Photo-fuel cell sensor based on anode light induction and pollutant analysis method

A fuel cell and sensor technology, applied in the direction of material analysis, material analysis, and material electrochemical variables through electromagnetic means, can solve the problems of stability and reproducibility, output power drop, detection signal change, etc., to achieve stability Good, accelerated transfer rate, high output power effect

Active Publication Date: 2020-06-26
TONGJI UNIV
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  • Application Information

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Problems solved by technology

Due to the many modification steps involved in the preparation of these electrodes, their stability and reproducibility are easily compromised
In addition, the anode is an important source of electrons to provide power. Many researchers load the anode with molecular imprinting, aptamers, enzymes and other recognition elements, resulting in the disadvantages of decreased output power and insignificant changes in detection signals.

Method used

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  • Photo-fuel cell sensor based on anode light induction and pollutant analysis method

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Experimental program
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Effect test

Embodiment 1

[0044] A self-powered sensor for atrazine was prepared as follows:

[0045] (1) Preparation of Ti-Fe-O NTs substrate electrode. First, the Ti-Fe alloy plate (the content of iron is 6wt%) with a size of 30×10×1 mm was polished to a smooth surface using 180#, 320#, 600# and metallographic sandpaper in sequence. Then ultrasonically clean with acetone, absolute ethanol, and high-purity water for 10 minutes, and dry naturally for later use. Secondly, at room temperature, the Ti-Fe alloy plate was used as the anode, placed in the 4 F and 2wt%H 2 In the ethylene glycol solution of O, the platinum plate electrode was used as the cathode, and the distance between the electrodes was 1 cm. Under the condition of stirring at a rotational speed of 100r / min, a DC power supply was used to apply a voltage of 30V to carry out anodic oxidation for 3h, and then the electrode was taken out, and the residual electrolyte on the surface was washed with high-purity water. Finally, it was placed i...

Embodiment 2

[0057] Adopt the self-powered sensor prepared in embodiment 1 to measure the ATZ of different concentrations:

[0058] Atrazine solutions with a series of concentrations were prepared with PBS (PH=7) buffer solution: 0 nM, 0.01 nM, 0.1 nM, 0.5 nM, 1 nM, 5 nM, 10 nM, 50 nM, 100 nM. Incubate the cathode GCE / G / MIP with a series of concentrations of ATZ sequentially, each incubation time is 10min. Under the anodic extreme condition of visible light irradiation, the OCP-T of the self-powered sensor at different concentrations was measured. Through the analysis results, it was found that within a certain concentration range, as the concentration of atrazine increased, the OCP decreased. When the OCP measured by the self-powered sensor was 792mV under blank conditions, the OCP value of the sensor dropped to 785mV after incubation with 0.01nMATZ. After further incubation with 0.1nM ATZ, the OCP value of the sensor dropped to 781mV. This is due to the specific binding of atrazine to...

Embodiment 3

[0060] Adopt the self-powered sensor prepared by embodiment 1 to carry out selective determination:

[0061] Add 8.00mL of 100mM NaOH solution (containing 50mM glucose solution) and 8.00mL of 10mM potassium ferricyanide solution into the anode chamber and the cathode chamber respectively. With the prepared anode Ti-Fe-O NTs / Ni(OH) 2 It is placed in the anode chamber, and the prepared cathode GCE / G / MIP is placed in the cathode chamber. Under the condition of excitation light, the OCP of the self-powered sensor is measured by OCPT technique. GCE / G / MIP was used to incubate 1nM ATZ solution, followed by incubation with 100 times the concentration of interfering substances: hemoglobin, paraquat, monosultap, and acetamiprid, and their OCPs were determined respectively. The relative ratio (R%) of the associated open-circuit voltage was calculated to obtain the selectivity of the self-powered sensor. The results showed that when hemoglobin and acetamiprid contained 100 times the co...

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Abstract

The invention relates to a photo-fuel cell self-powered sensor based on anode light induction and an environmental pollutant analysis method. The sensor comprises a photo-anode, a cathode, photo-anodefuel and cathode fuel; the photo-anode is a Ti-Fe-O NTs / Ni (OH) 2 electrode, the cathode is a GSE / G / MIP electrode, the photo-anode fuel is glucose, and the cathode fuel is K3 [Fe (CN) 6]. Compared with the prior art, a detection mode of energy supply and sensing separation is realized; the output power, the stability and the selectivity of the self-powered sensor are greatly improved, the sensitivity is high, and the detection limit on environmental pollutants ATZ and the like is as low as 2.81 pM. Meanwhile, the preparation method is simple, the cost is low, the analysis method is simple andconvenient, and the method has good reproducibility and an application prospect for on-site determination.

Description

technical field [0001] The invention belongs to the fields of environmental monitoring, self-supply technology and photoelectrochemical technology, and relates to a photofuel cell self-supply sensor based on anode light induction and a method for selectively analyzing environmental pollutants using the sensor. Background technique [0002] Environmental pollution is a social hot issue that is widely concerned around the world. It is known that a variety of environmental pollutants may cause serious harm to human body or other organisms at extremely low exposure concentrations. The pesticide endocrine disruptor atrazine (C 8 h 14 ClN 5 , ATZ) as an example. ATZ is one of the most widely used and effective herbicides in the world. Currently, ATZ can be detected in various agricultural products and environmental media, especially in soil, groundwater and drinking water. Studies have shown that long-term exposure to atrazine increases a woman's risk of breast cancer and in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/327G01N27/38G01N27/32G01N27/30
CPCG01N27/301G01N27/32G01N27/3277G01N27/38G01N27/48
Inventor 刘梅川陆汉星孙欢欢赵国华
Owner TONGJI UNIV
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