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A kind of nano-bismuth vanadate-zinc electroplating layer and its preparation method and application

A bismuth vanadate and zinc electroplating technology, which is applied in coatings, electrolytic components, electrolytic processes, etc., can solve the problems of poor mechanical properties, inability to apply to real sea application environments, and inability to apply nano-photocatalytic materials, etc., to achieve a good barrier effect , strong substrate bonding method, corrosion resistance and photocatalytic antibacterial performance improvement effect

Active Publication Date: 2020-09-04
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these photocatalytic nanomaterials exist in the form of powder and can only be applied in water environment. Even if the sol-gel method or coating method is used to form a thin film on the surface of the substrate, although the antifouling effect is achieved, the Its mechanical properties are very poor, so it cannot be used in real sea application environment [2]
Although the latest research shows that some photocatalytic nanomaterials can be grown in situ to obtain thin films, it is limited to semiconductor metal oxides and cannot be applied to a wider range of nanophotocatalytic materials. [3]

Method used

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  • A kind of nano-bismuth vanadate-zinc electroplating layer and its preparation method and application
  • A kind of nano-bismuth vanadate-zinc electroplating layer and its preparation method and application
  • A kind of nano-bismuth vanadate-zinc electroplating layer and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of nano-bismuth vanadate-zinc composite electroplating layer

[0036] 1) Preparation of dendritic bismuth vanadate: Bi(NO 3 ) 3 ·5H 2 O nitric acid solution as A solution; in NH 4 VO 3Add polyvinylpyrrolidone (PVP) to the NaOH solution to obtain solution B; then add solution B dropwise to solution A under magnetic stirring, and adjust the pH of the suspension to 7, and continue to stir for 60 minutes; transfer the suspension to In a high-pressure reactor, heat treatment at 160°C for 24 hours; after the reaction, the product was filtered to obtain dendritic nano-BiVO 4 [2] .

[0037] Among them, A solution is Bi(NO 3 ) 3 ·5H 2 Nitric acid solution of O, where Bi(NO 3 ) 3 ·5H 2 O and HNO 3 The ratio of the amount of substances is 1:10; B solution is NH 4 VO 3 NaOH solution, where NaOH and NH 4 VO 3 The ratio of the amount of substances is 1:10, then in 100mLNH 4 VO 3 Add 0.5 g of PVP to the NaOH solution.

[0038] 2) Zinc sulfate plating so...

Embodiment 2

[0050] Comparison of current efficiency between nano-bismuth vanadate-zinc electroplating layer and pure zinc electroplating layer:

[0051] The nanometer bismuth vanadate-zinc electroplating layer is prepared for the above-mentioned embodiment 1;

[0052] The pure zinc electroplating layer is: prepared in SBlank under the same electrodeposition conditions as the nano-bismuth vanadate-zinc electroplating layer;

[0053] Then to pure zinc electroplating layer and nanometer bismuth vanadate-zinc electroplating layer, weigh coating quality before and after deposition, calculate the cathodic current efficiency in the deposition process according to formula (1) (referring to Figure 4 ).

[0054]

[0055] Among them, η c is the cathode current efficiency; m 1 is the mass of the sample before deposition, g; m 2 is the mass of the sample after deposition, g; e is the charge carried by electrons, C; j is the current density, mA cm -2 ; S is the deposition reaction area exposed...

Embodiment 3

[0058] Antibacterial performance of nano-bismuth vanadate-zinc electroplating coating

[0059] Prepare pure zinc electroplating layer (CB1, CB2, CB3, CB4) and nanometer bismuth vanadate-zinc electroplating layer (CV1, CV2, CV3, CV4) according to step in embodiment 1, soak in 10 7 cfu / mL Escherichia coli (E.coli) phosphate-buffered saline (PBS) bacteria solution, soaked in the dark state and 4000mW visible light conditions for 2h respectively. After taking out, utilize the K2081 type dyeing agent of APE Company to carry out fluorescence microscope observation after the bacteria staining on the coating surface ( Figure 5 ), and calculate the attachment rate ( Figure 6 ).

[0060] Taking the pure zinc electroplating layer CB2 and the nano-bismuth vanadate-zinc electroplating layer CB2 prepared under the condition of 15W ultrasonic as an example, the fluorescence micrographs are as follows: Figure 5 shown. The stained bacterial cells can fluoresce and appear as bright spots...

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Abstract

The invention belongs to the field of electrochemical coating layers, and particularly relates to a photocatalysis type nanometer bismuth vanadate-zinc electroplating layer with antibacterial and corrosion-resistant properties and a preparation method and application thereof. In a non-toxic sulfate plating liquid system containing nanometer bismuth vanadate, the constant-current electrodepositionis performed at the surface of the substrate by the ultrasonic waves and the stirring-assisting method, so as to obtain the nanometer bismuth vanadate-doped antibacterial and corrosion-resistant zincplating layer. The nanometer bismuth vanadate-zinc composite electroplating layer has the advantages that the surface is dense, the potential is negative, the environment-friendly effect is good, theantibacterial property is efficient, and the like; the nanometer bismuth vanadate-zinc electroplating layer is suitable for the green protection on steel and iron materials in the multiple biologicalactive environments, and the application value is good.

Description

technical field [0001] The invention belongs to the field of electrochemical plating, and in particular relates to a photocatalytic antibacterial and corrosion-resistant nano-bismuth vanadate-zinc electroplating layer and a preparation method and application thereof. Background technique [0002] Among many protective metal coatings for steel, zinc coating has negative self-corrosion potential, dense crystal structure and good barrier effect, and has been widely used in steel protection. However, the marine environment is a corrosive environment with very high biological activity. The microbial corrosion and biofouling problems caused by biological activity have always threatened the safe operation of artificial steel facilities. Therefore, for the biological activity of steel facilities in the marine environment Control matters. [0003] At present, for the corrosion and fouling of biological activities, the conventional protection method is to use organic coatings or inor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D3/22C25D5/20C25D21/10
CPCC25D3/22C25D5/20C25D15/00C25D21/10
Inventor 翟晓凡管方段继周鞠鹏王楠李科
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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