Self-powered photoelectrochemical enzyme-free glucose sensor and preparation method and detection method thereof

A glucose sensor and photoelectrochemical technology, which is applied in the fields of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of no enzyme-free photoelectrochemical glucose sensor, the difficulty of long-term immobilization of glucose oxidase, and the influence of glucose detection results. Achieve the effect of low detection signal background, low cost and low cost

Active Publication Date: 2022-08-09
HUBEI ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the glucose oxidase electrochemical sensor, which is widely studied, is limited by the physical and chemical properties of the enzyme, which makes it difficult for glucose oxidase to be fixed on the electrode for a long time, and is easily interfered by factors such as temperature and chemical environment. have an impact
In addition, although enzyme-free glucose sensors have attracted extensive research in recent years, most of these sensors are based on nanoparticles such as gold, platinum, copper, and their noble metal alloys, which have defects such as high cost, poor selectivity, and instability, and are not suitable for practical applications. Sample testing
[0004] Self-powered enzyme-free photoelectrochemical glucose sensor has not yet been reported

Method used

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  • Self-powered photoelectrochemical enzyme-free glucose sensor and preparation method and detection method thereof
  • Self-powered photoelectrochemical enzyme-free glucose sensor and preparation method and detection method thereof
  • Self-powered photoelectrochemical enzyme-free glucose sensor and preparation method and detection method thereof

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Embodiment 1

[0031] This embodiment discloses a Fe 2 O 3 The preparation method of nanorod array electrode comprises the following steps:

[0032] (1) Cut the FTO conductive glass into dimensions of width × length = 2 cm × 2.5 cm, first boil it in a sodium hydroxide solution with a mass concentration of 5%, and then use acetone, ethanol and ultrapure water in turn to conduct the FTO conductive glass. ultrasonic cleaning;

[0033] (2) Take 0.2mol L -1 FeCl 3 solution and 0.3mol L -1 NH 2 CONH 2 The solution was put into a beaker, the washed FTO conductive glass was placed in the beaker, the mouth of the beaker was sealed with plastic wrap, and then the beaker was placed in an oven at 100 °C for 4 hours, then gently taken out and rinsed with deionized water. After rinsing, it was put into a crucible, dried at room temperature, calcined at 500°C for 3h, and then annealed at 750°C for 10min. to produce Fe 2 O 3 nanorod array electrodes, the Fe 2 O 3 Raman spectroscopy was performed...

Embodiment 2

[0036] The present embodiment discloses a detection method for a self-powered enzyme-free glucose photoelectrochemical sensor, which includes taking Fe 2 O 3 The nanorod array electrode was used as the anode and the platinum wire was used as the cathode, and a two-electrode system was established. The two electrodes were inserted into a 1.0 mol / L NaOH solution containing a certain concentration of glucose, and connected to an electrochemical workstation; the glucose was irradiated under simulated sunlight. Oxidized, and the discharge power was recorded. Based on the glucose substrate concentration and power density, a calibration curve for glucose detection was obtained.

[0037] The electrochemical workstation selected in this embodiment is Shanghai Chenhua CHI660D.

[0038] The glucose concentrations were 0 mmol / L under the irradiation of simulated sunlight, respectively.

[0039] 0.2mmol / L, 0.4mmol / L, 0.6mmol / L, 0.8mmol / L, 1.0mmol / L, 1.2mmol / L, 1.4mmol / L, 1.6mmol / L, 1.8m...

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Abstract

The invention discloses a self-powered photoelectrochemical enzyme-free glucose sensor and a preparation method and detection method thereof, belonging to the technical field of sensors. It includes taking Fe 2 O 3 The electrode is the anode, the platinum wire or platinum sheet is the cathode, and a closed loop is formed through the electrolyte solution to detect the glucose concentration. The self-powered enzyme-free glucose photoelectrochemical sensor has a detection sensitivity of 3.53uW·cm for glucose with a concentration of 0-2.5mmol / L ‑2 ·mM ‑1 .

Description

technical field [0001] The invention relates to an enzyme-free glucose photoelectrochemical sensor, belonging to the technical field of photoelectrochemical sensors, in particular to a self-powered photoelectrochemical enzyme-free glucose sensor and a preparation method and detection method thereof. Background technique [0002] Quantitative analysis of glucose plays an extremely important role in clinical medicine, biochemistry, environmental monitoring, food science and other fields. The development of glucose sensors has always been the focus of the development of the sensor field. At present, glucose determination methods mainly include infrared spectroscopy, capillary electrophoresis, fluorescence spectroscopy, photoacoustic spectroscopy, colorimetry, surface plasmon resonance biosensors and electrochemiluminescence. However, these methods usually require more expensive equipment and more complicated sample processing, which is not conducive to popularization. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/327G01N27/416
CPCG01N27/3278G01N27/301G01N27/416
Inventor 张丙青何利华杨喆夏一夫刘海舒宏晖
Owner HUBEI ENG UNIV
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