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Preparation method of self-assembly Ni-MOFs electrochromic QR code device

An electrochromic and self-assembly technology, applied in chemical instruments and methods, color-changing fluorescent materials, etc., can solve the problems of high equipment and substrates, and achieve the effect of low cost, low driving voltage, and maintaining the color unchanged for a long time.

Active Publication Date: 2018-05-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current synthesis of MOFs is mostly hydrothermal method, which has high requirements for equipment and substrates. Therefore, at a lower temperature, MOFs films are prepared by self-assembly of covalent bonds between metal ions and ligands. Its industrialization and mass production are of great significance

Method used

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  • Preparation method of self-assembly Ni-MOFs electrochromic QR code device
  • Preparation method of self-assembly Ni-MOFs electrochromic QR code device
  • Preparation method of self-assembly Ni-MOFs electrochromic QR code device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Dissolve 3mmol 1,4,5,8-naphthalene tetracarboxylic anhydride and 4.4mmol 5-amino-2-hydroxybenzoic acid in 100mL toluene and react at 150°C for 12h, then filter, wash with 1mol / L hydrochloric acid, and dry , the naphthalene tetracarboxylic anhydride-based ligand was obtained as an orange solid.

[0035] (2) Dissolve 0.6mmol of the naphthalene tetracarboxylic anhydride-based ligand obtained in step (1) in 20mL DMF to obtain solution A; simultaneously dissolve 2mmol nickel nitrate hexahydrate in 20mL ethanol to obtain solution B; pretreat the FTO glass, and Immerse in deionized water, acetone, and ethanol for 10 minutes of ultrasonic cleaning, dry, and then irradiate with ultraviolet ozone for 40 minutes, and then place them in the above solution A, ethanol, solution B and ethanol for 10 minutes each for self-assembly. The self-assembly temperature is 30 ° C. After 40 cycles and vacuum drying at 60°C for 10 h, an FTO electrode with a self-assembled Ni-MOFs film attache...

Embodiment 2

[0040] (1) Dissolve 1mmol of 1,4,5,8-naphthalene tetracarboxylic anhydride and 2mmol of 5-amino-2-hydroxybenzoic acid in 50mL of toluene and react at 130°C for 6h, then filter, wash with 1mol / L hydrochloric acid, and dry. The naphthalene tetracarboxylic anhydride-based ligand was obtained as an orange solid.

[0041](2) Dissolve 1 mmol of the naphthalene tetracarboxylic anhydride-based ligand obtained in step (1) in 20 mL of DMF to obtain solution A; at the same time, dissolve 1 mmol of nickel nitrate hexahydrate in 20 mL of ethanol to obtain solution B; pretreat the FTO glass, and then immerse Ultrasonic washing in deionized water, acetone and ethanol for 10 minutes, drying, and then ultraviolet ozone irradiation for 40 minutes, followed by placing in the above solution A, ethanol, solution B and ethanol for 30 minutes each for self-assembly, self-assembly temperature is 50 ° C, cycle 30 times, vacuum drying at 40 °C for 24 h, and the FTO electrode with self-assembled Ni-MOFs...

Embodiment 3

[0045] (1) Dissolve 2mmol 1,4,5,8-naphthalene tetracarboxylic anhydride and 2mmol 5-amino-2-hydroxybenzoic acid in 100mL toluene and react at 160°C for 10h, then filter, wash with 2mol / L hydrochloric acid, and dry. The naphthalene tetracarboxylic anhydride-based ligand was obtained as an orange solid.

[0046] (2) Dissolve 2mmol of the naphthalene tetracarboxylic anhydride-based ligand obtained in step (1) in 20mL DMF to obtain solution A; simultaneously dissolve 1.3mmol nickel nitrate hexahydrate in 20mL ethanol to obtain solution B; pretreat the FTO glass, and Immerse in deionized water, acetone and ethanol, ultrasonically wash for 10 minutes, dry, and then irradiate with ultraviolet and ozone for 40 minutes, then place in the above solution A, ethanol, solution B and ethanol for 15 minutes each for self-assembly. The self-assembly temperature is 60°C. After 50 cycles and vacuum drying at 80 °C for 8 h, an FTO electrode with a self-assembled Ni-MOFs film attached to the surf...

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Abstract

The invention relates to a preparation method of a self-assembly Ni-MOFs electrochromic QR code device. The method comprises the steps as follows: 1,4,5,8-naphthalenetetracarboxylic dianhydride and 5-amino-2-hydroxybenzoic acid are put in toluene, and an anhydride ligand is obtained; the ligand is dissolved in DMF and a solution A is obtained; nickel salt is dissolved in ethanol and a solution B is obtained; pretreated FTO glass is irradiated by ultraviolet ozone, the obtained FTO glass is sequentially placed in the solution A, ethanol, the solution B and ethanol for self-assembly, circulatingoperation is performed, and an FTO electrode with a Ni-MOFs film attached on the surface is obtained; a working electrode displaying QR code patterns is formed through laser etching, another FTO glass is used as a counter electrode, gel electrolyte is injected, and the device is obtained after packaging. Controllable preparation of the Ni-MOFs film is realized, the prepared QR code device can beswitched between display and hiding when positive and negative voltage is applied, and meanwhile, the device has good electrochromic performance and has wide application prospects in the fields of Internet of Things, intelligent wearable devices and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochromic devices, in particular to a method for preparing a self-assembled Ni-MOFs electrochromic two-dimensional code device. Background technique [0002] As one of the top ten technologies that detonated the Internet of Things pattern, the two-dimensional code is an application technology that uses a specific geometric figure to record data symbol information on black and white graphics distributed in a plane according to certain rules. The two-dimensional code uses a number of geometric shapes corresponding to binary 0 and 1 to express information in both horizontal and vertical directions at the same time, and expresses a large amount of information in a small area. It can be automatically read by image input equipment or photoelectric scanning equipment to achieve Information is processed automatically. However, once the two-dimensional code on the market is printed, it cannot be changed and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K9/02
CPCC08G83/008C09K9/02C09K2211/187
Inventor 王宏志李然李耀刚张青红侯成义
Owner DONGHUA UNIV
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