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Preparation method of a photoelectrochemical dimeform sensor based on a supported double metal co-doped photosensitizer

A photoelectrochemical and co-doping technology, applied in the direction of electrochemical variables of materials, scientific instruments, instruments, etc., can solve the problems of low sensitivity of photoelectrochemical sensors, weakening of photoelectric signals, unfavorable practical applications, etc., and achieve broadening of the range of photosensitive wavelengths , save time, increase the effect of photocatalytic activity

Inactive Publication Date: 2019-03-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, the photogenerated electron-hole pairs of a single titanium dioxide nanomaterial are easy to recombine, which leads to the weakening of the photoelectric signal, and the poor conductivity of titanium dioxide also limits the sensitivity of photoelectrochemical sensors constructed from a single titanium dioxide nanomaterial. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 FeCo-TiO 2 / MoS 2 preparation of

[0043] (1) Add 0.6 g of molybdenum disulfide powder, 0.2 mmol of iron salt and 0.2 mmol of cobalt salt into 3 mL of n-butyllithium solution, and stir for 12 hours under nitrogen protection at 60 °C to obtain the reacted solution;

[0044] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 60 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain iron , Molybdenum disulfide nanomaterials co-intercalated with cobalt;

[0045] (3) Add 500 mg of molybdenum disulfide nanomaterials co-intercalated with iron and cobalt prepared in step (2) into 5 mL of tetrabutyl titanate, stir for 1 hour, then slowly add 0.5 mL of hydrofluoric acid while stirring acid, then reacted in a reactor at 160°C for 18 hours;

[0046] (4) The reaction product obtained in step (3) was centrifuged and washed three times with ultra...

Embodiment 2

[0052] Example 2 FeCo-TiO 2 / MoS 2 preparation of

[0053] (1) Add 0.6 g of molybdenum disulfide powder, 1.0 mmol of iron salt and 1.0 mmol of cobalt salt into 5 mL of n-butyllithium solution, and stir for 24 hours under nitrogen protection at 30 °C to obtain the reacted solution;

[0054] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 30 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain iron , Molybdenum disulfide nanomaterials co-intercalated with cobalt;

[0055] (3) Add 200 mg of molybdenum disulfide nanomaterials co-intercalated with iron and cobalt prepared in step (2) into 5 mL of tetrabutyl titanate, stir for 1 hour, then slowly add 0.6 mL of hydrofluoric acid while stirring acid, then reacted in a reactor at 180°C for 20 hours;

[0056] (4) The reaction product obtained in step (3) was centrifuged and washed three times with ultra...

Embodiment 3

[0062] Example 3 Preparation method of photoelectrochemical dimeform sensor

[0063] (1) Use ITO conductive glass with a width of 1 cm and a length of 4 cm as the working electrode, and drop-coat 8 µL of FeCo-TiO on the surface of the electrode 2 / MoS 2 Sol, dry at room temperature;

[0064] (2) Wash the electrode obtained in step (1) with buffer solution PBS, continue to drop-coat 8 µL of 10 µg / mL chlordimeform antibody solution on the surface of the electrode, and store it in a refrigerator at 4 °C to dry;

[0065] (3) Wash the electrode obtained in step (2) with PBS, continue to drip-coat 8 µL of bovine serum albumin solution with a concentration of 100 µg / mL on the surface of the electrode, and store it in a refrigerator at 4 °C to dry;

[0066] (4) Wash the electrode obtained in step (3) with PBS, continue to drip-coat 6 µL of alkaline phosphatase solution with a concentration of 20 µg / mL on the surface of the electrode, and store it in a refrigerator at 4 °C to dry;

...

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Abstract

The invention discloses a preparation method of a photoelectrochemical dimeform sensor. It belongs to the technical field of new nanometer functional materials and biosensors. The present invention firstly prepares a novel load-type bimetallic co-doped photosensitizer, that is, FeCoTiO2 / MoS2, a two-dimensional nanocomposite material FeCoTiO2 / MoS2 in situ compounded by iron and cobalt codoped titanium dioxide nano-squares and molybdenum disulfide. Good biocompatibility and large specific surface area, loaded with dimeform antibody, immobilized with alkaline phosphatase, during detection, because alkaline phosphatase can catalyze L-ascorbic acid-2-phosphate trisodium salt AAP L-ascorbic acid AA is generated in situ, and then provides an electron donor for photoelectric detection, and then uses the effect of the specific quantitative binding of antibody and antigen on the electron transport ability, so that the photocurrent intensity is correspondingly reduced, and finally realizes the use of label-free photoelectric detection. Construction of a photoelectric sensor for the chemical detection of dimeform.

Description

technical field [0001] The invention relates to a preparation method of a photoelectrochemical dimeform sensor. It belongs to the technical field of new nanometer functional materials and biosensors. Background technique [0002] Dimeform is a kind of pesticide. In the soil, dimeform can migrate slightly to the deep layer of the soil through the leaching of water. Animals with chronic poisoning of dimeform may experience weight loss, hematocrit, hemoglobin and red blood cell count decrease, white blood cell count increase, etc. According to a 1972 WHO report, long-term exposure to chlordimeform can lead to cancer. [0003] At present, the methods for detecting dimeform mainly include chromatography and mass spectrometry. Such methods require expensive instruments and complex operations, and laboratory personnel need professional training before they can perform detection. Therefore, it is of great significance to develop a chlordimeform sensor with low cost, fast detectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/327G01N33/543
CPCG01N27/305G01N27/3278G01N33/54386G01N2430/10
Inventor 张勇吴丹李贺任祥魏琴
Owner UNIV OF JINAN
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