass substrate with a clean surface.

[0022] (2) The PEI aqueous solution that monomer concentration is 0.2M and the nickel nitrate aqueous solution of 0.1M are mixed in equal volumes, and the PEI-Ni complex aqueous solution of 0.1M is obtained, wherein PEI monomer concentration: the concentration of nickel nitrate is 2:1.

[0023] (3) Soak the cleaned conductive glass in the PAA aqueous solution with a monomer concentration of 0.1M for 5 minutes, clean it with deionized water to obtain a negatively charged film on the surface, and then soak it in a 0.1M PEI-Ni complex. After rinsing with deionized water for 5 ...

Embodiment 2

[0027] Such as figure 2 As shown, the preparation method of a 10-layer NiO thin film with electrochromic efficiency reaching 50% at a wavelength of 500nm, the specific operations are as follows:

[0028] (1) Clean the conductive glass with common detergent, rinse with deionized water, and then use acetone, ethanol, and deionized water to sonicate for 20 minutes to obtain a conductive glass substrate with a clean surface.

[0029] (2) The PEI aqueous solution that monomer concentration is 0.2M and the nickel nitrate aqueous solution of 0.1M are mixed in equal volumes, and the PEI-Ni complex aqueous solution of 0.1M is obtained, wherein PEI monomer concentration: the concentration of nickel nitrate is 2:1.

[0030] (3) Soak the cleaned conductive glass in the PAA aqueous solution with a monomer concentration of 0.1M for 5 minutes, clean it with deionized water to obtain a negatively charged film on the surface, and then soak it in a 0.1M PEI-Ni complex. After rinsing with dei...

Embodiment 3

[0034] A method for preparing a NiO thin film with an electrochromic effect of 10% at a wavelength of 500nm, the specific operations are as follows:

[0035] (1) Clean the conductive glass with common detergent, rinse with deionized water, and then use acetone, ethanol, and deionized water to sonicate for 20 minutes to obtain a conductive glass substrate with a clean surface.

[0036] (2) The PEI aqueous solution that monomer concentration is 0.02M and the nickel nitrate aqueous solution of 0.01M are mixed in equal volumes, and the PEI-Ni complex aqueous solution of 0.01M is obtained, wherein PEI monomer concentration: the concentration of nickel nitrate is 2:1.

[0037] (3) Soak the cleaned conductive glass in the PAA aqueous solution with a monomer concentration of 0.01M for 5 minutes, then wash it with deionized water to obtain a negatively charged film on the surface, and then soak it in 0.01M PEI-Ni network 5 minutes in the aqueous solution of NiO, and after cleaning wit...

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Abstract

The invention discloses a preparation method of a high-activity nanocrystalline NiO film. The preparation method comprises the following steps: (1) preparing a NiO precursor film on a substrate through a layer-by-layer self-assembly method; and (2) irradiating the NiO precursor film under ultraviolet light, decomposing organic matters in the NiO precursor film by utilizing ultraviolet light, and crystallizing NiO into nano particles to prepare the high-activity nanocrystalline NiO film. The high-activity NiO nano-film is prepared by utilizing the method of combining ultraviolet irradiation and layer-by-layer self-assembly; the method is simple and low in cost, complex equipment is not needed; and the prepared NiO film has high activity, and the electrochromic efficiency at the wavelength of 500 nm can reach 67%.

Description

technical field [0001] The invention relates to a method for preparing a NiO thin film, in particular to a method for preparing a highly active nanocrystalline NiO thin film. Background technique [0002] NiO thin films have broad application prospects in many fields such as supercapacitors, electrochromic materials, sensors, solar cells, and photodiodes. NiO is an anodic color-changing material with good electrochromic properties. It can undergo reversible redox reactions in water-soluble or organic-soluble electrolytes, and can produce reversible switching between transparent reduced states and brown-black oxidized states. It has the function of causing color change, and has the advantages of fast electrochromic response speed and large color changing range. However, the stability and cycleability of NiO are poor, and its performance will decline after long-term operation. For example, in alkaline electrolyte, NiO will become NiOOH through oxidation and coloring reaction,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/27C01G53/04B82Y30/00
CPCC03C17/27C01G53/04B82Y30/00C03C2217/217C01P2002/82C01P2004/04
Inventor 章建辉施泽宇顾明
Owner NANJING UNIV
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