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Photoelectrochemical optical fiber microelectrode adopting electrode internal illumination mode and preparation method of photoelectrochemical optical fiber microelectrode

A photoelectrochemical and microelectrode technology, applied in the fields of photoelectrochemistry and analytical chemistry, can solve the problems of large size and limited wavelength of light source, and achieve the effect of simple operation and significant photoelectric signal

Active Publication Date: 2021-09-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is used to solve the problem that the traditional photoelectrode in the field of photoelectrochemistry (PEC) has a large size and the wavelength of the light source is limited in some application scenarios.

Method used

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  • Photoelectrochemical optical fiber microelectrode adopting electrode internal illumination mode and preparation method of photoelectrochemical optical fiber microelectrode
  • Photoelectrochemical optical fiber microelectrode adopting electrode internal illumination mode and preparation method of photoelectrochemical optical fiber microelectrode
  • Photoelectrochemical optical fiber microelectrode adopting electrode internal illumination mode and preparation method of photoelectrochemical optical fiber microelectrode

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Polishing of optical fiber:

[0041] Commercially available plastic optical fiber with a diameter of 1.0 mm, transparent and colorless, the core material is modified polymethylmethacrylate (PMMA), the cladding material is oxygen resin, the minimum bending radius is 10 times the fiber diameter, and the length of white light transmission 25~30 m, the fiber specification tolerance is 6% of the diameter. Cut the optical fiber into small sections of 9-10 cm, and use sandpaper to polish one end of the small optical fiber section at 360 degrees to obtain a frosted surface with a length of about 1.0 cm. Finally, the polished optical fiber was ultrasonically cleaned with ethanol and ultrapure water in sequence.

[0042] Preparation of optical fiber conductive film:

[0043] A conductive film is plated on the polished optical fiber by DC sputtering. The conductive film material is indium tin oxide (ITO), and the coating adopts the JCP-350M3 coating machine of Beijing Techno Te...

Embodiment 2

[0051] The steps of polishing the optical fiber and preparing the conductive film of the optical fiber are the same as those in Example 1.

[0052] Preparation of optical fiber photoelectric material layer: In this case, titanium dioxide (TiO 2 ) as an example of optoelectronic materials. Preparation by dipping method: disperse the pre-prepared semiconductor nanoparticles with a solvent. Commercially available TiO with a particle size of about 20 nm was selected 2 Nanoparticles are used as photoelectric materials, and a dispersion solution with a concentration of 1.0 mg / mL is prepared with ultrapure water, and the dispersion solution is dipped in the frosted end of an optical fiber and dried at 37 °C. This process was repeated 3 times. That is, TiO is loaded on the conductive fiber 2 nano layer.

[0053] TiO in case 2 It can be replaced with other semiconductor materials, and the corresponding experimental parameters can be changed accordingly. A fiber optic electrode w...

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Abstract

The invention discloses a preparation method of a photoelectrochemical optical fiber microelectrode adopting an electrode internal illumination mode, and the structure of the optical fiber electrode with the photoelectric property is designed into three layers, namely an optical fiber inner layer, a conductive film layer and a photoelectric material layer from inside to outside in sequence. Wherein the optical fiber is a plastic optical fiber with good toughness, and the diameter of the optical fiber is less than 1.0 mm. The material of the conductive layer meets the conditions of being colorless, transparent and good in conductivity, and provides conductivity for the optical fiber. Compared with a traditional photoelectrode, the photoelectric property optical fiber electrode disclosed by the invention has the advantages that the size is very small, and the photoelectric property optical fiber electrode still has good photoelectric response. In addition, the creative transformation of the optical excitation mode of the photoelectrode material is achieved, and external light source excitation is transformed into optical fiber internal light source excitation. According to the new mode using the internal light source, the limitation of an application scene on the PEC illumination wavelength is well avoided, and the selection range of a photoelectric material is expanded. The technology is expected to be applied to the fields of in-situ detection of organisms, continuous monitoring of environmental samples and the like.

Description

technical field [0001] The invention belongs to the fields of photoelectrochemistry and analytical chemistry, and specifically relates to a photoelectrochemical optical fiber microelectrode using an internal illumination mode of the electrode and a preparation method thereof, so as to solve the problem that the traditional photoelectrode has a large size and the wavelength of a light source is limited in some application scenarios. Background technique [0002] Photoelectrochemistry (PEC) refers to the discipline in which light is absorbed by metal or semiconductor electrode materials under the irradiation of light to promote electrode reactions. It is reflected in the conversion of light energy, electrical energy and chemical energy. Among them, the PEC sensing technology built with photoelectric active materials is increasingly used in the detection of substances in biological samples and environmental samples. This technology has high sensitivity, easy miniaturization, l...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/327G01N27/416
CPCG01N27/30G01N27/327G01N27/416Y02P70/50
Inventor 林振宇王馨阳王建邱彬罗芳
Owner FUZHOU UNIV
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