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Method for measuring octyl phenol by virtue of electrochemical sensor

An octylphenol and sensor technology, applied in the field of electrochemistry, to achieve the effect of improving photocatalytic efficiency, broadening the response range, and enhancing interaction

Active Publication Date: 2015-06-03
武汉莱瑞医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Metal-doped modified g-C 3 N 4 The use of modified electrode sensors for the development of analytical methods for low-concentration environmental pollutants is a challenging research topic, and Ni-doped g-C 3 N 4 Related reports on modified electrodes for photoelectrocatalytic detection of estrogen octylphenol in the environment

Method used

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  • Method for measuring octyl phenol by virtue of electrochemical sensor
  • Method for measuring octyl phenol by virtue of electrochemical sensor
  • Method for measuring octyl phenol by virtue of electrochemical sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Ni-g-C 3 N 4 Preparation of modified electrodes:

[0019] Weigh 49mgNiCl 2 ·6H 2 O powder in a small beaker, a small amount of ultrapure water ultrasonically dissolved, add 3 g of melamine to the above solution, continue ultrasonic stirring to dissolve evenly, then transfer to a ceramic crucible, after heating and stirring evenly, put it into a muffle furnace for heating, the heating rate is 5 ℃ / min, heating temperature 520 ℃, constant temperature 4h, after cooling, yellow Ni-g-C 3 N 4 powder.

[0020] 4mgNi-g-C 3 N 4 The powder was added to 4mL DMF, and ultrasonically dispersed to obtain Ni-g-C 3 N 4 / DMF dispersion, for later use. 0.05μm Al for glassy carbon electrode 2 o 3 Slurry was polished, rinsed and washed in twice distilled water, absolute ethanol, HNO 3 (1:1, V / V) solution was ultrasonically cleaned for 1 min, and dried under an infrared lamp for later use. Pipette 5 μL Ni-g-C 3 N 4 / DMF dispersion, drop-coated on the surface of the glassy carb...

Embodiment 2

[0027] Ni-g-C 3 N 4 The preparation of the modified electrode is the same as in Example 1. The modified electrode is placed in a 0.1% sodium chloride (pH=7.0) buffer system containing the analyte, and after being irradiated by an infrared lamp (220V, 250W) for 3 minutes, a cyclic voltammetry scan is performed. (CV), differential pulse method (DPV) scanning, the scanning speed is 100mV / s, by measuring the current intensity corresponding to the electrocatalytic oxidation peak of octylphenol, determine the content of octylphenol. The rest of the steps are the same as in Example 1.

Embodiment 3

[0029] Ni-g-C 3 N 4The preparation of the modified electrode is the same as in Example 1, the modified electrode is put into the pH of 5.8-8.0 phosphate buffer containing the test substance, and after 3 minutes of irradiation by an infrared lamp (220V, 250W), a cyclic voltammetry scan (CV) is performed And differential pulse method (DPV) scanning, the scanning speed is 100mV / s, by measuring the current intensity corresponding to the electrocatalytic oxidation peak of octylphenol, determine the content of octylphenol. Its optimum pH value is 5.8, the highest sensitivity.

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Abstract

The invention relates to a method for measuring octyl phenol by virtue of an electrochemical sensor. The method comprises the following steps: dispersing Ni-g-C3N4 serving as a modifier into an N,N-dimethylformamide solution, coating dropwise the surface of a glassy carbon electrode with the mixed solution, and drying the glassy carbon electrode to obtain a modified electrode; placing the obtained modified electrode into a solution containing a supporting electrolyte solution and a substance to be measured; performing cyclic voltammetry scanning or differential pulse scanning under the irradiation of an infrared lamp, and determining that octyl phenol exists in the substance to be measured if an electrocatalytic oxidation peak appears. The method has the beneficial effects that the surface of the glassy carbon electrode is modified with a nanometer material with an intensified current signal, and the electrochemical sensor is constructed by the specificity recognition of the nanometer material and octyl phenol; g-C3N4 is doped with other elements or compounds, so that the band gap of g-C3N4 can be changed, the interaction of interlayer atoms can be enhanced, the response duration can be prolonged, and photocatalysis efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a method for measuring octylphenol with an electrochemical sensor. Background technique [0002] Octylphenol is a typical phenolic environmental estrogen and endocrine disruptor, which can seriously affect the growth and reproduction of human cancer cells. Therefore, it is of great significance to develop a simple and efficient analytical method for octylphenol. At present, the analysis methods of octylphenol mainly include high performance liquid chromatography, supercritical fluid chromatography, micellar electrokinetic chromatography, capillary electrophoresis, enzyme-linked immunoassay, gas chromatography-mass spectrometry, liquid chromatography-tandem mass spectrometry These methods often have disadvantages such as high detection cost, long time-consuming, and complicated instrument operation. [0003] g-C 3 N 4 It has excellent electron transport ability and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 邹菁龚晚芸江吉周张胜周鑫彭俊敏柳子涵
Owner 武汉莱瑞医疗科技有限公司
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