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An ion sensor for visually detecting thiocyanate based on color change, its preparation method and application

An ion sensor, thiocyanate technology, applied in the measurement of color/spectral properties, analysis by chemical reaction of materials, material analysis by observing the effect on chemical indicators, etc., can solve the problem of long detection time and complex preparation. Process detection methods, secondary pollution and other problems, to achieve the effects of low production cost, good anti-interference, and mild conditions

Active Publication Date: 2021-03-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, all these methods require complex and expensive instruments or cumbersome preparation processes, and some detection methods take a long time to detect and use toxic substances, which may also cause secondary pollution

Method used

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  • An ion sensor for visually detecting thiocyanate based on color change, its preparation method and application
  • An ion sensor for visually detecting thiocyanate based on color change, its preparation method and application
  • An ion sensor for visually detecting thiocyanate based on color change, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation of the ion sensor based on the plasmon resonance metal layer 2 of the continuous metal layer is carried out according to the following process steps:

[0043] (1) A continuous silver layer (Ag layer) with a thickness of 24nm is evaporated on the glass substrate by vacuum evaporation method (Vacuum evaporator);

[0044] (2) grafting initiator 2-(2-bromoisobutyryloxy) undecyl mercaptan on the deposited silver layer;

[0045] (3) Add 1.0 g monomeric methacryloyloxyethyltrimethylammonium chloride solution (75 wt%) and 160 μL ligand pentamethyldiethylenetriamine to the test tube, then add methanol and deionized 3.7mL each of water, and argon for 30min;

[0046] (4) A copper plate is set on the glass substrate, and the glass substrate is put into a test tube with ligand and monomer, and the copper plate is used as a catalyst, and reacted for 20min at room temperature to form PMETAC molecules on the silver layer Brush and take it out; soak the glass substrate...

Embodiment 2

[0050] The preparation of the ion sensor based on the plasmon resonance metal layer 2 of the triangular structure is carried out according to the following process steps:

[0051] (1) A continuous silver layer (Ag layer) with a thickness of 30nm is deposited on the glass substrate by vacuum evaporation method (Vacuum evaporator);

[0052] (2) grafting initiator 2-(2-bromoisobutyryloxy) undecyl mercaptan on the deposited silver layer;

[0053] (3) Add 1.2 g monomeric methacryloyloxyethyltrimethylammonium chloride solution (75 wt%) and 160 μL ligand pentamethyldiethylenetriamine to the test tube, then add methanol and deionized Each 4mL of water, blown with argon for 30min;

[0054] (4) A copper plate is set on the glass substrate, the glass substrate is placed in a test tube with ligand and monomer, and the copper plate is used as a catalyst to react for 30min at room temperature to form PMETAC molecules on the silver layer Brush and take it out; soak the glass substrate in a...

Embodiment 3

[0058] The test of the working transmission spectrogram of the ion sensor of embodiment 1 is carried out according to the following process steps:

[0059] (1) Prepare deionized water and configure different concentrations of thiocyanate solutions, the concentrations are 0.005M, 0.01M, 0.02M, 0.03M, 0.05M 0.07M, 0.1M, 0.2M, 0.3M.

[0060] (2) Soak the ion sensor in deionized water until the surface color of the ion sensor does not change, then take out the ion sensor.

[0061] (3) Soak the ion sensor soaked in deionized water in sequence in different concentrations of thiocyanate solution, the soaking sequence is from low concentration to high concentration; the soaking time is until the surface color of the ion sensor no longer changes.

[0062] (4) Use deionized water to gently rinse the ion sensor soaked in the thiocyanate solution, then soak the ion sensor in deionized water to make it swell to the maximum, and use a fiber optic spectrometer to test its transmission spectr...

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Abstract

The invention belongs to the technical field of metal materials, and specifically relates to an ion sensor for detecting thiocyanate with the naked eye based on color changes and its preparation method and application. The technical solution of the present invention is as follows: an ion sensor that detects thiocyanate with the naked eye based on color changes, including a plasma resonance metal layer one, a PMETAC molecular brush and a plasma resonance metal layer two, the plasma resonance metal layer one and plasma The second resonance metal layer is arranged on both sides of the PMETAC molecular brush to form a MIM resonator; the components of the plasmon resonance metal layer 1 and the plasmon resonance metal layer 2 are gold, silver, platinum or aluminum. The invention provides an ion sensor for detecting thiocyanate with the naked eye based on color changes and its preparation method and application. It is capable of label-free testing, and the testing method is convenient and economical, has a good reusability rate, good anti-interference performance, and short response time. Suitable for real-time detection.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to an ion sensor capable of visually detecting thiocyanate based on color changes, a preparation method and application thereof. Background technique [0002] Sodium thiocyanate (NaSCN) is a white orthorhombic crystal or powder, soluble in water, ethanol and acetone. Sodium thiocyanate can be used as a polyacrylonitrile fiber spinning solvent, chemical analysis reagent, color film film flushing agent, certain plant defoliants, and airport road herbicides, and is also used in pharmaceuticals, printing and dyeing, rubber processing, black Nickel plating and the manufacture of artificial mustard oil and some organic synthesis. However, sodium thiocyanate is a toxic product, and a small amount of ingestion will cause great harm to the human body. The toxicity of sodium thiocyanate is mainly caused by the cyanide ion released in the body. SCN due to cyanide metaboli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/25
CPCG01N21/25G01N21/78G01N2021/7756G01N2021/7783
Inventor 王铁强吕金秋付昱陈丹
Owner NORTHEASTERN UNIV LIAONING
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