Iron ion photoelectric sensor taking ITO as substrate and preparation method of iron ion photoelectric sensor

A photoelectric sensor, iron ion technology, used in instruments, scientific instruments, fluorescence/phosphorescence, etc., can solve the problems of slow detection speed, high detection cost, insufficient convenience, etc., to achieve high sensitivity and rapid analysis, good electrochemical detection performance Effect

Active Publication Date: 2021-08-24
LINYI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing detection methods all have the problems of slow detection speed, low sensitivity at low concentrations, high detection cost, and insufficient convenience.

Method used

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  • Iron ion photoelectric sensor taking ITO as substrate and preparation method of iron ion photoelectric sensor
  • Iron ion photoelectric sensor taking ITO as substrate and preparation method of iron ion photoelectric sensor
  • Iron ion photoelectric sensor taking ITO as substrate and preparation method of iron ion photoelectric sensor

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Embodiment 1

[0031] An ITO-based ferric ion photoelectric sensor comprises a modified fluorescent material and an ITO substrate.

[0032] The specific preparation method is:

[0033] The fluorescent material used in the experiment was fluorescein isothiocyanate (FITC), and a FITC solution with a concentration of 0.1 mg / ml was prepared. Prepare 5mg / mL chitosan solution with 1% acetic acid as solvent, take 10ml of 5mg / ml chitosan solution, add 10mL absolute ethanol, stir and mix. Add 10ml of 0.1mg / mL FITC to the mixed solution, add 0.0473g of 4-methylumbelliferone, and stir at room temperature for 5h in the dark. Adjust the pH to 9-10 with 0.2mol / L NaOH, centrifuge for 15 minutes to obtain a precipitate, and dissolve it with 1% acetic acid to obtain 4-MU modified FITC fluorescein (4MU-Chi-FITC).

[0034] The curing process of fluorescent materials on the surface of ITO:

[0035] After the 4MU-Chi-FITC fluorescent solution is dripped on the ITO, spray 0.8g / L sodium alginate solution twice ...

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Abstract

The invention discloses an iron ion photoelectric sensor with ITO as a substrate and a preparation method of the iron ion photoelectric sensor, and belongs to the technical field of metal ion detection. The iron ion photoelectric sensor comprises a modified fluorescent material and an ITO substrate. According to the invention, ITO is modified, and a 4-methylumbelliferone and chitosan modified fluorescein isothiocyanate material is cured on the surface of ITO, such that the integrated dual-purpose iron ion sensor with fluorescence performance and electrochemical performance is constructed. The advantages of visualization of fluorescence analysis and sensitivity and rapidness of electrochemical analysis are combined, and the fluorescence characteristic of an electrode is utilized to realize the visual concentration determination of the iron ions in a water body. Results show that the sensor has a selective fluorescence recognition effect on Fe < 3+>, and the concentration of iron can be visually judged within a range of 10 <-1> to 10 <-7>. The Fe ion photoelectric sensor disclosed by the invention also shows better electrochemical detection performance on Fe <3+>, and the detection limit on Fe < 3+> can be as low as 5 nM.

Description

technical field [0001] The invention belongs to the technical field of metal ion detection, and in particular relates to an ITO-based iron ion photoelectric sensor and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of agriculture and industrialization, the eutrophication of water body has been intensified, and the frequency and magnitude of algae bloom events have gradually increased. Most of the algae that cause algae blooms will produce toxic algal toxins. Algal blooms can cause serious harm to ecosystems and human health by producing toxins and changing the physical and chemical characteristics of water bodies. The macroelements N and P are the main control factors of water eutrophication, they affect the process of water eutrophication and then affect the reproduction rate of algae. With the introduction of the "iron limitation" theory, the relationship between trace element iron and algae proliferation has also b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N27/30
CPCG01N21/6428G01N21/643G01N27/30G01N2021/6432
Inventor 胡雪萍白振钰宋兴良刘昊
Owner LINYI UNIVERSITY
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