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High-sensitivity electrochemical sensor for detecting copper ions and application thereof

A high-sensitivity, copper ion technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of increasing the complexity and cost of preparation, limiting the large-scale production of nitrogen-doped biochar, and achieving low cost and selective Strong and stable effect

Active Publication Date: 2022-02-15
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of nitrogen-doped biochar usually requires the addition of expensive and toxic nitrogen-containing compounds (urea, acrylonitrile, ammonium chloride, etc.), which increases the complexity and cost of the preparation and limits the scale-up of nitrogen-doped biochar. Production

Method used

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  • High-sensitivity electrochemical sensor for detecting copper ions and application thereof
  • High-sensitivity electrochemical sensor for detecting copper ions and application thereof
  • High-sensitivity electrochemical sensor for detecting copper ions and application thereof

Examples

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Embodiment 1

[0030] An electrochemical sensor for detecting copper ions with high sensitivity is made by drip-coating natural N-doped activated biochar on the surface of a polished glassy carbon electrode and drying it;

[0031] The preparation method of described natural N-doped activated biochar, comprises the steps:

[0032] Wash 3g of cicada shells with water to remove impurities, dry (dry at 120°C for 12h), grind into powder with a mixer, then sieve with a 400-mesh sieve, and then disperse the pulverized cicada shell powder in a concentration of 6mol L -1 KOH solution made of 9g of potassium hydroxide, then poured into a stainless steel autoclave, activated at 150°C for 6h, filtered to collect the material, and stored at 80°C under vacuum for 12 hours;

[0033] Put the activated cicada shell powder in a tube furnace, N 2 Under the atmosphere, the temperature was raised to 800 °C at a heating rate of 2 °C / min, and carbonized for 5 h; the carbonized product was neutralized with dilute ...

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Abstract

The invention belongs to the technical field of electrochemical sensors, and particularly relates to a high-sensitivity electrochemical sensor for detecting copper ions, which is produced by dispensing natural N-doped activated charcoal on the surface of a polished glassy carbon electrode and drying. According to the invention, rich poly-beta (1 / 4)-N-acetyl-D-glucosamine in cicada shells is directly used as a nitrogen source to prepare natural N-doped activated charcoal (NAC), an NAC electrode is used as an electrochemical sensing platform, a copper ion peak current (ICu < 2 + >) is used as an output signal, and the copper ions are subjected to electrochemical detection in an electrolyte solution. The electrochemical sensor prepared by the invention shows good detection sensitivity to copper ions. In addition, the electrochemical sensor constructed by the invention has the advantages of easiness in preparation of an electrode material, low cost, simplicity and convenience in operation, rapidness, high efficiency, high sensitivity and the like, and has good application prospects and potential application values in the field of heavy metal ion analysis and detection.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, in particular to an electrochemical sensor for detecting copper ions with high sensitivity and its application. Background technique [0002] It is well known that heavy metal ions can accumulate in organisms and combine with biological ligands containing N, S, and O to cause serious health problems. Because of copper's widespread use in pipes, wires, air conditioners, pipes and roofs, it contributes more to water pollution than other heavy metal ions. Copper (Cu), as one of the essential minerals for human beings, is essential for the formation of red blood cells and various metalloenzymes, and for maintaining the nervous system and immune function. However, too much or too little intake of copper ions will destroy the balance of copper in the body. High concentrations of copper may cause liver damage, nausea, abdominal pain, vomiting and other gastrointestinal symptoms in human...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48Y02P10/20
Inventor 黄喜根卢丽敏邹锦刘家微刘书武高艳莎
Owner JIANGXI AGRICULTURAL UNIVERSITY
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