Construction method of photoelectric chemical sensor for detection of reduced glutathione

A glutathione and photoelectrochemical technology, which is applied in the field of photoelectrochemical sensor construction, can solve problems affecting photoelectrochemical detection sensitivity, and achieve the effects of improving detection sensitivity, wide linear range, and low detection limit

Inactive Publication Date: 2013-10-23
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single semiconductor is easy to recombine with photogenerated electron pairs, which inhibits the generation of photoelectric signals and further affects the sensitivity of photoelectrochemical detection.
Moreover, cadmium-based semiconductors are non-environmentally friendly substances

Method used

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  • Construction method of photoelectric chemical sensor for detection of reduced glutathione
  • Construction method of photoelectric chemical sensor for detection of reduced glutathione
  • Construction method of photoelectric chemical sensor for detection of reduced glutathione

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: A method for constructing a photoelectrochemical sensor for the detection of reduced glutathione, comprising the steps of:

[0018] (1) The ITO conductive glass is 1 cm × 4 cm unit size, with 1 mol L -1 Ultrasonic cleaning with sodium hydroxide and 5% hydrogen peroxide for 30 minutes, followed by immersion washing and rinsing with ethanol, acetone and pure water, and drying in the air.

[0019] The ITO conductive glass was used as the working electrode, the silver / silver chloride was used as the reference electrode, and the platinum wire was used as the counter electrode, and the three electrodes were inserted into a solution containing 5 mmol L -1 Zn(NO 3 ) 2 · 6H 2 O solution was deposited at 80°C for 20 minutes, and the deposition potential was -1.0V. After the reaction, a layer of dense white substance nano-zinc oxide was formed on the surface of ITO conductive glass, forming a nano-zinc oxide photoanode. See figure 1 (A), X-ray diffraction patter...

Embodiment 2

[0024] Example 2: Construction method of photoelectrochemical sensor for the detection of reduced glutathione:

[0025] Firstly, a cuprous oxide / zinc oxide heterojunction was electrosynthesized using the three-electrode system of an electrochemical workstation. -1 Ultrasonic cleaning with sodium hydroxide and 5% hydrogen peroxide for 30 minutes, followed by immersion washing and rinsing with ethanol, acetone and pure water, and drying in the air. ITO conductive glass was used as the working electrode (Φ 5.0), silver / silver chloride was used as the reference electrode, and platinum wire was used as the counter electrode. Insert the three electrodes containing 5 mmol L -1 Zn(NO 3 ) 2 · 6H 2 The O solution was deposited at 70 °C for 20 min with a deposition potential of −1.1 V. After the reaction, it was found that a layer of dense white substance was formed on the surface of ITO, which was characterized as nano-zinc oxide. The mother liquor on the surface of the nano-zi...

Embodiment 3

[0027] Example 3: Construction method of photoelectrochemical sensor for the detection of reduced glutathione:

[0028] Firstly, a cuprous oxide / zinc oxide heterojunction was electrosynthesized using the three-electrode system of an electrochemical workstation. -1 Ultrasonic cleaning with sodium hydroxide and 5% hydrogen peroxide for 30 minutes, followed by immersion washing and rinsing with ethanol, acetone and pure water, and drying in the air. ITO conductive glass was used as the working electrode (Φ 5.0), silver / silver chloride was used as the reference electrode, and platinum wire was used as the counter electrode. Insert the three electrodes containing 5 mmol L -1 Zn(NO 3 ) 2 · 6H 2 The O solution was deposited at 60 °C for 40 min with a deposition potential of −0.9 V. After the reaction, it was found that a layer of dense white substance was formed on the surface of ITO, which was characterized as nano-zinc oxide. The mother liquor on the surface of the nano-zi...

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Abstract

The invention discloses a construction method of a photoelectric chemical sensor for detection of reduced glutathione. The construction method is characterized by comprising the following steps: (1) a nano-zinc oxide photo-anode is prepared with ITO conductive glass as a working electrode, silver / silver chloride as a reference electrode and a platinum wire as a counter electrode; and (2) a cuprous oxide / zinc oxide heterojunction-based photo-anode. Through construction of the cuprous oxide / zinc oxide heterojunction-based photo-anode, the generated photoelectric current is raised by 77.3% than a photoelectric current generated from a zinc oxide photo-anode, which shows that the construction method can promote separation of carrier pairs effectively, and therefore the detection sensitivity is raised.

Description

technical field [0001] The invention relates to a construction method of a photoelectrochemical sensor for detecting reduced glutathione, belonging to the field of instrument analysis and testing. Background technique [0002] Photoelectrochemical detection is a novel test method, which is based on the separation of electron-hole pairs caused by light-excited photobeacons, and realizes the rapid transfer of electrons on analytes, semiconductors and electrodes under suitable bias potential conditions. Thus, a photocurrent is formed, and the presence of the analyte can quantitatively affect the change of the photocurrent, thereby realizing the photoelectrochemical detection of the analyte. As far as photoelectric beacons are concerned, the current design system is mainly based on a single semiconductor, such as: nano-titanium dioxide, cadmium sulfide, cadmium selenide, cadmium telluride, ruthenium pyridine, polythiophene derivatives, etc. However, a single semiconductor is ea...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30G01N27/38
Inventor 李红波李静王伟高雷李威
Owner YANCHENG INST OF TECH
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