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Zinc oxide/graphene oxide composite optical switch material and electrochemical preparation method thereof

A graphene composite and zinc oxide technology, which is applied in the preparation of electricity and energy conversion materials, and in the field of light, can solve the problems of excessive coating film thickness and uneven film thickness, and achieve simple production conditions, control of photoelectric performance, and low production cost. Effect

Inactive Publication Date: 2012-01-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of forming a film of graphene prepared by the redox method includes spin coating, pulling film formation, spraying film formation, etc. However, due to the uneven film thickness of the graphene prepared by the chemical redox method during the film formation process, the coated film In recent years, some people have prepared uniform nanoscale graphene oxide films by electrochemical deposition ([1]Guo, C.X., et al.,. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2010. 49(17): p. 3014-3017.)

Method used

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  • Zinc oxide/graphene oxide composite optical switch material and electrochemical preparation method thereof
  • Zinc oxide/graphene oxide composite optical switch material and electrochemical preparation method thereof

Examples

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Embodiment 1

[0022] Weigh 10 mg of graphene oxide, disperse it in 50 ml of deionized water, and ultrasonically disperse it evenly, then electrochemically deposit it using a three-electrode system. The working electrode is made of ITO conductive glass (resistance 15Ω / square), and the deposition area is 1 cm 2 , the counter electrode is made of platinum, and the reference electrode is made of calomel electrode. Constant current 0.5mA / cm at 25°C 2 Deposit for 150 seconds. The product was blown dry under nitrogen to obtain an ITO electrode covered with a graphene oxide film. Weigh 297.5mg Zn(NO 3 ) 2 ·6H 2 O was dispersed in 50ml of deionized water and electrochemically deposited using a three-electrode system. The working electrode was a prepared ITO electrode covered with a graphene oxide film, and the deposition area was 1cm. 2 , the counter electrode is made of platinum, and the reference electrode is made of calomel electrode. Constant voltage -1V deposition time 20 minutes at 65°C...

Embodiment 2

[0025] Weigh 10 mg of graphene oxide, disperse it in 50 ml of deionized water, and ultrasonically disperse it evenly, then electrochemically deposit it using a three-electrode system. The working electrode is made of ITO conductive glass (resistance 15Ω / square), and the deposition area is 1 cm 2 , the counter electrode is made of platinum, and the reference electrode is made of calomel electrode. Constant current 0.5mA / cm at 25°C 2 Deposit for 150 seconds. The product was blown dry under nitrogen to obtain an ITO electrode covered with a graphene oxide film. Weigh 148.75mg Zn(NO 3 ) 2 ·6H 2 O was dispersed in 50ml of deionized water and electrochemically deposited using a three-electrode system. The working electrode was a prepared ITO electrode covered with a graphene oxide film, and the deposition area was 1cm. 2, the counter electrode is made of platinum, and the reference electrode is made of calomel electrode. Constant voltage -1V deposition time 20 minutes at 6...

Embodiment 3

[0028] Weigh 10 mg of graphene oxide, disperse it in 50 ml of deionized water, and ultrasonically disperse it evenly, then electrochemically deposit it using a three-electrode system. The working electrode is made of ITO conductive glass (resistance 15Ω / square), and the deposition area is 1 cm 2 , the counter electrode is made of platinum, and the reference electrode is made of calomel electrode. Constant current 0.5mA / cm at 25°C 2 Deposit for 225 seconds. The product was blown dry under nitrogen to obtain an ITO electrode covered with a graphene oxide film. Weigh 223.12mg Zn(NO 3 ) 2 ·6H 2 O was dispersed in 50ml of deionized water and electrochemically deposited using a three-electrode system. The working electrode was a prepared ITO electrode covered with a graphene oxide film, and the deposition area was 1cm. 2 , the counter electrode is made of platinum, and the reference electrode is made of calomel electrode. Constant voltage -1V deposition time 15 minutes at ...

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Abstract

The invention discloses a zinc oxide / graphene oxide composite optical switch material and an electrochemical preparation method thereof. The composite material uses conductive glass as the substrate and is prepared by depositing a columnar zinc oxide film with thickness of 300-800 nm on an electrochemically deposited graphene oxide film with thickness of 8-30 nm through an electrochemical deposition method. The preparation method comprises the following steps: depositing a graphene oxide film with thickness of 8-30 nm by using a three-electrode system and taking indium tin oxide (ITO) as the working electrode; and then depositing columnar zinc oxide nano-crystals in a zinc nitrate solution by using the three-electrode system and taking the uniformly deposited graphene oxide film electrode as the working electrode to obtain the zinc oxide / graphene oxide composite optical switch material. The prepared composite material has the advantages of good film-forming property, uniform thickness, controllable optical and electrical properties, short photoelectric response time and the like; and the preparation process is simple, the yield is high and the period is short.

Description

technical field [0001] The invention relates to a zinc oxide / graphene oxide composite optical switch material and an electrochemical preparation method thereof, belonging to the preparation technology of optical, electrical and energy conversion materials. Background technique [0002] Zinc oxide is an excellent semiconductor oxide material with a band gap of 3.37eV and an exciton binding energy as high as 60MeV at room temperature. When its size is small, the specific surface area increases sharply, thus producing a series of strange physical effects, such as quantum confinement effect, surface effect, macroscopic quantum tunneling effect, etc., making it have many advantages in optics, electricity, magnetism, chemistry, etc. Singular characteristics, thus producing special properties that its bulk materials do not have. It has a wide application in photoelectric devices, chemical industry, medicine and many other aspects, and its prospect is very broad. [0003] The opt...

Claims

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Application Information

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IPC IPC(8): C25D9/00H01L31/0248H01L31/18
CPCY02P70/50
Inventor 封伟薛宗岳冯奕钰
Owner TIANJIN UNIV
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