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All-solid-state ion-selective electrode and preparation method thereof, and biosensor

An ion-selective, all-solid-state technology, applied in the field of analysis, can solve problems to be improved, and achieve the effect of saving production costs and simplifying preparation steps

Active Publication Date: 2017-12-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, current ion-selective electrode-related technologies still need to be improved

Method used

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  • All-solid-state ion-selective electrode and preparation method thereof, and biosensor
  • All-solid-state ion-selective electrode and preparation method thereof, and biosensor

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Experimental program
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Effect test

Embodiment

[0041] Embodiment, based on graphyne oxide all-solid-state potassium ion selective electrode (GDYO)

[0042] A gold electrode was chosen as the electrode substrate.

[0043] (1) Preparation of electron conversion layer:

[0044] The preferred preparation of graphyne oxide: take 5 mg of graphyne powder, add 5 mg of potassium permanganate, 0.5 mL of concentrated nitric acid and 1.5 mL of concentrated sulfuric acid (concentrated nitric acid: concentrated sulfuric acid volume ratio 1:3), stir and heat to 80 degrees Celsius and keep the reaction for 24 hours , to obtain a red solution, cooled to room temperature, and sonicated for 30 min. Then, under the condition of ice-water bath, sodium hydroxide was added to the solution to adjust the pH of the solution to 9.0. Then centrifuge, the centrifugation speed is 14000 rev / min, centrifugation 10 minutes. The supernatant was discarded, and the precipitate was washed with secondary water. Such centrifugal washing was repeated three t...

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Abstract

The invention discloses an all-solid-state ion-selective electrode and a preparation method thereof, and a biosensor. The all-solid-state ion-selective electrode comprises a substrate, an electron conversion layer arranged on the outer surface of the substrate and containing graphene oxide, and a sensitive film layer arranged on the outer surface of the electron conversion layer. Thus, the stability of the all-solid-state ion-selective electrode can be effectively improved.

Description

technical field [0001] The invention relates to the field of analysis, in particular, the invention relates to an ion-selective electrode, a preparation method, an application and a biosensor. Background technique [0002] Ion-selective electrodes are an important class of electrochemical sensors. The detection principle is based on the relationship between the potential response of the sensitive membrane and the activity of the substance to be measured according to the Nernst equation. Compared with other sensors, ion-selective electrodes have attracted much attention due to their simple principle, easy preparation, convenient operation, high selectivity, rapid response, low price, non-destructive testing, and wide application. And biomedical analysis and other fields have been widely used. Compared with the traditional glass ion selective electrode with inner filling liquid, the all-solid ion selective electrode is stronger and more durable, without the problems of inner ...

Claims

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Application Information

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IPC IPC(8): G01N27/333
Inventor 毛兰群郝洁李玉良刘辉彪
Owner INST OF CHEM CHINESE ACAD OF SCI
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