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A kind of heterojunction metal anticorrosion pigment

An anti-corrosion pigment and heterojunction technology, applied in the direction of inorganic pigment treatment, fibrous fillers, chemical instruments and methods, etc., can solve the problems of single photocathode protection, etc., to improve anti-corrosion performance, prevent contact, and excellent anti-corrosion performance effect

Active Publication Date: 2022-03-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a novel friendly ZnO material and substoichiometric WO are proposed 2.92 The strategy of TMOs constructing heterojunction, the present invention helps to solve the limitation of current single anti-corrosion method and photocathode protection that can only improve barrier and shielding performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, take 5.00 g H 2 WO 4 and 1.26 g H 2 C 2 o 4 2H 2 O in a beaker, add 20 mL of pure water and magnetically stir evenly. Then, a certain amount of hydrazine hydrate solution (2.40 mL and 0 mL) was slowly added dropwise with stirring, and the stirring was continued for 30 min. The obtained product was dried in a vacuum oven at 60 °C for 8 h, and light blue and yellow precursor powders were obtained after grinding. Finally, put the precursor in a quartz boat and put it into a quartz tube, heat it up to 500 °C for 30 minutes in the nitrogen atmosphere of the tube furnace, and cool to room temperature to obtain tungsten oxide powder, which are named as WO 2.92 . The above obtained WO 2.92 The solid powder was added to 0.25 mol / L Zn(NO 3 ) 2 In the solution, slowly drop 0.5 mol / L NaOH solution into the resulting suspension under magnetic stirring to produce precipitation. After continuous stirring for 1 h, the precipitate was filtered, washed several times wit...

Embodiment 2

[0019] First, take 5.00 g H 2 WO 4 and 1.26 g H 2 C 2 o 4 2H 2 O in a beaker, add 20 mL of pure water and magnetically stir evenly. Then, a certain amount of hydrazine hydrate solution (2.40 mL and 0 mL) was slowly added dropwise with stirring, and the stirring was continued for 30 min. The obtained product was dried in a vacuum oven at 100 °C for 2 h, and light blue and yellow precursor powders were obtained after grinding. Finally, the precursors were placed in a quartz boat and placed in a quartz tube, heated to 800 °C for 30 min in a nitrogen atmosphere in a tube furnace, and cooled to room temperature to obtain tungsten oxide powders, which were named WO 2.92 . The above obtained WO 2.92 The solid powder was added to 0.25 mol / L Zn(NO 3 ) 2 In the solution, slowly drop 0.5 mol / L NaOH solution into the resulting suspension under magnetic stirring to produce precipitation. After continuous stirring for 1 h, the precipitate was filtered, washed several times with p...

Embodiment 3

[0021] First, take 5.00 g H 2 WO 4 and 1.26 g H 2 C 2 o 4 2H 2 O in a beaker, add 20 mL of pure water and magnetically stir evenly. Then, a certain amount of hydrazine hydrate solution (2.40 mL and 0 mL) was slowly added dropwise with stirring, and the stirring was continued for 30 min. The obtained product was dried in a vacuum oven at 90 °C for 6 h, and light blue and yellow precursor powders were obtained after grinding. Finally, put the precursor in a quartz boat and put it into a quartz tube, heat it up to 500 °C for 30 minutes in the nitrogen atmosphere of the tube furnace, and cool to room temperature to obtain tungsten oxide powder, which are named as WO 2.92 . The above obtained WO 2.92 The solid powder was added to 0.25 mol / L Zn(NO 3 ) 2 In the solution, slowly drop 0.5 mol / L NaOH solution into the resulting suspension under magnetic stirring to produce precipitation. After continuous stirring for 1 h, the precipitate was filtered, washed several times wit...

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PUM

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Abstract

The invention belongs to the technical field of material chemistry, and in particular relates to a preparation method of a heterojunction metal anticorrosion pigment. Heterojunction metal anticorrosion pigments are composed of zinc oxide and tungsten oxide, with a two-dimensional nanosheet array structure and photoelectric properties, which effectively inhibit the transfer of water and chloride ions, the interaction between the mass-junction two-component interface and the defect oxygen The existence of vacancies can prevent the contact between corrosive ions and the metal surface, thereby exerting an effective anti-corrosion effect and showing extremely excellent anti-corrosion performance.

Description

technical field [0001] The invention belongs to the technical field of inorganic fine chemicals, and in particular relates to a preparation process of a heterojunction metal anticorrosion pigment. Background technique [0002] It is well known that transition metal oxides (TMOs) semiconductors have potential applications in the field of corrosion protection as a new available energy source due to their optoelectronic properties. Their photoelectric effect generates photogenerated electron-hole pairs under irradiation of suitable wavelength. The separated electrons and holes affect the corrosion reaction of the metal surface. However, the recombination of internal electrons and holes still limits the reactivity. Therefore, the design of transition metal oxide heterojunction structures has attracted extensive attention due to their interfacial properties, such as superconductivity, magnetism, high catalytic activity, corrosion resistance, etc. Numerous studies have shown th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/62C09C3/06C09C1/04
Inventor 刘金库郭小娇周丹杨秀卢怡张敏孙慧萍白雪高力王忠琳
Owner EAST CHINA UNIV OF SCI & TECH
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