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Preparation method for cerium oxide nanorod array/graphene composite material and application of cerium oxide nanorod array/graphene composite material in photocathode protection

A technology of nanorod arrays and composite materials, applied in the field of preparation of cerium oxide nanorod arrays/graphene composite materials, can solve the problem that cerium oxide nanoparticles cannot conduct electrons quickly and effectively, so as to promote directional transmission and improve light absorption Efficiency, simple preparation method

Active Publication Date: 2020-08-11
江苏纳欧新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The cerium oxide in the existing cerium oxide / graphene composite materials is generally granular, and the cerium oxide nanoparticles cannot conduct electrons quickly and effectively, but the construction of cerium oxide nanorod arrays can effectively conduct electrons

Method used

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  • Preparation method for cerium oxide nanorod array/graphene composite material and application of cerium oxide nanorod array/graphene composite material in photocathode protection
  • Preparation method for cerium oxide nanorod array/graphene composite material and application of cerium oxide nanorod array/graphene composite material in photocathode protection
  • Preparation method for cerium oxide nanorod array/graphene composite material and application of cerium oxide nanorod array/graphene composite material in photocathode protection

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. With 0.01mol / L cerium nitrate as electrolyte, 0.05mol / L potassium chloride as auxiliary electrolyte, 0.1mol / L ammonium chloride as stabilizer, the ratio of the amount of cerium nitrate to ammonium chloride 1:2, the ratio of cerium nitrate to potassium chloride is 1:0.1, Ti is the substrate, Pt is the counter electrode, and the saturated Ag / AgCl electrode is the reference electrode, at 50°C, 0.5mA / cm 2 Potential deposition at a current density of 80min, in CeO 2 Nucleation and growth of CeO on the seed layer 2 nanorod arrays.

[0022] 2. Prepare 50mL of 0.025mol / L SnCl 2 ethanol solution to activate CeO 2 Nanorod array, weigh a certain amount of graphite oxide and dissolve it in 100mL deionized water, and the activated CeO 2 Nanorod arrays were immersed in graphite oxide solution and stirred at 50 °C for 0.5 h, followed by Na 2 SO 4 Rinse with deionized water, and dry in vacuum at 50°C to obtain a ceria nanorod array / graphene composite.

Embodiment 2

[0024] 1. With 0.03mol / L cerium ammonium nitrate as electrolyte, 0.20mol / L potassium chloride as auxiliary electrolyte, 0.3mol / L ammonium acetate as stabilizer, the ratio of the amount of cerium ammonium nitrate to ammonium acetate 1:1, the ratio of cerium ammonium nitrate to potassium chloride is 1:5, ITO conductive glass is the substrate, Pt is the counter electrode, and the saturated Ag / AgCl electrode is the reference electrode, at 70°C, 3mA / cm 2 CeO was grown on the seed layer by potential deposition at a current density of 120 min 2 nanorod arrays.

[0025] 2. Prepare 100mL of 0.05mol / L SnCl 2 ethanol solution to activate CeO 2 Nanorod array, weigh a certain amount of graphite oxide and dissolve it in 200mL deionized water, and the activated CeO 2 Nanorod arrays were immersed in graphite oxide solution and stirred at 70 °C for 2 h, followed by Na 2 SO 4 Rinse with deionized water, and dry in vacuum at 70°C to obtain cerium oxide nanorod arrays / graphene composites. ...

Embodiment 3

[0027] 1. With 0.05mol / L ammonium chloride as electrolyte, 0.35mol / L potassium chloride as auxiliary electrolyte, 0.5mol / L hexamethylenetetramine as stabilizer, ammonium chloride and hexamethylene The ratio of the substance amount of tetramine is 1:0.5, the ratio of the substance amount of ammonium chloride to potassium chloride is 1:10, the FTO conductive glass is the substrate, Pt is the counter electrode, and the saturated Ag / AgCl electrode is the reference electrode. Specific electrode, at 90°C, 5.5mA / cm 2 CeO was grown on the seed layer by potential deposition at a current density of 160 min 2 nanorod arrays.

[0028] 2. Prepare 150mL of 0.075mol / L SnCl 2 ethanol solution to activate CeO 2 nanorod array, weigh a certain amount of graphite oxide and dissolve it in 300mL deionized water, and the activated CeO 2 The nanorod arrays were immersed in graphite oxide solution and stirred at 90 °C for 3.5 h, followed by Na 2 SO 4Rinse with deionized water, and dry in vacuum ...

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Abstract

The invention relates to a preparation method for a cerium oxide nanorod array / graphene composite material and application of the cerium oxide nanorod array / graphene composite material in photocathodeprotection. The preparation method comprises the following steps that a conductive substrate is taken as a substrate, and a CeO2 nanorod array is grown on the substrate through an electro-depositionmethod; and then the CeO2 nanorod array is activated by using a SnCl2 ethanol solution, tin ion is deposited on the CeO2 nanorod array, the CeO2 nanorod array is immersed into a GO solution, GO is reduced into rGO through the tin ion, and meanwhile, electrostatic adsorption is carried out on the tin ion and rGO, so that the CeO2 nanorod array is connected to a graphene upper sheet, and the ceriumoxide nanorod array / graphene composite material is constructed. The cerium oxide nanorod array structure can not only improve the light absorption rate, but also can effectively promote the electron-hole separation and the directional transmission efficiency of carriers under illumination, the physical barrier of a flaky material is combined with the anticorrosion of a traditional photocathode, the synergistic effect between the flaky material and the traditional photocathode is exerted, and the anticorrosion performance is further improved.

Description

technical field [0001] The invention belongs to the technical field of photocathode protection materials, and relates to a preparation method of a cerium oxide nanorod array / graphene composite material and its application in photocathode protection. Background technique [0002] Metal corrosion refers to the damage of metal materials by the action of the surrounding medium. The problems caused by it pervade all walks of life, and the waste of resources caused by it has brought huge losses to the national economy. Traditional anti-corrosion technologies mainly include: adding corrosion inhibitor method, anti-corrosion coating method and electrochemical protection method. These anti-corrosion technologies still have some problems such as relatively complicated process, high cost, short service life or single anti-corrosion performance. Compared with external current cathode and sacrificial anode anticorrosion technology, photoelectrochemical cathodic protection technology has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/04C23F13/14C01B32/184B82Y30/00B82Y40/00
CPCC25D9/04C23F13/14C01B32/184B82Y30/00B82Y40/00
Inventor 姚超左士祥严向玉李霞章刘文杰王灿叶里祥吴红叶
Owner 江苏纳欧新材料有限公司
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