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Bio-based ionic imprinting sensor for detecting copper ions and preparation method thereof

An ion imprinting and copper ion technology, which is applied in the field of functional materials and electrochemical sensing, can solve the problems of high environmental requirements for the use of biosensors, difficult to obtain identification elements, and difficult to store for a long time, and achieves chemical stability, reusable, Improve stability and good stability

Active Publication Date: 2019-05-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, biopolymers (DNA, DNAzyme) have inherent defects such as instability from the biological environment, easy degradation, inactivation, diffusion and aggregation, etc., which make biosensors have high requirements for the use environment and are difficult to Long-term preservation, high cost and difficulty in obtaining identification components have become key factors that limit the further development of heavy metal biosensors

Method used

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  • Bio-based ionic imprinting sensor for detecting copper ions and preparation method thereof
  • Bio-based ionic imprinting sensor for detecting copper ions and preparation method thereof
  • Bio-based ionic imprinting sensor for detecting copper ions and preparation method thereof

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Embodiment 1

[0029] The preparation method of the bio-based ion imprint sensor for detecting copper ions described in the present invention is as follows figure 1 shown.

[0030] (1) Disperse 350mg of graphite oxide in 40ml of distilled water by ultrasonic treatment, then add 40mL of 20% ammonia water to it, and continue ultrasonic dispersion for 0.5h; then carry out hydrothermal reaction of the mixed solution in the reactor at 160°C for 5h; cool to room temperature , filtered with suction, washed with 45% by mass percent hydrochloric acid, absolute ethanol, and distilled water to neutrality, and dried to obtain amino-functionalized graphene.

[0031] (2) A glassy carbon electrode with a diameter of 3 mm is used with a particle size of 1.0 μm Al 2 o 3 The powder was mechanically polished to a smooth mirror surface, then ultrasonically cleaned with double distilled water for 2 minutes each time, repeated three times, then ultrasonically cleaned with absolute ethanol and double distilled w...

Embodiment 2

[0037] (1) Disperse 350mg of graphite oxide in 40ml of distilled water by ultrasonic treatment, then add 40mL of 20% ammonia water to it, and continue ultrasonic dispersion for 0.5h; then carry out hydrothermal reaction of the mixed solution in the reactor at 160°C for 6h; cool to room temperature , filtered with suction, washed with 45% by mass percent hydrochloric acid, absolute ethanol, and distilled water to neutrality, and dried to obtain amino-functionalized graphene.

[0038] (2) A glassy carbon electrode with a diameter of 3 mm is used with a particle size of 1.0 μm Al 2 o 3 The powder was mechanically polished to a smooth mirror surface, then ultrasonically cleaned with double distilled water for 3 minutes each time, repeated three times, then ultrasonically cleaned with absolute ethanol and double distilled water for 3 minutes, dried with nitrogen, and then put into 1.0mol / L electrolyte solution h 2 SO 4 The quasi-reversible cyclic voltammetry peak is obtained by ...

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Abstract

The invention provides a bio-based ion imprinting sensor for detecting copper ions and a preparation method of the bio-based ion imprinting sensor. According to the invention, the biosensor with a highly matched space structure with copper ions is constructed by adopting an ion imprinting technology and utilizing the good water solubility, film forming property and extremely strong metal chelatingcapability of the biomaterial carboxymethyl chitosan and combining the stability, high conductivity and excellent mechanical property of amino functionalized graphene. The bio-based ionic imprintingsensor disclosed by the invention can overcome inherent defects of DNA, such as instability, easy degradation, inactivation, diffusion, aggregation and the like, when being separated from a biologicalenvironment, has the advantages of simple preparation conditions, strong severe environment resistance, greenness, environmental protection, high sensitivity and strong anti-interference capability,and can realize sensitive detection of copper ions in a water system.

Description

technical field [0001] The invention belongs to the field of functional materials and electrochemical sensing, and relates to a bio-based ion imprint sensor for detecting copper ions and a preparation method thereof. Background technique [0002] With the development of the metallurgical industry and the electronics industry, a large amount of copper powder washing wastewater, electroplating wastewater, and alkaline ammonia etching solution in the production process of printed circuit boards are discharged into the environment, thereby causing harm to the ecosystem and human health. As a beneficial element necessary for life, copper itself is less toxic, but it is harmful to the body after the human body inhales excessive copper. Copper in water is gradually enriched in animals and plants through the food chain and transformed into more toxic metal-organic compounds, which can easily enter the human body through water and food. Due to the high affinity between copper and ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30G01N27/333
Inventor 吴述平叶宝钱李松军
Owner JIANGSU UNIV
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