Preparation method of self-powered sensor

A sensor and self-powered technology, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of changing the photoelectrochemical properties of the photoelectrode interface and affecting the performance of photoelectrochemical sensors, and achieve excellent multi-functional applications, excellent photoelectric response, and improved The effect of response strength

Inactive Publication Date: 2021-08-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional design of photoelectrochemical sensors is based on the photoactive substrate material as the signal source and the biorecognition platform, but this design gradually has some shortcomings. On the one hand, the side reaction between the photoelectrode and the reducing substance in the actual sample will change the photoelectrode interface. Photoelectrochemical properties
On the other hand, the interaction between photoelectrodes and biomolecules can also affect the performance of photoelectrochemical sensors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 A method for preparing a self-powered sensor, characterized in that it comprises the following steps:

[0042] (1) WO 3 Preparation of hollow spheres

[0043] Take 0.5 g of sodium tungstate hydrate in 30 mL of ultrapure water, stir until dissolved, add 0.8 mL of L-lactic acid, stir for 15 min, add 1.35 mL of 6 mol / L HCl, stir for 40 min, and transfer the resulting solution to a high pressure reaction Reactor at 120 °C for 10 min. After the autoclave was gradually cooled to room temperature, the product was taken out, washed 3 times with ultrapure water, dried in vacuum overnight, and the resulting powder was calcined at 500 °C in a muffle furnace for 2 h, that is, the prepared WO 3 hollow ball;

[0044] (2)In 2 S 3 preparation of

[0045] Dissolve 0.2 g of indium nitrate hydrate in 80 mL of ultrapure water, add 0.10 g of thioacetamide to the above solution, stir for 30 min, transfer the resulting solution to an autoclave, and react at 120 °C for 10 h....

Embodiment 2

[0061] Embodiment 2 A method for preparing a self-powered sensor, characterized in that it comprises the following steps:

[0062] (1) WO 3 Preparation of hollow spheres

[0063] Take 0.6 g of sodium tungstate hydrate in 30 mL of ultrapure water, stir until dissolved, add 0.9 mL of L-lactic acid, stir for 18 min, add 1.35 mL of 6 mol / L HCL, stir for 40 min, then transfer the resulting solution to a high-pressure reaction kettle, reacted at 120 °C for 11 min, after the autoclave was gradually cooled to room temperature, the product was taken out, washed 3 times with ultrapure water, dried in vacuum overnight, and the resulting powder was calcined at 500 °C in a muffle furnace for 2 h, that is, the prepared WO 3 hollow ball;

[0064] (2)In 2 S 3 preparation of

[0065] Dissolve 0.3 g of indium nitrate hydrate in 80 mL of ultrapure water, add 0.11 g of thioacetamide to the above solution, stir for 30 min, transfer the resulting solution to an autoclave, react at 120 °C for ...

Embodiment 3

[0081] Embodiment 3 A method for preparing a self-powered sensor, characterized in that it comprises the following steps:

[0082] (1) WO 3 Preparation of hollow spheres

[0083] Take 0.7 g of sodium tungstate hydrate in 30 mL of ultrapure water, stir until dissolved, add 1.0 mL of L-lactic acid, stir for 20 minutes, add 1.35 mL of 6 mol / L HCL, stir for 40 minutes, and transfer the resulting solution to a high pressure reaction kettle, reacted at 120 °C for 12 min, after the autoclave was gradually cooled to room temperature, the product was taken out, washed 4 times with ultrapure water, dried in vacuum overnight, and the resulting powder was calcined at 500 °C in a muffle furnace for 3 h, that is, the prepared WO 3 hollow ball;

[0084] (2)In 2 S 3 preparation of

[0085] Dissolve 0.5 g of indium nitrate hydrate in 80 mL of ultrapure water, add 0.10–0.12 g of thioacetamide to the above solution, stir for 30 min, transfer the resulting solution to a high-pressure reacto...

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Abstract

The invention relates to a preparation method and application of a self-powered sensor. Specifically, the invention designs a self-energized sensor which utilizes a photoanode WO3/In2S3 and a photocathode Pt-ZnO/Bi2S3 to promote generation of anode photocurrent at the same time, and the self-energized sensor can be used for photoelectrochemical immunosensing detection. Under the irradiation of visible light, the Pt-ZnO/Bi2S3 serving as the photoelectric cathode has a relatively good energy band matching structure and can provide stable cathode photocurrent; the WO3/In2S3 heterostructure provides stable anode photocurrent for the photoanode substrate material, and the larger specific surface area of the WO3/In2S3 heterostructure can increase the capture of light and the load of biomolecules. In addition, photo-induced electrons of the photoanode WO3/In2S3 flow along an external circuit to attract photo-induced holes of the photocathode Pt-ZnO/Bi2S3, the carrier transmission rate is increased, and the photocurrent response of the anode is improved. The prepared BiNS-Fe@Fe serves as a marker, competitively consumes light energy and electron donors, the stability and sensitivity of the sensor are improved, and the self-powered sensor constructed by the invention is used for rapid and sensitive photoelectrochemical immunosensing detection of tumor markers, and has a wider detection range and a lower detection limit.

Description

technical field [0001] The invention relates to the technical fields of nanoscience, sensor device preparation and biochemical sensing and detection, and provides a method for preparing a self-powered sensor that can be used for photoelectrochemical immune sensing and detection. Background technique [0002] Tumor markers, also known as tumor markers, refer to substances that are characteristically present in malignant tumor cells, or abnormally produced by malignant tumor cells, or produced by the host in response to tumor stimulation, and can reflect the occurrence and development of tumors. , a class of substances that monitor tumor response to therapy. Tumor markers exist in the tissues, body fluids and excreta of tumor patients, and can be detected by immunological, biological and chemical methods. For example, one of the most common tumor markers, CA19-9 (Carbohydrate Antigen 19-9), also known as Cancer Antigen 19-9, can be found in blood, urine, or human tissue. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30G01N27/327
CPCG01N27/26G01N27/30G01N27/3278
Inventor 张勇刘德玲马洪敏吴丹任祥李玉阳王欢范大伟孙旭魏琴王雪莹
Owner UNIV OF JINAN
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