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A kind of ferric ion photoelectric sensor and preparation method thereof based on ito

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., and achieve good electrochemical detection performance, high sensitivity and rapid analysis. Effect

Active Publication Date: 2022-04-26
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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  • A kind of ferric ion photoelectric sensor and preparation method thereof based on ito
  • A kind of ferric ion photoelectric sensor and preparation method thereof based on ito
  • A kind of ferric ion photoelectric sensor and preparation method thereof based on ito

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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 ITO-based iron ion photoelectric sensor and a preparation method thereof, belonging to the technical field of metal ion detection. The ferric ion photoelectric sensor of the invention comprises two parts, a modified fluorescent material and an ITO substrate. By modifying ITO, 4-methylumbelliferone and chitosan-modified fluorescein isothiocyanate materials are cured on the surface of ITO to construct a "one-body dual-purpose" iron ion with both fluorescent and electrochemical properties sensor. Combining the visualization of fluorescence analysis and the advantages of sensitive and rapid electrochemical analysis, the fluorescence characteristics of the electrode are used to realize the visual determination of the concentration of iron ions in water. The results showed that the sensor for Fe 3+ Selective fluorescent recognition at 10‑ 1 ~10- 7 Within the range, the concentration of iron can be judged visually. Fe ion photoelectric sensor of the present invention is to Fe 3+ It also showed good electrochemical detection performance, and the Fe 3+ The detection limit can be as low as 5nM.

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 Patents(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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