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Preparation method and application of self-cleaning electrochemical sensor under visible light

A sensor and electrochemical technology, applied in the field of preparation of electrochemical sensors, can solve the problems of complicated pretreatment process, expensive analytical instruments, long analysis time, etc., and achieve the effect of low cost, expensive and cumbersome solutions, and wide application prospects

Inactive Publication Date: 2019-04-12
HUBEI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common methods for the detection of 4-NP include gas chromatography, liquid chromatography, fluorescence spectrophotometry, ultraviolet spectroscopy, etc. However, these methods often have some problems such as complicated pretreatment process, lengthy analysis time, analysis Instruments are expensive, etc.

Method used

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  • Preparation method and application of self-cleaning electrochemical sensor under visible light
  • Preparation method and application of self-cleaning electrochemical sensor under visible light
  • Preparation method and application of self-cleaning electrochemical sensor under visible light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing an electrochemical sensor with self-cleaning ability under visible light, comprising the following steps in sequence:

[0043] (1) Take by weighing 7.7mg meso-tetrakis (4-carboxyphenyl) porphyrin copper (Cu (II) TCPP) with electronic balance, put into 50ml single-necked flask, add 20mL solvent trichloromethane wherein to make Cu ( II) Dissolve TCPP, and then add TiO after drying at 120°C for 2 hours 2 1g, stirred at room temperature for 4h, chloroform was evaporated under reduced pressure, the solid was collected and ground, dried at 80°C for 30min to obtain Cu(II)TCPP-sensitized TiO 2 , recorded as Cu(II)TCPP / TiO 2 , and its UV-vis absorption pattern is shown in figure 2 shown;

[0044] (2) Weigh 1.0mg of graphene oxide (GO) and 1.0mg of Cu(II)TCPP / TiO respectively 2 Add it to a 10mL beaker, then take 10mL of DMF (N,N-dimethylformamide) into the beaker with a pipette, put it into an ultrasonic instrument for 3h, and obtain Cu(II)TCPP / TiO 2...

Embodiment 2

[0050] A method for preparing an electrochemical sensor with self-cleaning ability under visible light, comprising the following steps in sequence:

[0051] (1) Weigh 7.7mg meso-tetrakis(4-carboxyphenyl)porphyrin iron chloride (Fe(III)TCPP) with an electronic balance, put it into a 50ml single-necked flask, add 20mL solvent chloroform to it to make Dissolve Fe(III)TCPP, and then add TiO after drying at 120°C for 2h 2 1g, stirred at room temperature for 4h, the solvent chloroform was evaporated under reduced pressure, the solid was collected and ground, and dried at 80°C for 30min to obtain Fe(III)TCPP-sensitized TiO 2 , denoted as Fe(III)TCPP / TiO 2 ;

[0052] (2) Weigh 1.0mg of graphene oxide (GO) and 1.0mg of Fe(III)TCPP / TiO respectively 2 Add it to a 10mL beaker, then use a pipette to take 10mL of DMF into the beaker, put it into an ultrasonic instrument for 3h, and get Fe(III)TCPP / TiO 2 / GO dispersion;

[0053] (3) Take 20 mg of neutral alumina (0.05 μm) and wet it wi...

Embodiment 3

[0058] A method for preparing an electrochemical sensor with self-cleaning ability under visible light, comprising the following steps in sequence:

[0059] (1) Take by weighing 7.7mg meso-tetrakis (4-carboxyphenyl) porphyrin palladium (Pd (II) TCPP) with electronic balance, put into 50ml single-necked flask, add 20mL solvent trichloromethane wherein to make Pd ( II) Dissolve TCPP, and then add TiO after drying at 120°C for 2 hours 2 1g, stirred at room temperature for 4h, the solvent chloroform was evaporated under reduced pressure, the solid was collected and ground, and dried at 80°C for 30min to obtain Pd(II)TCPP-sensitized TiO 2 , denoted as Pd(II)TCPP / TiO 2 ;

[0060] (2) Weigh 1.0mg of graphene oxide (GO) and 1.0mg of Pd(II)TCPP / TiO respectively 2 Add it to a 10mL beaker, then take 10mL of DMF into the beaker with a pipette, put it into an ultrasonic instrument and sonicate it for 3h to obtain Pd(II)TCPP / TiO 2 / GO dispersion;

[0061] (3) Take 20 mg of neutral alu...

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Abstract

The invention discloses an electrochemical sensor with self-cleaning capability comprising an electrode chip and a TiO2 composite graphene oxide modified material sensitized with meso-tetrakis(4-carboxyphenyl)porphyrin metal complex, and the composite modified material is attached to the surface of the chip. The sensor is simple in preparation, time-saving, low in cost, and environmentally friendly. In particular, the residual of the polymer and the detected material attached to the surface of the electrode chip after the detection can be oxidized under visible light to realize the regeneration and self-cleaning of the electrochemical sensor under visible light. The electrochemical sensing platform regenerated under visible light not only reduces the cumbersome procedure of electrode polishing modification, but also reduces the cost of modifying materials, and the descaling regeneration of the electrode prolongs the service life of the electrode. The invention, which is used for the detection of nitrophenol, one of the environmental pollutants, is easy to operate and select, high in sensitivity, and low in detection limit.

Description

technical field [0001] The invention relates to the technical field of preparation of electrochemical sensors, in particular to a preparation method and application of a self-cleaning electrochemical sensor under visible light. The sensor is an electrochemical sensor for measuring nitrophenol and has the ability to achieve self-cleaning under visible light . Background technique [0002] Electrochemical sensing technology has shown high detection ability and effect in biochemical, medical, food environment monitoring and other fields. Electrochemical analysis method has low cost, fast analysis speed, good detection performance, less sample consumption, high sensitivity, and selectivity. It has the advantages of good performance, convenient operation, and no complicated pretreatment process. It can achieve quantitative detection and analysis for biological samples, environmental monitoring and food safety. However, for electrochemical methods, the chemical reaction occurs o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/38G01N27/26G01N27/30
CPCG01N27/26G01N27/30G01N27/38
Inventor 郑寅陈泇冰李晨晨宋新建
Owner HUBEI UNIV FOR NATITIES