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Functionalized molybdenum disulfide nano sheet composite membrane modified electrode and preparation method and detection application thereof

A molybdenum disulfide, modified electrode technology, applied in the direction of measuring devices, electrochemical variables of materials, and material analysis through electromagnetic means, to achieve the effects of improving direct electrochemical and electrocatalytic performance, enhancing electrical conductivity, and simple preparation methods

Active Publication Date: 2019-01-04
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, MoS in media containing thiol ionic liquids 2 The preparation of ionic liquid functionalized molybdenum disulfide nanosheet-gold nanoparticle composite with AuNPs, and the preparation of membrane-modified electrode based on the composite and the research on BPA detection have not been reported yet.

Method used

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  • Functionalized molybdenum disulfide nano sheet composite membrane modified electrode and preparation method and detection application thereof
  • Functionalized molybdenum disulfide nano sheet composite membrane modified electrode and preparation method and detection application thereof
  • Functionalized molybdenum disulfide nano sheet composite membrane modified electrode and preparation method and detection application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (a) IL-MoS 2 Preparation of dispersion

[0026] Weigh 10mg IL into 40mL DMF, then weigh 40mg MoS 2 Dispersed in the above DMF solution, ultrasonically reacted for 12h, to obtain IL-MoS 2 Dispersions;

[0027] (b)IL-MoS 2 - Preparation of AuNPs nanocomposites

[0028] Take 20mLIL-MoS 2 To the dispersion liquid, 10mL of AuNPs dispersion liquid was slowly added dropwise under continuous stirring, and after being fully mixed, it was stirred at room temperature for 8 hours, centrifuged at 5000rmp for 10min, washed with water and absolute ethanol three times in turn, and the black precipitate obtained was IL- MoS 2 - AuNPs composites;

[0029] (c)IL-MoS 2 - Preparation of AuNPs composite membrane modified GCE

[0030] Grind and polish the base electrode into a mirror surface, then ultrasonically clean and dry it with ultrapure water to obtain a good GCE; the IL-MoS obtained in step (b) 2 -Ultrasonic dispersion of the AuNPs composite material in deionized solution to...

Embodiment 2

[0032] (a) IL-MoS 2 Preparation of dispersion

[0033] Weigh 15mg IL into 40mL DMF, then weigh 40mg MoS 2 Dispersed in the above DMF solution, ultrasonically reacted for 16h, to obtain IL-MoS 2 Dispersions;

[0034] (b)IL-MoS 2 - Preparation of AuNPs nanocomposites

[0035] Take 20mLIL-MoS 2 To the dispersion liquid, 10 mL of AuNPs dispersion liquid was slowly added dropwise under continuous stirring, and after mixing thoroughly, it was stirred at room temperature for 12 hours under airtight conditions, centrifuged at 5000 rpm for 10 min, and washed three times with water and absolute ethanol in turn, and the black precipitate obtained was IL- MoS 2 - AuNPs composites;

[0036] (c)IL-MoS 2 - Preparation of AuNPs composite membrane modified GCE

[0037] Grind and polish the base electrode into a mirror surface, then ultrasonically clean and dry it with ultrapure water to obtain a good GCE; the IL-MoS obtained in step (b) 2 -Ultrasonic dispersion of the AuNPs composite...

Embodiment 3

[0039] (a) IL-MoS 2 Preparation of dispersion

[0040] Weigh 20mg IL into 40mL DMF, then weigh 40mg MoS 2 Dispersed in the above DMF solution, ultrasonically reacted for 12h, to obtain IL-MoS 2 Dispersions;

[0041] (b)IL-MoS 2 - Preparation of AuNPs nanocomposites

[0042] Take 20mLIL-MoS 2 To the dispersion, 10mL of AuNPs dispersion was slowly added dropwise under continuous stirring, and after being fully mixed, it was stirred for 16 hours under airtight conditions at room temperature, centrifuged at 5000rmp for 10min, and washed three times with water and absolute ethanol in turn, and the black precipitate obtained was IL- MoS 2 - AuNPs composites;

[0043] (c)IL-MoS 2 - Preparation of AuNPs composite membrane modified GCE

[0044] Grind and polish the base electrode into a mirror surface, then ultrasonically clean and dry it with ultrapure water to obtain a good GCE; the IL-MoS obtained in step (b) 2 -Ultrasonic dispersion of the AuNPs composite material in deio...

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Abstract

The invention discloses a functionalized molybdenum disulfide nano sheet composite membrane modified electrode and a preparation method and an application in the detection of bisphenol A. Firstly, themolybdenum disulfide is peeled from an N, N-dimethylformamide solution containing sulfydryl ionic liquid, the molybdenum disulfide is peeled into sheet and is functionalized by the ionic liquid, andthen is compounded with gold nanoparticles to prepare an ionic liquid-molybdenum disulfide nano sheet-gold nanoparticle compound. A corresponding composite membrane modified electrode is prepared by using a dispensing method. The surface of the obtained modified electrode has the advantages of large effective area, multiple active sites, good dispersibility and the like, exerts the synergistic effect of the ionic liquid, molybdenum disulfide nano sheets and gold nanoparticles in improving the direct electrochemical and electrocatalysis performance. The conductivity and catalytic performance ofthe modified electrode are improved. The obtained bisphenol A sensor based on the modified electrode has the advantages of low detection limit, wide detection range, rapid response and the like.

Description

Technical field: [0001] The invention relates to a functionalized molybdenum disulfide nanosheet composite film modified electrode and its preparation method and application; specifically refers to the preparation and electrochemical detection of a glassy carbon electrode modified based on ionic liquid functionalized molybdenum disulfide nanosheet-nano gold composite film The application of bisphenol A belongs to the field of environmental protection. Background technique: [0002] Bisphenol A (BPA) is an exogenous endocrine disruptor widely used in the synthesis of polycarbonate, epoxy resin and other special additives. Due to the large amount of use, BPA can easily seep into the air, food, water and soil, thereby further migrating to aquatic organisms and human organs. Studies have shown that BPA can have adverse effects on the secretion of estrogen in the human body. Even if there is a low content in human blood, it can also cause sexual dysfunction, reduce sperm quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 詹天荣王闰夏康敬霞
Owner QINGDAO UNIV OF SCI & TECH