Preparation method of Fe2O3 thin film electrode and application of Fe2O3 thin film electrode to photoelectric chemical glucose sensor

A thin-film electrode, photoelectrochemical technology, which is applied in the fields of material electrochemical variables, scientific instruments, liquid chemical plating, etc., can solve the problems of poor selectivity, low sensitivity, and long response time, and achieve short response time, simple process, and sensitivity improved effect

Active Publication Date: 2019-05-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although a large number of photoactive materials have been reported one after another, there are still problems in photoelectrochemical biosensors, such as low sensitivity, poor selectivity, long response time, etc.

Method used

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  • Preparation method of Fe2O3 thin film electrode and application of Fe2O3 thin film electrode to photoelectric chemical glucose sensor
  • Preparation method of Fe2O3 thin film electrode and application of Fe2O3 thin film electrode to photoelectric chemical glucose sensor
  • Preparation method of Fe2O3 thin film electrode and application of Fe2O3 thin film electrode to photoelectric chemical glucose sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Fe 2 o 3 Film preparation

[0039] A certain amount of Fe(NO 3 ) 3 9H 2 O was added to 15 mL of absolute ethanol to prepare precursor solutions with concentrations of 40 mM, 60 mM, 80 mM and 100 mM, respectively, and stirred at room temperature to dissolve completely. Then the solution is spin-coated on the cleaned FTO conductive glass (respectively in acetone, ethanol, deionized water, ultrasonic cleaning for 15min, and drying for later use), the spin-coating speed is 1000rpm, the time is 20s, and then respectively at 150°C and 350°C Treated for 10min, after spin coating, calcined at 600°C in the air for 4h, the obtained sample film was ferric oxide (Fe 2 o 3 ).

Embodiment 2

[0040] Example 2: Fe 2 o 3 Photoelectrochemical testing of thin films

[0041] The test is carried out on a CHI660E electrochemical workstation and a three-electrode system. The reference electrode is an Ag / AgCl (saturated KCl) electrode, the counter electrode is a platinum sheet electrode, and the working electrode is Fe prepared in Example 1 of the present invention. 2 o 3 Thin film, with 1M NaOH aqueous solution as electrolyte. According to the preparation of Fe at different concentrations and layers 2 o 3 According to the It curve of the thin film, the thin film obtained by spin-coating 6 layers has the best photoelectric response performance at 60mM, such as figure 1 (a). figure 1 (b) is the Fe with the highest photocurrent at different concentrations 2 o 3 The I-t curve of the thin film, which is measured at a voltage of 0.3V (vs. Ag / AgCl).

[0042] Depend on figure 2 The X-ray diffraction pattern of (a) shows that the obtained film is Fe 2 o 3 film. figur...

Embodiment 3

[0043] Example 3: Fe 2 o 3 Thin film preparation of non-enzyme-based glucose photoelectrochemical sensor and its performance test

[0044] The detection experiment was carried out on a CHI660E electrochemical workstation and a three-electrode system. The reference electrode was an Ag / AgCl (saturated KCl) electrode, the counter electrode was a platinum sheet electrode, and the working electrode was Fe prepared in Example 1 of the present invention. 2 o 3 film. Under optimized conditions, with 1M NaOH solution as the electrolyte, 2mM glucose was added to obtain an It curve at 0.2Vvs.Ag / AgCl, such as Figure 4 (a), available 60mM-6C Fe 2 o 3 The response of the film to glucose is the best, and the response time is short Figure 4 b). Figure 5 (a) is obtained according to the It curve of adding different concentrations of glucose (0mM-14mM), showing a very good linear relationship in the concentration range of 1mM-8mM. In addition, during the selective test, a variety of i...

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Abstract

The invention discloses a preparation method of a Fe2O3 thin film electrode and application of the Fe2O3 thin film electrode to a photoelectric chemical glucose sensor. The preparation method comprises the steps that ferric nitrate is dissolved in ethanol to obtain an iron source liquid precursor; the surface of a conductive substrate is rotatably coated with the iron source liquid precursor to obtain a thin film precursor; and in the rotatably coating process, the number of layers of rotatably coating is at least one layer, the layers are firstly heated to 145-155 DEG C after each layer of rotatably coating, and then are heated to 345-355 DEG C to treat, and the thin film precursor is sintered to obtain the Fe2O3 thin film electrode. The Fe2O3 thin film electrode prepared by the preparation method is directly assembled into the photoelectric chemical sensor for detecting glucose, and has the advantages of good selectivity and quick response. In addition, the preparation method is simple and has no pollution, the preparation process of the glucose photoelectric chemical sensor is simple, and a high commercial application prospect is achieved.

Description

technical field [0001] The invention belongs to the field of photoelectrochemical sensors, in particular to a Fe 2 o 3 Preparation method of thin film electrode and its application in photoelectrochemical glucose sensor. Background technique [0002] The statements herein merely provide background information related to the present invention and may not necessarily constitute prior art. [0003] Diabetes is a worldwide frequently-occurring and common disease. In severe cases, it can cause damage to the eyes, kidneys, heart and nerves, seriously threatening human health and affecting people's daily life and work. It has become second only to cardiovascular disease, Cancer is the third most dangerous disease. Therefore, in order to prevent diabetes and the complications it causes, it is very important to be able to detect the blood glucose concentration quickly and accurately. [0004] Compared with traditional detection methods, photoelectrochemical analysis methods have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327G01N27/26C23C18/12
Inventor 张倩倩刘福燕黄柏标王朋张晓阳秦晓燕王泽岩郑昭科刘媛媛
Owner SHANDONG UNIV
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