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Method for directly growing Prussian-blue film on FTO conductive glass

A technology of conductive glass and Prussian blue, which is applied in the field of growing Prussian blue film directly on FTO conductive glass, can solve the problems of the uniformity of the concentration film thickness, the instability of the Prussian blue film, and the low cycle stability of the film. The effect of low requirements, low price and low cost

Inactive Publication Date: 2016-12-21
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Prussian blue film prepared by electrodeposition has poor adhesion to conductive glass, the cycle stability of the film is low, and the film is easy to fall off within a certain number of cycles. This shortcoming seriously restricts the preparation of Prussian blue by electrodeposition. The preparation of Prussian blue film by spin coating is to disperse the prepared Prussian blue powder in ethanol to prepare a spin coating liquid, and adjust the speed to spin coating to form a film. Usually, the spin coating film requires high temperature heat treatment to improve the thin film. Bonding force, but Prussian blue is not resistant to high temperature and cannot be heat treated, so the Prussian blue film prepared by spin coating method is unstable, and the rotation speed and the concentration of spin coating liquid will have a great impact on the thickness and uniformity of the film
The Prussian blue self-assembled film has only appeared in recent years. It is easy to operate and can be prepared in a large area. However, because the driving force of film formation is the interaction force between molecules in the layer, the stability of the film is poor.

Method used

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  • Method for directly growing Prussian-blue film on FTO conductive glass
  • Method for directly growing Prussian-blue film on FTO conductive glass
  • Method for directly growing Prussian-blue film on FTO conductive glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Ultrasonic dispersion of 0.66 g of potassium ferricyanide and 0.3 g of oxalic acid in 60 ml of deionized water.

[0030] 2) Add 0.5 ml of concentrated hydrochloric acid to the solution obtained in 1), then transfer it to the core of the polytetrafluoroethylene reactor, and then put a piece of FTO conductive glass with a size of 2.5 cm × 5 cm in the core of the reactor, with the conductive surface facing down , and placed in an oven at 100 °C for 24 h, then cooled to room temperature naturally.

[0031] 3) Take out the FTO conductive glass in 2) the reaction kettle, rinse it with deionized water and dry it with a hair dryer to get the Prussian blue film.

[0032] The SEM photo of the Prussian blue film prepared in the present embodiment is as follows figure 1 As shown, the particles are cubic in shape.

Embodiment 2

[0034] 1) Ultrasonic dispersion of 0.66 g of potassium ferricyanide and 0.25 g of glucose in 60 ml of deionized water.

[0035] 2) Add 1 ml of concentrated hydrochloric acid to the solution obtained in 1), then transfer it to the core of the polytetrafluoroethylene reactor, and then put a piece of FTO conductive glass with a size of 2.5 cm × 5 cm in the core of the reactor, with the conductive surface facing down , and placed in an oven at 120 °C for 3 h, then cooled to room temperature naturally.

[0036] 3) Take out the FTO conductive glass in 2) the reaction kettle, rinse it with deionized water and dry it with a hair dryer to get the Prussian blue film.

[0037] The SEM picture of the Prussian blue thin film prepared in the present embodiment is as follows figure 2 As shown, the particles are spherical; the SEM image of the cross-section is shown in the figure

[0038] 4, it is obvious that there is a layer of Prussian blue particles covering the FTO layer. Figure 5 T...

Embodiment 3

[0040] 1) 0.33 g of potassium ferricyanide and 0.5 g of polyvinylpyrrolidone were ultrasonically dispersed in 60 ml of deionized water.

[0041] 2) Add 0.5 ml of concentrated hydrochloric acid to the solution obtained in 1), then transfer it to the core of the polytetrafluoroethylene reactor, and then put a piece of FTO conductive glass with a size of 2.5 cm × 5 cm in the core of the reactor, with the conductive surface facing down , and placed in an oven at 120 °C for 12 h, then cooled to room temperature naturally.

[0042] 3) Take out the FTO conductive glass in 2) the reaction kettle, rinse it with deionized water and dry it with a hair dryer to get the Prussian blue film. Its XRD spectrum is as image 3 shown.

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Abstract

The invention discloses a method for directly growing a Prussian-blue film on FTO conductive glass. The method includes: mixing potassium ferricyanide, reducing agent, concentrated hydrochloric acid and deionized water, transferring into a hydrothermal reaction kettle, placing a piece of FTO conductive glass into the hydrothermal reaction kettle, allowing the conductive face of the conductive glass to face downwardly, performing constant-temperature hydrothermal reaction at 100-120 DEG C for a certain period of time, and naturally cooling to room temperature after the reaction, wherein the reducing agent is optionally selected from glucose, oxalic acid or polyvinyl pyrrolidone; taking out the FTO conductive glass in the reaction kettle, washing with the deionized water, and blowing with a blower for drying to obtain the Prussian-blue film. The Prussian-blue film prepared by the method is good in electrochromic effect.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for directly growing a Prussian blue film on FTO conductive glass. Background technique [0002] Prussian blue, also known as Berlin blue, its molecular formula is Fe 4 [Fe(CN) 6 ] 3 , an ancient blue dye. It has a three-dimensional network structure, and different oxidation states and reduction states can present different colors. It has good electrochemical reversibility, high stability, low preparation cost, and can quickly interact with alkali metal ions in solution. Therefore, Prussian blue is widely used in the fields of biosensors, electrocatalysis, secondary batteries and electrochromism. In addition, due to the short response time and high coloring efficiency of Prussian blue electrochromic thin films, they have been highly valued in recent years. [0003] At present, the preparation methods of Prussian blue thin films are mainly electrodeposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/22
CPCC03C17/22
Inventor 王金敏钱江华马董云
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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