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Polyrutin-silver nanoparticle-glassy carbon electrode and preparation method thereof

A technology of silver nanoparticles and glassy carbon electrodes, applied in nanotechnology, nanotechnology, nanotechnology for sensing, etc., can solve problems such as not reaching nmol/L, achieve good sensitivity, low detection limit, good The effect of biocompatibility

Inactive Publication Date: 2020-09-22
NANJING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its detection range is 1-8 μmol / L, and it does not reach the lower nmol / L level

Method used

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  • Polyrutin-silver nanoparticle-glassy carbon electrode and preparation method thereof
  • Polyrutin-silver nanoparticle-glassy carbon electrode and preparation method thereof
  • Polyrutin-silver nanoparticle-glassy carbon electrode and preparation method thereof

Examples

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Embodiment 1

[0040] This example is to prepare a polyrutin-silver nanoparticle-glassy carbon electrode.

[0041] The basic preparation process of this embodiment includes:

[0042] The glassy carbon electrode is pretreated first, and then the glassy carbon electrode is stored in an electrochemical cell; the supporting electrolyte of the electrochemical cell is 0.1±0.05M H 2 SO 4 , And contains 1±0.5mM rutin and 1±0.5mM AgNO 3 ; Electrochemical deposition by chronoamperometry is used to obtain polyrutin-silver nanoparticles-glassy carbon electrode, which is recorded as poly rutin / AgNPs / GCE.

[0043] Among them, the pretreatment includes: taking the glassy carbon electrode, successively using different particle sizes of alumina powder (the particle size is 1.0μm, 0.3μm, 0.03μm) to polish the glassy carbon electrode to have a mirror-like surface, and then cleaning the glassy carbon electrode : First, ultrasonically clean the glassy carbon electrode with ultrapure water for at least 10 minutes, and t...

Embodiment 2

[0048] In this example, a polyrutin-silver nanoparticle-glassy carbon electrode, namely poly rutin / AgNPs / GCE, was prepared according to Example 1, and then a number of characteristics were identified. The following is the result of poly rutin / AgNPs / GCE prepared according to the specific conditions exemplified in Example 1, and the identification of various characteristics. Among them, when it comes to testing items for polyrutin-silver nanoparticle composite materials, the composite materials tested are taken from the film peeled off from poly rutin / AgNPs / GCE.

[0049] figure 2 SEM images (deposition time A-5min, C-10min, E-20min and G-30min) and corresponding element surface distribution maps (B, D, F, and H) for scanning electron microscopy; 30min of polyrutin / silver nano The high-resolution transmission electron microscope TEM image (I) and X-ray energy spectrum (J) of the particles. Among them, the SEM image shows the rod-like morphology of the composite material. When the ...

Embodiment 3

[0058] After the successful characterization of the glassy carbon electrode in Example 2 and the successful modification of the electrode and its excellent electron transfer ability, in order to enhance the dissolution voltammetric detection of Pb(II) and Cd(II) ions by poly rutin / AgNPs / GCE Analyzing operation, this embodiment has studied in detail various analysis parameters such as supporting electrolyte, pre-enrichment potential, pre-enrichment time, and supporting electrolyte pH, and optimized the parameters.

[0059] In this example, a polyrutin-silver nanoparticle-glassy carbon electrode, namely poly rutin / AgNPs / GCE, was prepared according to Example 1, and then a number of studies were conducted. The following are the results of the preparation of poly rutin / AgNPs / GCE according to the specific conditions exemplified in Example 1 and various studies.

[0060] Figure 4 In Figure A and Figure B, it is shown that although most metal salt electrolytes have a pH range of acetic a...

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Abstract

The invention relates to a polyrutin-silver nanoparticle-glassy carbon electrode and a preparation method thereof. The preparation method comprises the following steps: storing a glassy carbon electrode in an electrochemical electrolytic tank, wherein a supporting electrolyte of the electrochemical electrolytic tank is H2SO4 and contains rutin and AgNO3; and performing electrochemical deposition by adopting a timing ampere method to obtain the polyrutin-silver nanoparticle-glassy carbon electrode. The polyrutin-silver nanoparticle-glassy carbon electrode can be prepared by adopting an electrochemical deposition one-step preparation method, the steps are simple, and the operation is convenient; the electrode can rapidly detect various heavy metal ions in an environmental sample at the sametime, the heavy metals in different environmental samples (soil, water, hair and the like) can be rapidly detected, the sensitivity, the selectivity and the repeatability are good, the detection limitis low, the linear range is wide compared to the similar electrode in the prior art, and the significant difference does not exist in the detection of the heavy metals in the environmental samples compared to the widely-used inductively coupled plasma mass spectrometry analysis technology.

Description

Technical field [0001] The invention relates to a polyrutin-silver nanoparticle-glassy carbon electrode and a preparation method thereof, and belongs to the technical fields of nanotechnology, electrochemical synthesis, electrochemical sensors, and biomedicine applications. Background technique [0002] According to the applicant's understanding, heavy metal ions are easily enriched in the ecosystem due to their non-degradability and have become important hazardous pollutants in the environment. A variety of analytical techniques have been developed to detect heavy metals in environmental samples, such as spectrophotometry, colorimetry, atomic absorption and emission spectrometry. However, these heavy metal detection and analysis techniques usually require expensive, precise, and cumbersome instruments. Equipment, and the detection time is longer. Moreover, because the ion concentration in the environmental sample is low and there are many interfering substances, it is necessary...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/333C25D9/02B22F1/00B82Y15/00
CPCG01N27/308G01N27/333C25D9/02B82Y15/00B22F1/054
Inventor 陈进周刘柱姜慧君利玛林汗·马里卡丹郑烨清张佳奕
Owner NANJING MEDICAL UNIV
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