Self-powered sensor used for detecting microcystic toxins

A microcystin and self-powered technology, which is applied in the field of photocatalytic fuel cells and sensors, can solve the problems of high cost, harsh operating conditions, and low energy conversion efficiency of photo-assisted fuel cells, so as to reduce production costs and achieve good results. Application prospect, effect of improving energy utilization efficiency

Inactive Publication Date: 2019-01-29
CHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a method for preparing a self-powered sensor for detecting the cyanotoxin microcystin. The method is based on photocatalytic fuel cell technology and uses TiO 2 The nanomaterial is used as the photoanode, and the bismuth oxybromide-modified azagraphene (NG-BiOBr) nanomaterial is used as the photocathode to construct a photo-assisted fuel cell driven by dual photoelectrodes, which is used to construct a new type of self-powered sensor, which solves the problem of existing Self-powered electrochemical sensors mainly rely on biomass fuel cell technology, which has problems such as high cost and harsh operating conditions, as well as the technical problems of low energy conversion efficiency of photo-assisted fuel cells.

Method used

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  • Self-powered sensor used for detecting microcystic toxins
  • Self-powered sensor used for detecting microcystic toxins
  • Self-powered sensor used for detecting microcystic toxins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of Photoelectrodes

[0025] (1) Preparation of photoanode: First, 4mL [TiO(C 4 h 9 O) 4 ] dissolved in 20mL 6mol / L of HNO 3 TiO(NO 3 ) 2 solution, and then the TiO(NO 3 ) 2 The solution was transferred to a polytetrafluoroethylene-lined reactor, and reacted at 160°C for 12 hours. After natural cooling, the reaction product was centrifuged, washed with ultrapure water and absolute ethanol, and finally dried at 60°C. , to obtain the photoanode nanomaterial TiO 2 . The powder obtained above was ultrasonically dispersed in N,N-dimethylformamide (DMF) to prepare a 6 mg / mL ultrasonic dispersion. Pipette 20μL of the above dispersion solution and apply it on the effective area of ​​0.5cm 2 The surface of the ITO electrode was heated and dried under an infrared lamp. At this time, it can be observed that a layer of uniform film structure is naturally formed on the surface of the ITO electrode, and the preparation of the photoanode is completed.

[0026]...

Embodiment 2

[0033] 1. Preparation of Photoelectrodes

[0034] (1) Preparation of photoanode: First, 5mL [TiO(C 4 h 9 O) 4 ] dissolved in 40mL 6mol / L of HNO 3 TiO(NO 3 ) 2 solution, and then the TiO(NO 3 ) 2 The solution was transferred to a polytetrafluoroethylene-lined reaction kettle, reacted at 180°C for 12 hours, and after natural cooling, the reaction product was centrifuged, washed with ultrapure water and absolute ethanol, and finally dried at 60°C , to obtain the photoanode nanomaterial TiO 2 . The powder obtained above was ultrasonically dispersed in DMF to prepare a 6 mg / mL ultrasonic dispersion. Pipette 20μL of the above dispersion solution and apply it on the effective area of ​​0.5cm 2 The surface of the ITO electrode was heated and dried under an infrared lamp. At this time, it can be observed that a layer of uniform film structure is naturally formed on the surface of the ITO electrode, and the preparation of the photoanode is completed.

[0035] (2) Preparation ...

Embodiment 3

[0041] 1. Preparation of Photoelectrodes

[0042] (1) Preparation of photoanode: First, 5mL TiO(C 4 h 9 O) 4 Dissolved in 50mL 6mol / L HNO 3 TiO(NO 3 ) 2 solution, and then the TiO(NO 3 ) 2 The solution was transferred to a polytetrafluoroethylene-lined reactor, and reacted at 200°C for 12 hours. After natural cooling, the reaction product was centrifuged, washed with ultrapure water and absolute ethanol, and finally dried at 60°C. , to obtain the photoanode nanomaterial TiO 2 . The powder obtained above was ultrasonically dispersed in DMF to prepare a 6 mg / L ultrasonic dispersion. Pipette 20μL of the above dispersion solution and apply it on the effective area of ​​0.5cm 2 The surface of the ITO electrode was heated and dried under an infrared lamp. At this time, it can be observed that a layer of uniform film structure is naturally formed on the surface of the ITO electrode, and the preparation of the photoanode is completed.

[0043] (2) Preparation of photocathod...

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Abstract

The invention discloses a self-powered sensor used for detecting microcystic toxins. The sensor comprises a photoanode, a photocathode, a simulated-solar-light source, an electrolyte solution, a quartz reaction pool, an air vent and a microcystic-toxin standard concentration solution; The photoanode and the photocathode are inserted into the quartz reaction pool containing the electrolyte solution, and are in communication through an external circuit. The photocathode is close to the air vent. The light source simultaneously illuminates the photoanode and the photocathode. The sensor is characterized in that the electrolyte solution is a phosphate buffer solution with pH=4-6, and a constructed dual-photoelectrode-driven photo-assisted fuel cell system forms a current pathway under drivingof self-bias voltage generated by the photoanode and the photocathode under a light illumination condition, and generates electrical energy. According to the sensor of the invention, use of externallyadded power sources is avoided; and dual-photoelectrode-driven photo-assisted fuel cell technology is used for constructing a self-powered sensing platform, an energy utilization efficiency ratio isimproved, and manufacturing costs of the self-powered sensor are also reduced.

Description

technical field [0001] The invention relates to a self-powered sensor for detecting cyanotoxin microcystin, in particular to a preparation method of a photocatalytic fuel cell driven by double photoelectrodes, and belongs to the field of photocatalytic fuel cell and sensing. Background technique [0002] Self-powered electrochemical sensors refer to a new class of sensors that directly obtain energy from the environment without the need for traditional batteries or AC power sources. Because they can get rid of the limitation of external energy sources to generate signals for detection, it greatly simplifies the preparation process of the sensor and reduces the detection cost. The cost is very conducive to the development of sensors in the direction of miniaturization and integration. [0003] At present, the research on self-powered electrochemical sensors is mainly realized through the approach of biomass fuel cells. Biomass fuel cells only realize a single energy conversi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26H01G9/20
CPCG01N27/26H01G9/2036Y02E10/542
Inventor 杜晓娇张兵蒋鼎
Owner CHANGZHOU INST OF TECH
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