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A kind of glucose photoelectrochemical sensor and its preparation method and application

A photoelectrochemical and glucose technology, applied in the field of glucose detection, can solve the problems of loss of catalytic activity, high price, structural changes, etc., and achieve the effect of simple preparation method, low cost and high environmental tolerance

Active Publication Date: 2020-10-23
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, natural enzymes are prone to structural changes and lose catalytic activity under non-physiological conditions such as heat, acid, and alkali, and are expensive

Method used

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  • A kind of glucose photoelectrochemical sensor and its preparation method and application
  • A kind of glucose photoelectrochemical sensor and its preparation method and application
  • A kind of glucose photoelectrochemical sensor and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1, the preparation of glucose photoelectrochemical sensor

[0040] Preparation of lead sulfide quantum dots: Dissolve 0.16mmol of lead acetate in 50mL of ultrapure water, deoxygenate by nitrogen for 30min; into, and adjust the pH of the solution with 1mol / L NaOH to be 11.0±0.5; add 0.015mol / L NaOH 2 4 mL of S solution was slowly added into the solution, and the solution immediately changed from colorless to brown, and the reaction mixture was stirred for 3 h under a nitrogen atmosphere to obtain a lead sulfide solution, which was finally stored in a refrigerator at 4 °C. figure 1 It is a transmission electron microscope picture of the synthesized lead sulfide quantum dots, and the obtained lead sulfide quantum dots have a particle size of 3-7 nm.

[0041] Synthesis of silica: add 1mL tetraethyl orthosilicate (TEOS) to a mixture of 35.7mL ethanol, 5mL water and 0.8mL ammonia water, stir at 30°C for 24h, wash the product with water and ethanol; then disperse i...

Embodiment 2

[0055] Embodiment 2, the photoelectrochemical sensor detects the glucose sample

[0056] The method for detecting the glucose sample by the photoelectrochemical sensor comprises the following steps:

[0057] 1. In the buffer solution, the glucose photoelectrochemical sensor was used as the working electrode, the platinum wire electrode was used as the auxiliary electrode, and the saturated calomel electrode was used as the reference electrode. Oxygen was introduced for 5 minutes. By controlling the irradiation and closing of the excitation light source, the determination The electrochemical signal of the working electrode was used to obtain the photocurrent value. Wherein, the buffer solution is tris-HCl solution (Tris-HCl), the concentration of the tris solution is 0.01-0.2mol / L, and the pH of the tris solution is 7.0-7.4; The excitation light source is an LED lamp, and the center wavelength of the LED lamp is 400-500nm.

[0058] 2. Adding the glucose sample solution into t...

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Abstract

The invention discloses a glucose photo-electrochemical sensor as well as a preparation method and application thereof, and belongs to the technical field of glucose detection. The preparation methodof the glucose photo-electrochemical sensor comprises the following steps: (1) modifying semiconductor quantum dots on a substrate by self-assembly, the substrate being conductive glass, the semiconductor quantum dots being lead sulfide quantum dots; (2) dripping a nano silica solution onto the semiconductor quantum dot modified substrate obtained in step (1), and drying to obtain a composite filmmodified substrate; and (3) dripping a gold nanoparticle solution onto the composite film modified substrate, and drying to obtain the glucose photo-electrochemical sensor. The glucose photo-electrochemical sensor is low in cost, easy to prepare and high in detection sensitivity, and can be prepared in large scale.

Description

technical field [0001] The invention relates to the technical field of glucose detection, in particular to a glucose photoelectrochemical sensor and its preparation method and application. Background technique [0002] Photoelectrochemistry is an emerging discipline developed on the basis of electrochemistry. Its basic principle is: the photoelectric conversion material on the surface of the electrode is excited under the condition of light, and transitions from the ground state to the excited state, thereby generating electron-hole pairs. The effective separation of electrons and holes is realized, and a photovoltage is generated to form a photocurrent in an external circuit. The enhancement of the photocurrent can be induced when a suitable electron donor / acceptor (photoelectrically active species) is present in the solution. Therefore, using the interaction between the analyte and the photoelectric active substance, the photoelectrochemical measurement can be performed a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327
CPCG01N27/3278
Inventor 狄俊伟曹玲王建文
Owner SUZHOU UNIV
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